Effects of Ce/Y on the cycle stability and anti-plateau splitting of La5-xCexNi4Co (x = 0.4, 0.5) and La5-yYyNi4Co (y = 0.1, 0.2) hydrogen storage alloys
In this study, the microstructure and long-term hydrogen absorption/desorption properties of La5-xCexNi4Co (x = 0.4, 0.5) and La5-yYyNi4Co (y = 0.1, 0.2) alloys are investigated. All the alloys are composed of CaCu5-type hexagonal single-phase structure. The addition of either Ce or Y increases the anisotropic c/a factor of cell lattices, thus enhancing the alloys' pulverization resistance and structural stability. Ce and Y elements also help to eliminate the second plateau in the alloys’ P–C-T curves and increase their application efficiency. In particular, La4.5Ce0.5Ni4Co alloy shows a single and long...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

Controlled-synthesis of β-MnO2 nanorods through a γ-Manganite precursor route
Publication date: Available online 13 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Mohamed S. Selim, Zhifeng Hao, Yi Jiang, Mingming Yi, Yingming ZhangAbstractAs a fascinating nanomaterial, one-dimensional particles have become today's research hotspot and awarded extensive interdisciplinary attention for sustainable development and industrial applications. Single crystal γ-manganite (γ-MnOOH) nanorods were synthesis via a hydrothermal procedure through an oxidation-reduction reaction between potassium permanganate as the precursor and ethane-1,2-diol as the reducing agent and solvent at 120 °...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

Effect of Fe2O3-CeO2 nanocomposite synthesis method on the Congo red dye photodegradation under visible light irradiation
Publication date: Available online 13 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Wael A. Aboutaleb, Radwa A. El-SalamonyAbstractCongo red azo dye is a very toxic with large structure material which represents a serious hazard for the fresh water stream. This work aimed to investigate ceria and iron doped ceria nanocomposites activity in Congo red azo dye photodegradation under the visible light irradiation. The catalysts were prepared by the precipitation and modified sol-gel auto combustion methods. The obtained catalysts were characterized by high-resolution X-ray diffractometer, transmission electron mic...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

Characterization and hardness enhancement of amorphous Fe-based metallic glass laser cladded on nickel-free stainless steel for biomedical implant application
Publication date: Available online 14 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Mahmoud Z. Ibrahim, Ahmed A.D. Sarhan, T.Y. Kuo, Farazila Yusof, M. HamdiAbstractAmorphous metals – or Metallic Glass (MG) – have a great potential in bone implant applications because of their exceptional mechanical properties, excellent tribological and corrosion resistance characteristics, and good biocompatibility. An upcoming trend is to develop an amorphous metallic coating on different metallic alloys to promote the hardness of crystalline metallic alloys. In this work, Fe-based amorphous – FeCrMoCB &nd...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

The outstanding tensile strength of Ni-rich high entropy superalloys fabricated by powder metallurgical process
Publication date: Available online 12 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Byungchul Kang, Taeyeong Kong, Ho Jin Ryu, Soon Hyung HongAbstractThe present work reports the microstructure and tensile properties of a Ni-rich high-entropy superalloy (HESA; Ni46Co22Al12Cr8Fe8Ti3Mo1) having outstanding tensile properties, including yield strength of 1355 MPa and fracture elongation of 8.7 %. Powder metallurgical (PM) processes were used to fabricate the present HESA with homogeneous and fine-grained microstructure. A large number of γʹ precipitates were homogeneously distributed in a face-centered cub...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

Preparation and characteristics of porous magnesium phosphate cement modified by diatomite
Publication date: Available online 12 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Xuezhu Luan, Jinhong Li, Lijie Liu, Zhiwei YangAbstractAccording to reports, the porous magnesium phosphate materials had the disadvantage of short setting time which led to incomplete reaction with low strength and low porosity. In order to solve the problem of short reaction time and the relationship between strength and porosity, diatomite was added into this system. Diatomite/magnesium phosphate porous composite material (DM-MPPCM) was prepared by the pre-foaming method. The results revealed that the addition of DM prolonge...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

The effects of adding micro-scaled niobium carbide on the microstructure, mechanical strength and polarization resistance of the Ti-8Mo-4Co-xNbC composites
This studying examined the strengthening phase of thermo-stabilization after the heating process were simultaneously vacuum sintered at sintering temperatures of 1200, 1250 and 1300°C for one hour, respectively. Meanwhile, the relative density, apparent porosity, hardness and transverse rupture strength (TRS) and the microstructure were also examined. The results showed the hardness was enhanced slightly, however, the strength of alloys was enhanced by added niobium carbide as a reinforcing element effectively for increasing the mechanical properties of TRS from 1133.0 to 1229.7 MPa. Simultaneously, the volume shrinkag...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

Observation of Excitons at Room Temperature in ZnSxSe1-x Nanostructures Embedded in a Porous Al2O3 Template
Publication date: Available online 12 June 2019Source: Materials Chemistry and PhysicsAuthor(s): A.I. Chukavin, R.G. Valeev, A.N. BeltiukovAbstractThis work presents the phenomenon of dielectric confinement of the excitons of quasi-zero-dimensional nanostructures of a ZnSxSe1-x solid solution in a dielectric template of porous anodic aluminum oxide (AАО), which are synthesized by a simple method of vacuum thermal evaporation. The structures obtained possess stable excitons at room temperature with exciton binding energies ranging from 90 to 250 meV depending on composition and size of semiconductor nanostructures. The ph...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

Preparation and characterization of porous ceramics with low-grade diatomite and oyster shell
Publication date: Available online 12 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Liping Hao, Wenyuan Gao, Shuang Yan, Meihong Niu, Guishan Liu, Hongshun HaoAbstractPorous ceramics with the introduction of low-grade diatomite (LDE) and oyster shell (OS) were successfully fabricated via low-temperature sintering method. The micro-nano-sized OS powders were used as an excellent fluxing medium and pore-forming agent for ceramics. The physical and mechanical properties of porous ceramics were proved as a positive dependency with the mass ratio of OS powder and sintering temperature. When the mixing ratio of LDE ...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

Bio-synthesis of silver nanoparticles with antibacterial activity
Publication date: Available online 12 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Ren Yan-yu, Yang Hui, Wang Tao, Wang ChuangAbstractSilver nanoparticles (Ag-NPs) have potential applications in life science, food chemistry, biomedicine, photocatalysis and cosmetics fields due to its unique optical, electrical and catalytic properties besides the strong antibacterial property. Apple pomace, a by-product of apple juice production, is ample and easily available. In the present study, this green raw material was used to biosynthesize Ag-NPs for the first time. The obtained silver nanoparticles were investigated ...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

Simultaneous synthesis of various Sb2S3 nanostructures by vapor transport technique
In this study, we report the preparation of different Sb2S3 morphologies in the same experimental setup. We utilized the method of vapor phase transport with direct evaporation of high purity Sb2S3 powder on quartz and Si (100) substrates. The deposited Sb2S3 nanostructures showed different morphologies and crystallinities without using metal catalyst seed layers. The successfully formed Sb2S3 morphologies were nanowires, nanorods, nanodendrites and nanoparticles, as verified by the scanning electron microscopy and transmission electron microscopy analysis. We found that the physical characteristics of the final product ar...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

Attachment of redox active molecules on the carbon additive and its effect on the cycling performance of LiFePO4 electrodes
Publication date: Available online 13 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Hamidreza Saneifar, Nicolas Delaporte, Galyna Shul, Daniel BélangerAbstractThe bis(1,10-phenanthroline)-5-amino-1,10-phenanthroline iron complex (Fe2+[Phen]2[Phen-NH2]) was synthesized and characterized before covalent attachment to the surface of acetylene black carbon via diazonium chemistry. The metal complex was characterized by UV–visible spectroscopy and elemental analysis. Elemental analysis revealed a low grafting yield of approximately 3 wt%. Cycling voltammetry of modified-carbon electrode showed an app...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

Formation of TaB2 powders from high energy ball milling and borothermal reduction process
Publication date: Available online 13 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Kübra Gürcan, Erhan Ayas, Hakan GaşanAbstractTaB2 powders were fabricated at reduced temperatures via borothermal reduction route by high energy ball milling of Ta2O5 and B powder blends. The effects of milling media (Steel, ZrO2 and WC), milling time (1,3,5 and 7 h) and heat treatment temperature (1650°C and 1350°C) on the formation and microstructural characteristics of TaB2 and related phases were extensively investigated. Increasing the milling time up to 7h was found to be decreased the common formation ...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

Bioevaluation of 99mTc(I) Carbonyl-Radiolabeled aminoacid coated magnetic nanoparticles in vivo
Publication date: Available online 13 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Onur Büyükok, Eser Uçar, Çiğdem İçhedef, Oğuz Çetin, Serap TeksözAbstractIn this paper, amino acid coated and radiolabeled magnetic nanoparticles (MNPs) were prepared as a potential diagnostic agent. Magnetic nanoparticles were synthesized and functionalized by L-alanine and L-cysteine amino acids in one step. Besides surface functionalization, amino acid coating also provided favorable particle size. Structural characterization was performed by scanning electron microscopy. We obta...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

Effect of Nb precipitate on defect formation and migration energies in bi-crystalline Zr
Publication date: Available online 13 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Divya Singh, Avinash Parashar, Rajeev KapoorAbstractIn this article, molecular statics based simulations were performed to study the effect of Nb precipitate on the defect formation and migration energies in the bi-crystals of zirconium and niobium alloy (Zr–Nb). In order to resemble the experimentally observed configurations of grain boundaries in Zr, symmetrical and asymmetrical tilt grain boundaries were generated along [0001] as tilt axis. It has already been established that point defect formation energies are lower ...
Source: Materials Chemistry and Physics - June 14, 2019 Category: Materials Science Source Type: research

A Critical Review on Flexible Cu(In, Ga)Se2 (CIGS) Solar Cells
Publication date: Available online 11 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Yi-Chung Wang, Tsung-Ta Wu, Yu-Lun ChuehAbstractThe development of flexible Cu(In, Ga)Se2 (CIGS) solar cells opens new markets for indoor and outdoor applications, and thus has become one of the major directions for present research. Although the efficiency gap between glass and flexible substrates can now be reduced on a flexible polyimide through KF post-deposition treatment, it still seems difficult to transfer research-level technologies to industrial applications. Therefore, in this article, except for the progress made on...
Source: Materials Chemistry and Physics - June 12, 2019 Category: Materials Science Source Type: research

Amine activated diatom xerogel hybrid material for efficient removal of hazardous dye
This study showed that adsorbent DXEA was adequate to remove of 50 mg/L and 100 mg/L of aqueous EBT in 5 and 60 min of contact time respectively. The maximum dye adsorption capacity of DXEA was found to be ∼62 mg/g whereas for DE it was ∼56 mg/g. The dye adsorption kinetics of EBT onto both the DXEA and the DE follow the pseudo-second-order model. Also, DXEA was used for selective removal of EBT in the presence of other dyes and recycle studies were discussed. These studies show that DXEA is a promising material for EBT removal by adsorption in a real sample.Graphical abstract (Source: Materials Chemistry and Physics)
Source: Materials Chemistry and Physics - June 12, 2019 Category: Materials Science Source Type: research

Tailorable nano MgO.xAl2O3 spinel compositions along line of homogeneity via gel combustion route: Influence on phase evolution
Publication date: Available online 11 June 2019Source: Materials Chemistry and PhysicsAuthor(s): R. Halder, S. BandyopadhyayAbstractVery fine sized (∼5–15 nm) magnesium aluminate spinel (MgO.xAl2O3) powder of different degree of solid solubility (x = 1, 1.25, 1.50, 1.75, and 2) have been attempted for synthesis following a gel combustion method to meet its high demand in the fields of refractory, photo catalysis, sensor and strategic applications, etc. Nitrates of magnesium and aluminum were used as oxidants for exothermic reactions fuelled by urea added with formaldehyde solution acting as reductant. Therm...
Source: Materials Chemistry and Physics - June 12, 2019 Category: Materials Science Source Type: research

Structure, magnetic and catalytic properties of SiO2-MFe2O4 (M = Mn, Co, Ni, Cu) nanocomposites and their syntheses by a modified sol–gel method
Publication date: Available online 11 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Zbigniew S. Piskuła, Przemysław Skokowski, Tomasz Toliński, Michał Zieliński, Piotr Kirszensztejn, Waldemar NowickiAbstractThe structure, magnetic and catalytic properties of silica - ferrite nanocomposites were investigated. A series of SiO2-MFe2O4 (M = Mn, Co, Ni, Cu) composites were synthesized by a sol–gel technique using citric acid and glycerin. The samples were characterized by TGA, XRD, TEM and BET methods. Results of magnetization measurements proved a strong dependence of the saturation magnetization and th...
Source: Materials Chemistry and Physics - June 12, 2019 Category: Materials Science Source Type: research

The preparation of in-situ MoSi2-SiC-MoB three-phase composite completely eliminating the PEST phenomena
Publication date: Available online 11 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Zhang xiaoli, zhang xiaoyi, Duan jiawei, Kathy LuAbstractBecause of high melting point (2300 K), rather low density (6.28g/cm3) and excellent elevated oxidation resistance (above 1600 °C), MoSi2 have been treated to be one of the most attractive high temperature materials. However, thus a MoSi2 materials have their intrinsic limitations, one of the worst things is it suffered from an accelerated oxidation at low temperatures (between 350–550 °C) which was first discovered by Fitzer in 1955 and was named PEST oxida...
Source: Materials Chemistry and Physics - June 12, 2019 Category: Materials Science Source Type: research

Conducting, crystalline and electroactive polyaniline-Au nanocomposites through combined acid and oxidative doping pathways for biosensing applications: Detection of dopamine
Publication date: Available online 11 June 2019Source: Materials Chemistry and PhysicsAuthor(s): S. Mahalakshmi, V. SrideviAbstractAcid and oxidative doping pathways have been employed in synergy to synthesize polyaniline-gold (PANI-Au) nanocomposites using appropriate reagents and optimized synthesis procedures. Sulphuric and p-toluene sulphonic acids (pTSA) were used as protonic acid dopants and chloroauric acid as an oxidative dopant. The acid dopants enhanced the conductivity of polyaniline (PANI) while the oxidative dopant improved the crystallinity by oxidising the benzenoid units of PANI with a concomitant reduction...
Source: Materials Chemistry and Physics - June 12, 2019 Category: Materials Science Source Type: research

Size Control Synthesis of Pure Ni nanoparticles and Anodic-Oxidation of Butan-1-ol in Alkali.
Publication date: Available online 12 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Senjuti Banik, Ankita Mahajan, Swapan kumar BhattacharyaAbstractDifferent sets of nickel nanoparticles with confined average diameter in the range: 9.4 - 13.7 nm are synthesized by varying different parameters of wet chemical method to investigate the effects of such parameters on anode catalysis in oxidation of butan-1-ol in aqueous alkali. The structure and morphology of the synthesized nanoparticles and the role of Ni and its oxides as catalyst in the oxidation of butan-1-ol have been characterized by X-ray diffractometry, s...
Source: Materials Chemistry and Physics - June 12, 2019 Category: Materials Science Source Type: research

Natural oil derived carbon nano-onions as a sensitive electrocatalyst for nitrite determination
Publication date: Available online 12 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Aasiya Shaikh, Balwant Kr Singh, Smrutiranjan ParidaAbstractIn this communication, we report carbon nano-onions (CNOs) derived from natural oil as metal-free sensors for efficient nitrite determination. The pristine CNOs showed remarkable nitrite oxidation capability with a linear detection range of 1 μM to 90 μM (R2 = 0.998), the sensitivity of 214.29 μA mM-1 cm-2 and detection limit as low as 0.75 μM. The performance of this material exceed many well studied materials used as active materials for nitrite sensor.Gr...
Source: Materials Chemistry and Physics - June 12, 2019 Category: Materials Science Source Type: research

Characterization of interfacial behaviour of ortho-positioned diaryl disulfide on silver substrates by surface-enhanced Raman scattering and electroreduction
Publication date: Available online 10 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Ronghui Yuan, Huihui He, Jinfei Huang, Chang SuAbstractThe interfacial behaviour of ortho-positioned diaryl disulfide on activated silver substrates was characterized with surface-enhanced Raman scattering and electroreduction. After the fracture of the disulfide bond, the diaryl disulfides interacted with Ag to form self-assembled monolayers. The peak intensity of benzene ring deformation and pH-dependence presented two types of linear relationships. The probe molecule at pH 11.5 was used to estimate the Raman enhancement fact...
Source: Materials Chemistry and Physics - June 11, 2019 Category: Materials Science Source Type: research

Sol-gel synthesis of SiC@Y3Al5O12 composite nanopowder and preparation of porous SiC-ceramics derived from it
Publication date: Available online 10 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Elizaveta P. Simonenko, Nikolay P. Simonenko, Tatiana L. Simonenko, Anton V. Grishin, Kristina Yu Tal'skikh, Ekaterina A. Gridasova, Eugeniy K. Papynov, Oleg O. Shichalin, Vladimir G. Sevastyanov, Nikolay T. KuznetsovAbstractA sol-gel method with aluminium and yttrium alkoxoacetylacetonates as precursors was used to modify highly dispersed silicon carbide powder, with the formation of SiC@Y3Al5O12 with a low content of Y3Al5O12 ∼2 vol%. Two series of porous silicon carbide-based ceramics were produced by spark plasma sint...
Source: Materials Chemistry and Physics - June 11, 2019 Category: Materials Science Source Type: research

Calcium phosphate coating deposition by radio frequency magnetron sputtering in the various inert gases: The pilot study
In this study, thin calcium phosphate coatings were deposited on titanium substrates by radio frequency magnetron sputtering of hydroxyapatite target in the neon (Ne), argon (Ar), krypton (Kr) and xenon (Xe). The influence of the working gas (Ne, Ar, Kr and Xe) on the deposition rate, surface morphology, indentation hardness, Young's modulus and adhesion of the coatings was investigated. It was found that the calcium phosphate (CaP) coatings formed in Ar and Kr have a similar deposition rate. With an increase in the atomic weight of the working gas, the crystallite size of the coatings increases. The coatings deposited in ...
Source: Materials Chemistry and Physics - June 11, 2019 Category: Materials Science Source Type: research

Effective adsorption of Coomassie brilliant blue dye using poly(phenylene diamine)grafted electrospun carbon nanofibers as a novel adsorbent
Publication date: 15 May 2019Source: Materials Chemistry and Physics, Volume 234Author(s): Badr M. Thamer, Ali Aldalbahi, Meera Moydeen A, Hany El-Hamshary, Abdullah M. Al-Enizi, Mohamed H. El-NewehyAbstractGrafting of poly(para-, ortho- and meta-phenylenediamine (PPDA)) onto electrospun carbon nanofibers was performed via oxidative polymerization of o-, p-, m-PDA onto the surface of ECNFs to produce PPDA-g-ECNFs. The well characterized PPDA-g-ECNFs and their precursors were applied as effective nanoadsorbent for the removal of Coomassie brilliant blue R-250 (CBB) from aqueous solutions. The obtained results indicated that...
Source: Materials Chemistry and Physics - June 7, 2019 Category: Materials Science Source Type: research

An investigation of structural and magnetic properties of Ce-Nd doped strontium hexaferrite nanoparticles as a microwave absorbent
Publication date: Available online 6 June 2019Source: Materials Chemistry and PhysicsAuthor(s): M. khandani, M. Yousefi, S.S.S. Afghahi, M.M. Amini, M. Bikhof TorbatiAbstractCe-Nd-substituted M-type strontium hexaferrite nanoparticles, Sr(CeNd)x/2Fe12-xO19 (SCNH)(x=0, 0.5, 1, 1.5, 2) can be successfully synthesized using co-precipitation method. The synthesized nanocomposites are characterized by X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscope (FESEM), vibrating sample magnetometer (VSM). The vector network analyzer (VNA) were used to analyze microwave...
Source: Materials Chemistry and Physics - June 7, 2019 Category: Materials Science Source Type: research

Improving the mechanical properties and biocorrosion resistance of extruded Mg-Zn-Ca-Mn alloy through hot deformation
In this study, effect of hot deformation parameters such as temperature and strain rate on mechanical behavior and corrosion properties of Mg-4Zn-0.5Ca-0.75Mn alloy was investigated. Therefore, hot extrusion process at 450 °C with ratio of 12:1 and hot deformation tests at various conditions (300–450 °C and 0.001–1 s−1) were carried out to refine the grain size and improve both mechanical and corrosion properties of Mg-Zn-Ca-Mn alloy. Electrochemical tests were carried out in simulated body fluid (SBF) solution at room temperature using Ivium-n-Stat. The microstructural results and flow curves...
Source: Materials Chemistry and Physics - June 7, 2019 Category: Materials Science Source Type: research

Ionic liquids and cellulose: Innovative feedstock for synthesis of carbon nanostructured material
Publication date: Available online 5 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Kudzai Mugadza, Patrick G. Ndungu, Annegret Stark, Vincent O. NyamoriAbstractCarbon nanostructured materials (CNMs) have vast capability in the field of energy, for storage and conversion purposes. Consequently, extensive greener and environmentally benign synthesis techniques that employ natural and readily renewable, low-cost waste materials need to be established. Herein, cellulose is considered as an alternative precursor source for the synthesis of CNMs. In the past decade, ionic liquids (ILs) have exhibited a great potenti...
Source: Materials Chemistry and Physics - June 7, 2019 Category: Materials Science Source Type: research

Excess conductivity and AC susceptibility studies of Y-123 superconductor added with TiO2 nano-wires
Publication date: Available online 6 June 2019Source: Materials Chemistry and PhysicsAuthor(s): E. Hannachi, Y. Slimani, A. Ekicibil, A. Manikandan, F. Ben AzzouzAbstractWe have studied the impact of TiO2 nano-wires (NWs) used as additives on inter-granular and intra-granular coupling of YBa2Cu3O7-d (noted YBCO or Y-123) superconductor. Series of YBCO/(TiO2)x with 0 ≤ x ≤1 wt.% were made by solid-state reaction process. The crystal structure, morphology, microstructure and chemical compositions were methodically investigated using X-ray diffraction (XRD), scanning electron (SEM) and transmission electron (TEM) micros...
Source: Materials Chemistry and Physics - June 7, 2019 Category: Materials Science Source Type: research

Microstructure evolution and magnetic properties in Mn-rich Ni-(Co, Cu, Fe)-Mn-Sn Heusler base shape memory alloys
Publication date: Available online 6 June 2019Source: Materials Chemistry and PhysicsAuthor(s): P. Czaja, R. Chulist, A. Wierzbicka-Miernik, A. Brzoza, M. Fitta, W. MaziarzAbstractA prospective high temperature polycrystalline Ni50Mn44Sn6 Heusler shape memory alloy transforms at 637 K into 14M and NM martensites with a14M = 6.278, b14M = 6.127, c14M = 5.654; and aNM = 5.449, cNM = 6.380 Å lattice parameters, theoretically yielding 9.9% (14M) and 14.6% (NM) mechanically induced strain due to detwinning of martensite in single crystal. The substitution of Ni for Co, Cu and Fe (5 at.%) brings the martensitic transformat...
Source: Materials Chemistry and Physics - June 7, 2019 Category: Materials Science Source Type: research

Enhancement of relaxor behavior by La doping and its influence on the energy storage performance and electric breakdown strength of ferroelectric Pb(Zr0.52Ti0.48)O3 thin films
Publication date: Available online 4 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Ha T. Dang, Trang T. Trinh, Chi T.Q. Nguyen, Truong V. Do, Minh D. Nguyen, Hung N. VuAbstractLa-doped Pb1-xLax(Zr0.52Ti0.48)O3 (PLZT) thin films with dopant concentrations of up to 12% were fabricated on (111)Pt/Ti/SiO2/Si substrates by a sol-gel spin-coating method to investigate the effects of La content on the phase transition, ferroelectric and energy-storage performance properties of PZT thin films. The compositional-induced relaxor behavior was increased with the doping of La, due to the presence of polar nano-regions (PNR...
Source: Materials Chemistry and Physics - June 5, 2019 Category: Materials Science Source Type: research

Selective and sensitive detection of l-Cysteine via fluorometric assay using gold nanoparticles and Rhodamine B in aqueous medium
Publication date: Available online 4 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Pradip Maiti, Tanmoy Singha, Utsav Chakraborty, Sannak Dutta Roy, Parimal Karmakar, Bapi Dey, Syed Arshad Hussain, Sharmistha Paul, Pabitra Kumar PaulAbstractAn assay method based on fluorometric and colorimetric change was developed for selective sensing of important thiol containing amino acid l-Cysteine (L-Cys) by using gold nanoparticles (Au NPs) and Rhodamine B (RhB) in aqueous environment. This fluorometric assay is basically relies on the competitive binding between RhB and Au NPs via electrostatic interaction as well as ...
Source: Materials Chemistry and Physics - June 5, 2019 Category: Materials Science Source Type: research

Role of amoxicillin in enhancing AZ31 alloy degradation resistance and its monitoring using nano-Pd electrochemical sensor
Publication date: Available online 4 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Fakiha El-Taib Heakal, Amira M. BakryAbstractMagnesium materials exhibit promising prospects in clinical applications due to their biodegradability. Herein AZ31 magnesium alloy sample is scrutinized as a potential example of a biodegradable ureteral stent material in artificial urine (AU) without and with different doses from amoxicillin (AMX). The study is carried out using open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) measurements. The results disclose that AM...
Source: Materials Chemistry and Physics - June 5, 2019 Category: Materials Science Source Type: research

A conditional justification for the determination of surface energy of solids using contact angle methods
We present a conditional justification for determining the surface energy (SE) of solids from contact angle (CA) methods using a proof with illustrations. To validate our observations, we compared the SEs of some materials from literature estimated using CA models (Owens-Wendt, Van Oss-Good-Chaudhury equation, Wu's equation, Lifshitz-van der Waals and Lewis acid-base, Girifalco) and other approaches such as thermodynamic methods, density functional theory, experimental or cleaving techniques. Results from literature have reported tens of mJm−2 and a few Jm−2 for the same materials determined using CA and other ...
Source: Materials Chemistry and Physics - June 5, 2019 Category: Materials Science Source Type: research

Luminescent cotton fibers coated with fluorescein dye for anti-counterfeiting applications
We report the application of fluorescein (FL) into textile support by impregnation method while keeping the original cotton yarn properties for anti-counterfeiting applications. The FL-coated yarns were characterized by Scanning Electron Microscopy, reflectance and fluorescence spectroscopy. The CIE chromaticity diagram showed a yellowish green emission with a weak yellow coloration of cotton fiber. Mechanical characterization of samples shows that the application of fluorescein did not alter significantly the breaking strength and elongation at break of the fibers, even when using resins. In contrast, to resin-free impreg...
Source: Materials Chemistry and Physics - June 5, 2019 Category: Materials Science Source Type: research

Effect of Fe2O3, V2O5 and vanadium slag on the corrosion of NiAl2O4 spinel.
Publication date: Available online 5 June 2019Source: Materials Chemistry and PhysicsAuthor(s): B. Fernández Arguijo, A. Contreras Briseño, E.J. Gutiérrez Castañeda, J.M. Almanza RoblesAbstractThe aim of the present work is to study the corrosion of NiAl2O4 spinel by V2O5, Fe2O3 and vanadium slag. Samples of NiAl2O4 spinel with the oxides mentioned above were heated at 10ºC/min from room temperature up to 1500ºC. Holding time was 12 h and cooling rate was 10ºC/min. The effects of these oxides on the corrosion of NiAl2O4 spinel were simulated at the beginning with HSC®5.1 softw...
Source: Materials Chemistry and Physics - June 5, 2019 Category: Materials Science Source Type: research

Investigations on the structural, optical and electrical properties of InxGa1-xN Thin Films
Publication date: Available online 5 June 2019Source: Materials Chemistry and PhysicsAuthor(s): C. Bagavath, J. KumarAbstractWe have investigated on the growth of InxGa1-xN thin films on silicon (100) substrate at different temperatures via nitridation of the deposited indium gallium oxide. The estimation from X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) studies clearly shows the presence of indium rich content of about 30 % in the grown InxGa1-xN thin films. The A1(LO) phonon peak in micro-Raman scattering at 670 cm-1 correlates that the films are crystallized in the characteristic wurtzite structure...
Source: Materials Chemistry and Physics - June 5, 2019 Category: Materials Science Source Type: research

The effects of Pr3+ doping on the dielectric and photoluminescence properties of BaTi0.9(Yb0.5Nb0.5)0.1O3 ceramic
Publication date: Available online 5 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Zied Abdelkafi, Olivier Bidault, Issa Kriaa, Hanen AbdmoulehAbstractThe praseodymium Pr3+ doped BaTi0.9(Yb0.5Nb0.5)0.1O3 (BTYN01) ceramic, under low concentration (0.1%), was prepared by a conventional ceramic fabrication technique and its phase structure, microstructure, dielectric, vibrational and photoluminescence (PL) properties was studied. Both X-ray diffraction (XRD) and Raman studies confirmed the incorporation of Pr3+ into A-site lattice of BTYN01. The structure of Ba0.9985Pr0.0010.0005Ti0.9(Yb0.5Nb0.5)0.1O3 (BTYN01-Pr)...
Source: Materials Chemistry and Physics - June 5, 2019 Category: Materials Science Source Type: research

Fabrication, characterization and in vitro cell study of gelatin-chitosan scaffolds: New perspectives of use of aloe vera and snail mucus for soft tissue engineering
Publication date: Available online 5 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Daniel Enrique López Angulo, Carlos Eduardo Ambrosio, Rodrigo Lourenço, Natalia Juliana Nardelli Gonçalves, Fabio Sergio Cury, Paulo José do Amaral SobralAbstractBurn lesions are frequently occurring injuries that exhibit poor healing ability. Scaffolds play a critical role in the reconstruction of damaged living tissue. The present study aimed to assess the effect of different gelatin-chitosan ratios of scaffold forming suspensions (SFS) on some physical properties of theses suspensions and on their ...
Source: Materials Chemistry and Physics - June 5, 2019 Category: Materials Science Source Type: research

A novel functionalized SiO2-based support prepared from biomass waste for lipase adsorption
In this study, a novel support (Phenyl–SiO2) has been prepared via functionalization of rice husk silica (RHS) with triethoxy(phenyl)silane. For such a purpose, the functionalized support was used to immobilize lipase from Thermomyces lanuginosus (TLL) by physical adsorption via hydrophobic interactions. Introduction of phenyl groups on the support surface has been confirmed by SEM, TEM, AFM, B.E.T. and elemental analysis. Maximum immobilized protein concentration of 27.7 ± 2.3 mg/g was achieved using an initial protein loading of 40 mg/g. The catalytic activity of the prepared biocatalyst was assayed by olive...
Source: Materials Chemistry and Physics - June 4, 2019 Category: Materials Science Source Type: research

Effective stress transferring interface and mechanical property enhancement of poly(L-lactide)/multi-walled carbon nanotubes fibers
Publication date: Available online 4 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Qi-hao Yu, Fan Zhu, Juan-juan Su, Jian HanAbstractThe poly(L-lactide) grafted multi-walled carbon nanotubes (MWNT-g-PLLA) was firstly prepared, and a maximum grafting amount of 31wt% was obtained by optimizing grafting reaction conditions. Then the PLLA/MWNT-g-PLLA composite fibers were fabricated by melt spinning, and showed significant enhancement of tensile strength and elongation at break, comparing with the unmodified PLLA/MWNTs or pure PLLA ones. Structure analysis of as-spun fibers revealed uniform dispersion of MWNT-g-PL...
Source: Materials Chemistry and Physics - June 4, 2019 Category: Materials Science Source Type: research

Conductivity behavior and impedance studies in BaTiO3–CoFe2O4 magnetoelectric composites
Publication date: Available online 1 June 2019Source: Materials Chemistry and PhysicsAuthor(s): S.Shankar, O.P. Thakur, M. JayasimhadriAbstractTwo phase magneto-dielectric composite of Barium titanate and Cobalt ferrite (BT-CFO) has been prepared via solid state reaction technique. The structure has been investigated by Raman spectroscopy and confirms the presence of composite phase. Electrical properties of BT-CFO composites were studied thoroughly in 100 Hz to 1 MHz frequency range and in 50 °C–450 °C temperature range. The dielectric measurements reveal Maxwell-Wagner polarization and thermal activ...
Source: Materials Chemistry and Physics - June 2, 2019 Category: Materials Science Source Type: research

Shrinkage, hardness and fracture toughness of ternary ZrB2–SiC-HfB2 composite with different amount of HfB2
Publication date: Available online 1 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Zohre BalakAbstractTernary ZrB2–SiC-HfB2 composites with different amount of 4, 8 and 12 vol% HfB2 were consolidated at 1800 °C, 9 min and 30 MPa SPS conditions. Microstructural evaluations were done by scanning electron microscopic (SEM). Densification was measured by Arashmidous method. Fracture toughness was determined by crack length measurement. Macro-hardness (Hv30.0) was measured by a Vickers indenter with 30 kg as applied load for 20 s on polished sections. The results showed with HfB2 ascent up to ...
Source: Materials Chemistry and Physics - June 1, 2019 Category: Materials Science Source Type: research

Complex Permittivity and Microwave Heating Behavior of Rod-Shaped SiC and Oxide (SiO2, Al2O3) Mixtures
Publication date: Available online 1 June 2019Source: Materials Chemistry and PhysicsAuthor(s): Noboru Yoshikawa, Kohsaku Seki, Naoki Inoue, Sergey Komarov, Kei-ichirou Kashimura, Takashi Fujii, Hideoki FukushimaAbstractPermittivity measurement and microwave heating characteristics of rod-shaped SiC (fragmented SiC fiber) mixed with SiO2 or Al2O3 were investigated, comparing with the mixtures of other two kinds of SiC materials. Rod-shaped SiC mixtures had larger permittivity (both real and especially imaginary parts) than the other SiC mixtures, and a broad peak of loss factor (εr”) appeared around 1GHz. Eff...
Source: Materials Chemistry and Physics - June 1, 2019 Category: Materials Science Source Type: research

Simultaneous electrochemical determination of catechol and hydroquinone in seawater using Co3O4/MWCNTs/GCE
Publication date: Available online 30 May 2019Source: Materials Chemistry and PhysicsAuthor(s): Yawen Song, Minggang Zhao, Xingtao Wang, Huiyan Qu, Ying Liu, Shougang ChenAbstractThe multi-walled carbon nanotubes decorated with Co3O4 nanoparticles (Co3O4/MWCNTs) were successfully prepared by the hydrothermal method. A facile and practical electrochemical sensor based on Co3O4/MWCNTs was established for simultaneous detection of hydroquinone (HQ) and catechol (CC) by differential pulse voltammetry (DPV). The defined and separated oxidation peaks of a mixture of HQ and CC were obtained at pH 8.0, owing to the catalytic stabi...
Source: Materials Chemistry and Physics - June 1, 2019 Category: Materials Science Source Type: research

Zn and Sr co-doped TiO2 mesoporous nanospheres as photoanodes in dye sensitized solar cell
Publication date: Available online 30 May 2019Source: Materials Chemistry and PhysicsAuthor(s): R. Sankar Ganesh, Aamir.Y. Mamajiwala, E. Durgadevi, M. Navaneethan, S. Ponnusamy, C.Y. Kong, C. Muthamizhchelvan, Y. Shimura, Y. HayakawaAbstractMesoporous TiO2 nanospheres that were co-doped with Zn and Sr were synthesized via a simple hydrothermal method. These materials were used as the photoanode in dye-sensitized solar cells (DSSCs). Field-emission electron microscopy showed that the nanospheres were monodisperse and interconnected, while transmission electron microscopy (TEM) showed that the nanospheres were composed of d...
Source: Materials Chemistry and Physics - June 1, 2019 Category: Materials Science Source Type: research

Effective adsorption of Coomassie brilliant blue dye using Poly (phenylene diamine) grafted electrospun carbon nanofibers as a novel adsorbent
Publication date: Available online 31 May 2019Source: Materials Chemistry and PhysicsAuthor(s): Badr M. Thamer, Ali Aldalbahi, Meera Moydeen A, Hany El-Hamshary, Abdullah M. Al-Enizi, Mohamed H. El-NewehyAbstractGrafting of poly(para-, ortho- and meta-phenylenediamine (PPDA)) onto electrospun carbon nanofibers was performed via oxidative polymerization of o,p, m PDA onto the surface of ECNFs to produce PPDA-g-ECNFs. The well characterized PPDA-g-ECNFs and their precursors were applied as effective nanoadsorbent for the removal of Coomassie brilliant blue R-250 (CBB) from aqueous solutions. The obtained results indicated th...
Source: Materials Chemistry and Physics - June 1, 2019 Category: Materials Science Source Type: research

Facile fabrication of α-Fe2O3/porous g-C3N4 heterojunction hybrids with enhanced visible-light photocatalytic activity
Publication date: Available online 31 May 2019Source: Materials Chemistry and PhysicsAuthor(s): Jirong Bai, Haiyang Xu, Gang Chen, Wenhua Lv, Zhijiang Ni, Zhilei Wang, Jiaying Yang, Hengfei Qin, Zheng Zheng, Xi LiAbstract:α-Fe2O3/porous g-C3N4 (α-Fe2O3/PCN) photocatalysts were fabricated via a facile and green method. Structural characterization indicated α-Fe2O3 nanoparticles were successfully loaded onto PCN. The α-Fe2O3/PCN nanocomposites were proven durable with significantly enhanced photocatalytic activity for Rhodamine B photodegradation than the single components under visible light irradiat...
Source: Materials Chemistry and Physics - June 1, 2019 Category: Materials Science Source Type: research