Enhanced room-temperature ferromagnetism of Co-doped SnO2 nanostructures produced by the hydrothermal method
Publication date: Available online 23 April 2019Source: Materials Research BulletinAuthor(s): Tatyana Zima, Natalia BulinaAbstractIn this work, Co-doped SnO2 powders were synthesized via a simple hydrothermal process without using any surfactants. A detailed microstructural analysis showed that incorporation of Cо (II) ions distorts the SnO2 lattice. The unit cell volume becomes smaller as the nominal Co content increases. Neither segregated secondary phases nor the Co-rich clusters were detected. The particles of Co-doped SnO2 self-assembled from low-dimensional building blocks and acquired a three-dimensional hierarchic...
Source: Materials Research Bulletin - April 24, 2019 Category: Materials Science Source Type: research

Enhanced open-circuit photovoltage and charge collection realized in pearl-like NiO/CuO composite nanowires based p-type dye sensitized solar cells
Publication date: August 2019Source: Materials Research Bulletin, Volume 116Author(s): Rou Tan, Zengxi Wei, Jiaojiao Liang, Zhigang Lv, Bo Chen, Jie Qu, Weibo Yan, Jianmin MaAbstractLow open-circuit photovoltage and poor hole transfer character of semiconductors have limited the development of p-type dye-sensitized solar cells (p-DSSCs) owing to the minor energy-gap between the conduction band of NiO and the Nernstian potential of the I3−/I− electrolyte, as well as the low intrinsic hole-conductivity of NiO semiconductor. Hereby, a novel NiO/CuO nanocomposite was well-designed and successfully fabricated as pho...
Source: Materials Research Bulletin - April 24, 2019 Category: Materials Science Source Type: research

Synthesis of bimetallic CoMn–alginate and synergistic effect on thermal decomposition of ammonium perchlorate
Publication date: September 2019Source: Materials Research Bulletin, Volume 117Author(s): Yuewen Lu, Ruihao Wang, Jiexin He, Pengfei Xu, Hua Li, Lu Tian, Changping GuoAbstractAn excellent material for thermal decomposition of ammonium perchlorate (AP) is urgently required. Herein, inspired by natural biopolymer, we prepared CoMn–alginate/AP composite by air atomization method. The results clearly indicated that the bimetallic CoMn–alginate had a 3D network structure consisting of pores and some thin nanosheets. With increasing temperature, the bimetallic CoMn–alginate was decomposed and formed MnCo2O4 nan...
Source: Materials Research Bulletin - April 24, 2019 Category: Materials Science Source Type: research

BiVO4/TiO2 heterojunction with enhanced photocatalytic activities and photoelectochemistry performances under visible light illumination
Publication date: Available online 22 April 2019Source: Materials Research BulletinAuthor(s): Yan-Ran Lv, Chao-Jun Liu, Run-Kai He, Xin Li, Yue-Hua XuAbstractThe heterostructured BiVO4/TiO2 composites were fabricated by a hydrothermal method using hexadecyl trimethyl ammonium bromide as dispersant. The coupling of BiVO4 and TiO2 notably enhanced the photocatalytic activity of RhB degradation under visible light irradiation. The degradation rate constant (k) of 74.4%BiVO4/TiO2 reached to 10.5 and 4 times as much as those of TiO2 and BiVO4, respectively. Based on the calculation and experimental results, a possible mechanism...
Source: Materials Research Bulletin - April 23, 2019 Category: Materials Science Source Type: research

Synthesis of bimetallic CoMn-alginate and synergistic effect on thermal decomposition of ammonium perchlorate
Publication date: Available online 20 April 2019Source: Materials Research BulletinAuthor(s): Yuewen Lu, Ruihao Wang, Jiexin He, Pengfei Xu, Hua Li, Lu Tian, Changping GuoAbstractAn excellent material for thermal decomposition of ammonium perchlorate (AP) is urgently required. Herein, inspired by natural biopolymer, we prepared CoMn–alginate/AP composite by air atomization method. The results clearly indicated that the bimetallic CoMn–alginate had a 3D network structure consisting of pores and some thin nanosheets. With increasing temperature, the bimetallic CoMn–alginate was decomposed and formed MnCo2O4...
Source: Materials Research Bulletin - April 21, 2019 Category: Materials Science Source Type: research

Green one-pot synthesis of gold nanoparticles using Sansevieria roxburghiana leaf extract for the catalytic degradation of toxic organic pollutants
Publication date: Available online 20 April 2019Source: Materials Research BulletinAuthor(s): Indramani Kumar, Moumita Mondal, Vadivel Meyappan, Natarajan SakthivelAbstractBiogenic gold nanoparticles were synthesized using aqueous solution of Sansevieria roxburghiana leaf extract. Optimum synthesis of gold nanoparticles was observed at 2 mM concentration of chloroauric acid and the reaction was completed by 60 min at 40 °C. The biomolecules, proteins and polyphenols present in the leaf extract were involved in the bioreduction of chloroauric acid. The synthesized gold nanoparticles were characteriz...
Source: Materials Research Bulletin - April 21, 2019 Category: Materials Science Source Type: research

Enhanced photocatalytic activities of CdS-BiOCl/PAN composites towards photocatalytic hydrogen evolution
Publication date: Available online 19 April 2019Source: Materials Research BulletinAuthor(s): Qinyu Zhang, Guanqiong Li, Jie Bai, Ruifang He, Chunping LiAbstractIn this work, we successfully synthesized a series of CdS-BiOCl/PAN composites by two-step method including electrospinning process and hydrothermal process. The CdS-BiOCl/PAN composites showed great photocatalytic performance and chemical stability for H2 production under UV-visible light irradiation due to the synergistic effect among CdS, BiOCl and PAN. Meanwhile, the content of CdS in CdS-BiOCl/PAN composites plays an important role in photo-catalytic abilities...
Source: Materials Research Bulletin - April 21, 2019 Category: Materials Science Source Type: research

Editorial Board
Publication date: July 2019Source: Materials Research Bulletin, Volume 115Author(s): (Source: Materials Research Bulletin)
Source: Materials Research Bulletin - April 21, 2019 Category: Materials Science Source Type: research

Nano-porous sol-gel derived hydrophobic glass coating for increased light transmittance through greenhouse
Publication date: Available online 17 April 2019Source: Materials Research BulletinAuthor(s): Tania Dey, Daragh NaughtonAbstractThis paper reports an acid catalyzed sol-gel formulation with tetraethyl orthosilicate (TEOS) as a precursor for developing nano-porous anti-reflective coating on glass. The novelty of this formulation lies in judicious choice of ingredients. Oxalic acid, an unconventional acid catalyst created nano-pores of average diameter 1.25 µm due to entrapped carbon dioxide, which in turn increased the light transmittance by 7.01%. Carboxymethyl cellulose, a biopolymer fiber of 221 nm di...
Source: Materials Research Bulletin - April 18, 2019 Category: Materials Science Source Type: research

Nonlinear current-voltage and giant dielectric properties of Al3+ and Ta5+ co-doped TiO2 ceramics
Publication date: Available online 16 April 2019Source: Materials Research BulletinAuthor(s): Wattana Tuichai, Supamas Danwittayakul, Narong Chanlek, Prasit ThongbaiABSTRACTThe nonlinear current-voltage and dielectric properties of (Al3++Ta5+) co-doped TiO2 (ATTO) ceramics are represented. Microstructural analysis reveals that sintered ceramics are highly dense and non-porous. ATTO ceramics exhibit low loss tangent (tanδ
Source: Materials Research Bulletin - April 18, 2019 Category: Materials Science Source Type: research

Towards low cost fabrication of inorganic white light emitting diode based on electrodeposited Cu2O thin film/TiO2 nanorods heterojunction
Publication date: Available online 16 April 2019Source: Materials Research BulletinAuthor(s): Abdelhamid El-Shaer, Walid Ismail, Mahmoud AbdelfatahAbstractEmploying low cost hydrothermal and electrodeposition methods is one of the keys to minimize the high cost fabrication of inorganic LEDs. Therefore, we are presenting here for the first time the synthesis of TiO2 nanorods/Cu2O thin film heterojunction employing these methods to fabricate LED. The crystal structure, the optical and the morphology properties of grown samples and the diode device was investigated employing Uv-vis spectroscopy, X-ray diffraction, photolumine...
Source: Materials Research Bulletin - April 18, 2019 Category: Materials Science Source Type: research

Facile synthesis of rod-like nickel-cobalt oxide nanostructure for supercapacitor with excellent cycling stability
Publication date: Available online 16 April 2019Source: Materials Research BulletinAuthor(s): Shuqing Dang, Zhuo Wang, Wei Jia, Yali Cao, Juanli ZhangAbstractNickel-cobalt oxide as a class of transition metal oxide has been extensively recognized as an excellent pseudocapacitive material for supercapacitor due to its high specific capacitance and good rate capability compared with single components. Herein, porous rod-like NiCo2O4 nanostructures have been obtained through water-glycol mixed solvothermal method with subsequent calcination treatment. The as-prepared NiCo2O4 electrode materials exhibit high specific capacitan...
Source: Materials Research Bulletin - April 18, 2019 Category: Materials Science Source Type: research

Open-circuit Photovoltage and Charge Collection Realized in Pearl-like NiO/CuO Composite Nanowires Based p-Type Dye Sensitized Solar CEnhanced open-circuit photovoltage and charge collection realized in pearl-like NiO/CuO composite nanowires based p-type dye sensitized solar cells
Publication date: Available online 17 April 2019Source: Materials Research BulletinAuthor(s): Rou Tan, Zengxi Wei, Jiaojiao Liang, Zhigang Lv, Bo Chen, Jie Qu, Weibo Yan, Jianmin MaAbstractLow open-circuit photovoltage and poor hole transfer character of semiconductors have limited the development of p-type dye-sensitized solar cells (p-DSSCs) owing to the minor energy-gap between the conduction band of NiO and the Nernstian potential of the I3-/I-−/I− electrolyte, as well as the low intrinsic hole-conductivity of NiO semiconductor. Hereby, a novel NiO/CuO nanocomposite was well-designed and successfully fabric...
Source: Materials Research Bulletin - April 18, 2019 Category: Materials Science Source Type: research

Color tunability and energy transfer studies of Dy3+/ Eu3+ co-doped calcium aluminozincate phosphor for lighting applications
Publication date: Available online 15 April 2019Source: Materials Research BulletinAuthor(s): Sumandeep Kaur, A.S. Rao, M. JayasimhadriAbstractDy3+ doped and Dy3+/Eu3+ co-doped calcium aluminozincate (CAZ) phosphor synthesized by Pechini sol-gel method. Structural and morphological analysis was carried out by using X-ray diffractometer (XRD) and field emission scanning electron microscope (FE-SEM). The photoluminescent (PL) spectra were recorded and energy transfer mechanism between Dy3+ and Eu3+ ions were studied using Dexter and Reisfeld’s approximation. The colorimetric properties were studied by evaluating CIE co...
Source: Materials Research Bulletin - April 16, 2019 Category: Materials Science Source Type: research

Comparison of Local Crystal Structure and Magnetic Properties of Cation substituted LiNiO2 Compositions
Publication date: Available online 13 April 2019Source: Materials Research BulletinAuthor(s): M K Majee, A K Nigam, P A BhobeAbstractWe investigate the change in local crystal structure and its impact on the magnetic ground states of LiNi0.5X0.5O2 (X = Mn, Co) and LiNi0.75Y0.25O2 (Y = Fe, Al) and contrast it against LiNiO2. The solid-state synthesis route adopted here introduces some anti-site disorder in the final compositions due to the volatile nature of Li ions. Powder X-ray diffraction (XRD) profiles were hence recorded using a rotating anode X-ray source to determine the percentage of anti-site disorder, and phase pu...
Source: Materials Research Bulletin - April 15, 2019 Category: Materials Science Source Type: research

Hydrothermal Method to Prepare Ce-doped BiOBr Nanoplates with Enhanced Carrier Transfer and Photocatalytic Activity
Publication date: Available online 13 April 2019Source: Materials Research BulletinAuthor(s): Miao Hu, Aihua Yan, Xinyang Wang, Fei Huang, Qiaopeng Cui, Fan Li, Ji HuangAbstractCe-doped bismuth oxybromide (BiOBr) nanoplates were successfully synthesized by a facile hydrothermal method. The phase, composition, chemical state, microstructures, spectrum response, band gap, electron transfer and photocatalytic activity were analyzed in detail by a series of advanced tools. The results indicated that Ce3+ ions were successfully incorporated into the crystal lattice of BiOBr. With the increase of Ce-doped amounts, the morphology...
Source: Materials Research Bulletin - April 15, 2019 Category: Materials Science Source Type: research

Tolerance factor as the basic criterion in searching for promising oxygen-ion and proton conductors among Ln2-xDxM2O7-δ (Ln = La-Lu; M= Sn, Ti, Zr, Hf; D= Sr, Ca, Mg; x = 0, 0.1) 3+/4+ pyrochlores
Publication date: Available online 13 April 2019Source: Materials Research BulletinAuthor(s): V. Shlyakhtina, K.S. PigalskiyAbstractA criterion has been proposed for searching for promising solid oxide fuel cell materials among Ln2-xDxM2O7-δ (Ln = La-Lu; M = Ti, Zr, Hf; D = Sr, Ca, Mg; x = 0, 0.1) pyrochlores using a geometric parameter characterizing the pyrochlore structure (tolerance factor G). Analysis of a large amount of experimental oxygen ion and proton conductivity data has made it possible to identify general trends in the behavior of the transport pro...
Source: Materials Research Bulletin - April 15, 2019 Category: Materials Science Source Type: research

Vertically Aligned Ultrathin MoSe2 Nanoflakes Grown on Carbon Cloth and its Field Emission Behaviour
Publication date: Available online 12 April 2019Source: Materials Research BulletinAuthor(s): Pravin R. Dusane, Balu R. Thombare, Prashant K. Bankar, Gaurav Lole, Dnyaneshwar Gavhane, Chaitali V. Khedkar, Bhagyashree Nagrare, Ashwini Salunkhe, Pankaj Kolhe, Ram J. Choudhary, D.M. Phase, Mahendra A. More, Shankar I. PatilAbstractIn this paper, MoSe2 nanoflakes on carbon cloth (MS-C) and MoSe2 powder (MS-P) were synthesized by facile hydrothermal route. The synthesized MoSe2 nanoflakes, owing to their high aspect ratio, are envisaged as potential candidates for field emitters. Accordingly, field emission (FE) characteristics...
Source: Materials Research Bulletin - April 13, 2019 Category: Materials Science Source Type: research

Flower-like nickel-cobalt oxide nanomaterials as bi-functional catalyst for electrochemical water splitting
Publication date: Available online 12 April 2019Source: Materials Research BulletinAuthor(s): Rajasekaran Elakkiya, Rajendran Ramkumar, Govindhan MaduraiveeranAbstractHerein, we demonstrate a highly efficient and stable bi-functional electrode based on flower-like hierarchical nanoporous nickel-cobalt oxide (NP-NiCo2O4) material for electrochemical water splitting reactions. The as-synthesized spinel crystalline nanoporous-NiCo2O4 material enables improved electrocatalytic activity towards both water oxidation and reduction by taking the advantageous of hierarchical nanoporous structure, improved active sites, and electroc...
Source: Materials Research Bulletin - April 12, 2019 Category: Materials Science Source Type: research

Site occupancy and luminescence of Ce3+ ions in whitlockite-related strontium lutetium phosphate
Publication date: Available online 10 April 2019Source: Materials Research BulletinAuthor(s): Yongqiang Geng, Qiufeng Shi, Fangtian You, Konstantin V. Ivanovskikh, Ivan I. Leonidov, Ping Huang, Lei Wang, Yue Tian, Yan Huang, Cai’e CuiAbstractCe3+-doped Sr9Lu(PO4)7 polycrystalline material has been synthesized using a solid state reaction at high temperature. Luminescence spectroscopic properties and emission decay dynamics have been studied upon UV-VUV excitation. Emission from Ce3+ ions located in two types of crystallographic sites has been identified in low temperature spectra. Ce3+ ions have been shown to prefer ...
Source: Materials Research Bulletin - April 12, 2019 Category: Materials Science Source Type: research

Efficient CO (carbon monoxide) oxidation using gold catalysts supported on WO3/titanate protonated nanotubes
Publication date: July 2019Source: Materials Research Bulletin, Volume 115Author(s): R. Camposeco, S. Castillo, M. Hinojosa-Reyes, N. Nava, R. ZanellaAbstractWO3/titanate protonated nanotubes used to disperse gold nanoparticles were prepared by the deposition-precipitation with urea method and tested in CO oxidation reaction. Remarkably enhanced CO oxidation activity was achieved with the addition of gold nanoparticles with respect to WO3/NT and Au/NT catalysts. XPS and H2/TPR showed that when the samples were activated at 400 °C under hydrogen treatment, gold was present in the metallic Au0 form and tungsten as...
Source: Materials Research Bulletin - April 11, 2019 Category: Materials Science Source Type: research

Photodeposition of gold nanoparticles on ZnS nanobelts for enhanced dye decomposition
Publication date: Available online 8 April 2019Source: Materials Research BulletinAuthor(s): Sooho Ham, Dayeon Choi, Du-Jeon JangABSTRACTGold nanoparticles have been produced on the surfaces of ZnS nanobelts via direct reduction during a photodeposition process. Because the gold nanoparticles have been fabricated in the absence of any reducing agents or surfactants, charge-separating junctions between gold and ZnS have been effectively produced. As the wt% of surface-decorating gold nanoparticles increases, the photoexcited charges of ZnS nanobelts can be separated efficiently. This has been demonstrated by monitoring phot...
Source: Materials Research Bulletin - April 9, 2019 Category: Materials Science Source Type: research

Viscosity decoupled charge transport in surface functionalized ZnS nanoparticle dispersed imidazolium ionanofluids
Publication date: Available online 6 April 2019Source: Materials Research BulletinAuthor(s): Debalina Deb, Bula Dutta, Subhratanu BhattacharyaAbstractThe mechanism of charge transport in ionic liquid functionalized ZnS nanoparticles dispersed imidazolium-based ionanofluids are investigated combining impedance spectroscopy, viscosity measurement and differential scanning calorimetry. The viscosity enhances from 76 mPa. S to 229 mPa. S at room temperature in 0 to 20 wt% of functionalised nanoparticles addition in the ionic liquid. The conductivity and permittivity spectra are dominated on the low-freque...
Source: Materials Research Bulletin - April 7, 2019 Category: Materials Science Source Type: research

The synergistic effect of fluorination and embedded SnO2 on the NO gas sensing of expanded graphite
Publication date: Available online 6 April 2019Source: Materials Research BulletinAuthor(s): Min Il Kim, Kyung Hoon Kim, Min Ji Kim, Jong Gu Kim, Young-Seak LeeAbstractTo achieve high-performance nitric oxide (NO) gas sensing, expanded graphite (EG) was modified with SnO2 and fluorine functional groups. SnO2 was introduced into EG with an aqueous solution of SnCl2, whereas the fluorine functional groups were introduced via fluorine gas. The properties of the samples were analyzed by field-emission scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and NO gas sensing. A SnO2 phase from the SnC...
Source: Materials Research Bulletin - April 7, 2019 Category: Materials Science Source Type: research

Non-noble metal Co as active sites on TiO2 nanorod for promoting photocatalytic H2 production
Publication date: Available online 6 April 2019Source: Materials Research BulletinAuthor(s): Wei Chen, Mei Liu, Yanhong Wang, Li Gao, Haifeng Dang, Liqun MaoAbstractNon-noble metal Co was decorated on TiO2 nanorod by a photodeposition method to improve photocatalytic H2 production. Co particles with ca. 7nm diameter dispersed well onto the TiO2 nanorods. Photocatalytic H2 production performance of Co/TiO2 was tested and the results showed that the photocatalytic activity was promoted by Co loading. The H2 evolution rate of 2.0 wt% Co/TiO2 (839.8 μmol⋅h-1) is 8.9 times of that of bare TiO2 (95 μmol⋅h-1), rea...
Source: Materials Research Bulletin - April 7, 2019 Category: Materials Science Source Type: research

Highly efficient CaCO3-CaO extracted from tap water distillation for effective adsorption and photocatalytic degradation of malachite green dye
This study describes the adsorption and photocatalytic properties of hardness causing material (HCM) under sunlight radiation. It was observed that HCM powder exhibited superior adsorption and photodegradation of malachite green dye compared to commercial available calcium oxide. (Source: Materials Research Bulletin)
Source: Materials Research Bulletin - April 7, 2019 Category: Materials Science Source Type: research

In-situ growth of ZIF-8 nanocrystals to prepare cotton-based composites with dye degradation and antibacterial abilities
Publication date: Available online 5 April 2019Source: Materials Research BulletinAuthor(s): Zhou Lan, Chunmei Wang, Jiangang QuAbstractDeveloping new type of environmental purification materials and antibacterial materials is of great significance. Herein, a novel cotton fiber (CF) based composite CF@ZIF-8 was designed by in-situ growth strategy and was applied in the photocatalytic degradation and antibacterial. Reactive Black KN-B (RB5) was used as a model pollutant. The results showed that the photocatalytic degradation of RB5 was well fitted by the first-order kinetic model and the degradation rate of RB5 solution (20...
Source: Materials Research Bulletin - April 7, 2019 Category: Materials Science Source Type: research

Visible light assisted photodegradation of thimerosal by high performance ZnFe2O4/poly(o-phenylenediamine) composite
Publication date: Available online 5 April 2019Source: Materials Research BulletinAuthor(s): Claudio Sandoval, Suresh Ranganathan, Eimmy Ramírez, Héctor D. Mansilla, Robinson Dinamarca, Gina Pecchi, Jorge YáñezAbstractThimerosal is a mercury-based preservative that is used in pharmaceuticals, vaccines and health-care products. However, thimerosal toxicity has been well explored and hence it should be properly treated for avoiding its occurrence in the environment. Hence, we synthesized visible light active ZnFe2O4/poly(o-phenylenediamine) composite as photocatalyst for degradation of thimerosal....
Source: Materials Research Bulletin - April 7, 2019 Category: Materials Science Source Type: research

Efficient co oxidation using gold catalysts supported on wo3/titanate protonated nanotubes
Publication date: Available online 4 April 2019Source: Materials Research BulletinAuthor(s): R. Camposeco, S. Castillo, M. Hinojosa-Reyes, N. Nava, R. ZanellaAbstractWO3/titanate protonated nanotubes used to disperse gold nanoparticles were prepared by the deposition-precipitation with urea method and tested in CO oxidation reaction. Remarkably enhanced CO oxidation activity was achieved with the addition of gold nanoparticles with respect to WO3/NT and Au/NT catalysts. XPS and H2/TPR showed that when the samples were activated at 400 °C under hydrogen treatment, gold was present in the metallic Au0 form and tun...
Source: Materials Research Bulletin - April 6, 2019 Category: Materials Science Source Type: research

Formation of CoS2/N, S-codoped porous carbon nanotube composites based on bimetallic zeolitic imidazolate organic frameworks for supercapacitors
Publication date: Available online 3 April 2019Source: Materials Research BulletinAuthor(s): Kangzhou Lei, Jingzhou Ling, Jingchao Zhou, Hanbo Zou, Wei Yang, Shengzhou ChenAbstractMetal-organic frameworks featuring controllable morphologies and tunable compositions and pore structures are widely used as precursors for supercapacitors electrode materials. A zinc/cobalt-based zeolitic imidazolate framework was utilized as a precursor to synthesize N, S-codoped porous carbon supported CoS2 nanocomposites, using a two-step (carbonization and sulfurization) procedure. The as-prepared materials maintained the rhombic dodecahedra...
Source: Materials Research Bulletin - April 4, 2019 Category: Materials Science Source Type: research

Fabrication of Bi2SiO5 hierarchical microspheres with an efficient photocatalytic performance for rhodamine B and phenol removal
Publication date: Available online 2 April 2019Source: Materials Research BulletinAuthor(s): Lin Dou, Junbo Zhong, Jianzhang Li, Jieyue Luo, Ying ZengAbstractSelf-assembled three-dimensional (3D) Bi2SiO5 microspheres were synthesized via a solvothermal method using glycerol as reaction media and NH3•H2O as pH adjustment. The growth of Bi2SiO5 crystal was influenced by the solvothermal time. During the preparation process, glycerol acts as a soft template to guide the formation of the hierarchical microspheres. The photocatalytic activities of Bi2SiO5 microspheres toward the degradation of Rhodamine B and phenol under ...
Source: Materials Research Bulletin - April 3, 2019 Category: Materials Science Source Type: research

Laser-induced transformation of graphene into graphene oxide nanospheres (GONs)
Publication date: Available online 2 April 2019Source: Materials Research BulletinAuthor(s): Gaurav Kumar Yogesh, Manju Bhargavi Gumpu, Shuaib E. P., D. SastikumarAbstractIn this work, we report a template-free synthesis of graphene oxide nanosphere (GONs) by the laser ablation of graphene in ethanol. The GONs were formed by crumpling of graphene sheet under the infrared nanosecond pulsed laser irradiation. FESEM and HRTEM images of as-prepared GONs were recorded to analyse the morphological characteristics. Raman, X-ray photoelectron and FTIR spectroscopy results confirmed the formation of GONs under the laser ablation. G...
Source: Materials Research Bulletin - April 3, 2019 Category: Materials Science Source Type: research

Room temperature multiferroic properties of rare-earth-substituted Aurivillius phase Bi5Ti3Fe0.7Co0.3O15 ceramics
Publication date: Available online 2 April 2019Source: Materials Research BulletinAuthor(s): Zhonghui Yu, Xin Meng, Zhiqiang Zheng, Yuxi Lu, Hao Chen, Chuanwei Huang, Hui Sun, Kun Liang, Zhijun Ma, Yajun Qi, Tianjin ZhangAbstractPolycrystalline rare-earth-substituted Bi5Ti3Fe0.7Co0.3O15 (BReFCT (Re = La, Nd and Ho)) ceramics were prepared by conventional solid-state reaction. The main four-layered Aurivillius structure was confirmed in the as-prepared ceramics by X-ray diffraction and Raman spectra analysis though a small amount of secondary phase consisting of magnetic Co and Fe elements was detected by SEM/...
Source: Materials Research Bulletin - April 3, 2019 Category: Materials Science Source Type: research

Preparation of novel hollow δ-MnO2 composite sphere for supercapacitors and degradation of bisphenol A
In this study, birnessite manganese oxide nanosheets (δ-MnO2) are growth on hollow carbon sphere (HCS) by a facile hydrothermal reaction to prepare a novel multifunctional nanocomposite (δ-MnO2/HCS). The obtained δ-MnO2/HCS nanocomposite possesses a unique hollow structure, which exhibited excellent adsorption of electrolyte ions and macromolecules. When used as electrode for supercapacitors (SCs), it exhibits excellent electrochemical ability. The specific capacitance is 370 F/g at 5 mV/s, and 93.3% of the initial capacitance is retained after 5000 cycles. Additionally, when δ-MnO2/HC...
Source: Materials Research Bulletin - April 3, 2019 Category: Materials Science Source Type: research

Hierarchical Heterostructure Based on Molybdenum Dichalcogenide Nanosheets Assembled Nitrogen Doped Graphene Layers for Efficient Hydrogen Evolution Reaction
Publication date: Available online 3 April 2019Source: Materials Research BulletinAuthor(s): D.M. Nguyen, P.D. Hai Anh, L.G. Bach, Q.B. BuiAbstractA novel hierarchical heterostructure of molybdenum dichalcogenide nanosheets homogeneously assembled on nitrogen doped graphene layer (MoS2 NSs/N-doped GR) was successfully developed by an easy and cost-effective strategy. The MoS2 NSs/N-doped GR was then utilized for accelerating hydrogen evolution reaction (HER) in alkaline medium. It was found that the nanohybrid exhibited highly efficient catalytic activity towards HER with higher current density and smaller overpotential as...
Source: Materials Research Bulletin - April 3, 2019 Category: Materials Science Source Type: research

Temperature-dependent photoluminescence characterization of compressively strained AlGaInAs quantum wells
Publication date: Available online 1 April 2019Source: Materials Research BulletinAuthor(s): Yue Song, Ligong Zhang, Yugang Zeng, Yongyi Chen, Li Qin, Yinli Zhou, Yongshi Luo, Haifeng Zhao, Yongqiang Ning, Lijun WangAbstractA series of compressively strained AlGaInAs quantum well (QW) structures with different annealing treatment durations at 170 °C were investigated by temperature-dependent photoluminescence (PL). An abnormal S-shaped behavior in emission energy and a non-monotone evolution in spectral band width were observed at low temperature. A significant negative linear correlation between full width at h...
Source: Materials Research Bulletin - April 2, 2019 Category: Materials Science Source Type: research

Large enhancement in upconverted green emission intensity from Ho3+/Yb3+ co-doped Y2Ti2O7 phosphor in the presence of Zn2+
Publication date: Available online 1 April 2019Source: Materials Research BulletinAuthor(s): P.K. Vishwakarma, A. Bahadur, Akanksha Maurya, S.B. RaiAbstractThe Ho3+, Yb3+ co-doped Y2Ti2O7 phosphor samples have been synthesized through solid state reaction method in the absence and presence of Zn2+ ions. The X-ray diffraction (XRD) analysis show that the phase of the crystal is face centered cubic. The zinc free phosphor shows weak upconversion emission in green region due to 5S2, 5F4 →5I8 transition of Ho3+ ion on excitation with 980 nm radiation. The emission intensity is enhanced significantly in the presence...
Source: Materials Research Bulletin - April 2, 2019 Category: Materials Science Source Type: research

Photocatalytic activity of ZnO/RGO composite synthesized by one-pot solution combustion method
Publication date: Available online 31 March 2019Source: Materials Research BulletinAuthor(s): Z. Kalantari Bolaghi, S.M. Masoudpanah, M. HasheminiasariAbstractZnO/reduced graphene oxide (RGO) composites were prepared in-situ by solution combustion method using zinc nitrate and graphene oxide as oxidants and mixture of glycine and citric acid as fuel in the absence of air oxygen (closed system). Reduction of graphene oxide during combustion reaction was confirmed by the appearance of D and G bands in Raman spectra, in spite of the absence of its reflection in X-ray diffraction patterns. Scanning and transmission electron mi...
Source: Materials Research Bulletin - April 1, 2019 Category: Materials Science Source Type: research

Ambient temperature operable Bi-Co ferrite NO2 sensors with high sensitivity and selectivity
Publication date: July 2019Source: Materials Research Bulletin, Volume 115Author(s): Sandesh U. Mutkule, Kailas K. Tehare, Shyam K. Gore, Krishna Chaitanya Gunturu, Rajaram S. ManeAbstractThe sol-gel chemical synthesis, reaction mechanism, structural, morphological and elemental scanning measurements of bismuth (Bi3+)-doped spinel cobalt ferrite (Bi-Co ferrite) film sensors are explored. The gas sensor studies of Bi-Co ferrite sensors performed on methanol, ethanol, hydrogen sulphide, ammonia and nitrogen dioxide (NO2) gases at 230 °C as operating temperature where, Bi-Co ferrite sensors are extremely selective ...
Source: Materials Research Bulletin - April 1, 2019 Category: Materials Science Source Type: research

Cholesterol-Aminoacid Conjugates Treated Filter Paper-based Photoluminescence Indicator for Nitroaromatic Chemicals
Publication date: Available online 29 March 2019Source: Materials Research BulletinAuthor(s): Bandita Kalita, Bedanta Gogoi, Neelotpal Sen SarmaAbstractSelective detection of different explosive materials is essential to the current world scenario from the perspective of health, safety, and environment. Here, we have developed and characterized a couple of bio-based conjugated systems, viz. cholesterol-tryptophan and cholesterol-cysteine for the detection of nitroaromatic explosive chemicals. The presence of tryptophan moiety introduces fluorescence property to the non-fluorescence cholesterol backbone, and hence it was us...
Source: Materials Research Bulletin - March 30, 2019 Category: Materials Science Source Type: research

Enhanced photocurrent performance of partially decorated Au nanoparticles on ZnO nanorods based UV photodetector
Publication date: Available online 29 March 2019Source: Materials Research BulletinAuthor(s): Rizwan Khan, Periyayya Uthirakumar, Tae Hwan Kim, In-Hwan LeeAbstractThe surface modification is essentially required to develop a variety of hybrid zinc oxide (ZnO) nanostructures for fabricating optoelectronic devices. A facile solution method was proposed to prepare the relatively low and high aspect ratio ZnO nanorods (NRs) and subsequently decorated with gold nanoparticles (Au NPs) partially on the surface of ZnO NRs. The Au-ZnO NRs exhibited an enhanced band-edge emission due to the surface plasmon resonance quenching of dee...
Source: Materials Research Bulletin - March 30, 2019 Category: Materials Science Source Type: research

Hydrothermal synthesis and crystal structure of new red phosphors, KNaMF7:Mn4+ (M: Nb, Ta)
Publication date: Available online 30 March 2019Source: Materials Research BulletinAuthor(s): N. Kumada, S. Yanagida, T. Takei, B. HongAbstractSingle crystals of new alkali niobium and tantalum fluorides, KNaMF7 (M: Nb, Ta), were prepared by hydrothermal reactions using a perovskite-type oxides, KMO3 as one of the starting compounds. Their crystal structures were determined from single crystal X-ray diffraction data. These fluorides crystallized in the orthorhombic space group P212121 (#19) with a = 5.509(2), b = 9.100(4), and c = 11.234(5) Å for KNaNbF7 and a =&thinsp...
Source: Materials Research Bulletin - March 30, 2019 Category: Materials Science Source Type: research

Mechanistic aspects of preheating effects of precursors on characteristics of Cu2ZnSnS4 (CZTS) thin films and solar cells
Publication date: Available online 28 March 2019Source: Materials Research BulletinAuthor(s): Bo Long, Shuying Cheng, Dapeng Ye, Chuang Yue, Jie LiaoAbstractCZTS thin films are fabricated using sol-gel method following sulfurization. The material properties of the CZTS films which are prepared under different preheating temperatures and times are systematically investigated. The TGA-DTA analysis shows that the sulfides begin to be oxidized and the CZTS nanoparticles would be formed when the preheating temperature is above 300 °C. Moreover, with increasing the preheating temperature and time, the crystallinity of...
Source: Materials Research Bulletin - March 29, 2019 Category: Materials Science Source Type: research

Size Engineered Cu-Doped α-MnO2 Nanoparticles for Exaggerated Photocatalytic Activity and Energy Storage Application
Publication date: Available online 26 March 2019Source: Materials Research BulletinAuthor(s): Dheeraj Mondal, Santanu Das, Biplab Kumar Paul, Debopriya Bhattacharya, Debopriyo Ghoshal, Ananda Lal Gayen, Kaustuv Das, Sukhen DasAbstractThis investigation involves the synthesis of Cu doped α-MnO2 nanoparticles through modified Chemical route. Obtained nanoparticles (diameter_˜5 nm to ˜18 nm) are found mostly stable at high temperature and its size can be modulated by Cu doping and post sintering temperature variation. Cyclic voltammetry and galvanostatic charge-discharge performance indicate th...
Source: Materials Research Bulletin - March 27, 2019 Category: Materials Science Source Type: research

Influence of clamping effect in BaTiO3 film on the magnetoelectric behavior of layered multiferroic heterostructures
Publication date: Available online 26 March 2019Source: Materials Research BulletinAuthor(s): Tingxian Li, Hongwei Wang, Dongwei Ma, Kuoshe Li, Zhou HuAbstractThe experimental observation and analysis for the influence of clamping effect on the magnetoelectric properties of the bilayer La0.7Sr0.3MnO3/BaTiO3 (LSMO/BTO) and trilayer LSMO/BTO/LSMO heterostructures were reported. Because the significant two-dimensional clamping effect caused by the lattice mismatch of the constituting layers, the relative dielectric constant and the ferroelectric coercive field of the trilayer heterostructure was lower than that of the bilayer...
Source: Materials Research Bulletin - March 27, 2019 Category: Materials Science Source Type: research

Editorial Board
Publication date: June 2019Source: Materials Research Bulletin, Volume 114Author(s): (Source: Materials Research Bulletin)
Source: Materials Research Bulletin - March 27, 2019 Category: Materials Science Source Type: research

Material design and characterization of alkali-ion battery electrodes
Publication date: June 2019Source: Materials Research Bulletin, Volume 114Author(s): Won Jun Chang, Won Il Park (Source: Materials Research Bulletin)
Source: Materials Research Bulletin - March 27, 2019 Category: Materials Science Source Type: research

Preparation of a Peony-liked 3-D Hydrotalcite and Its Electrochemical Performance as a Zinc Negative Electrode
Publication date: Available online 25 March 2019Source: Materials Research BulletinAuthor(s): Fan Cui, Zhanhong Yang, Lili Liu, Jinlei Meng, Yinan JiangABSTRACTUrea was selected as precipitant to prepare a special structure of Peony-liked 3D Zinc-Aluminum layered double hydroxides (P-LDH) through hydrothermal method. The as-prepared materials were researched through morphology characterizations and electrochemical measurements. It was found that the 3D structure of P-LDH consisted by individual sheets forming a Peony-type morphology with excellent crystal. Electrochemical measurements revealed that P-LDH exhibited improved...
Source: Materials Research Bulletin - March 26, 2019 Category: Materials Science Source Type: research

Photocatalytic activity tuning in a novel Ag2S/CQDs/CuBi2O4 composite: Synthesis and photocatalytic mechanism
Publication date: Available online 25 March 2019Source: Materials Research BulletinAuthor(s): Huajing Gao, Fei Wang, Shifa Wang, Xiangxian Wang, Zao Yi, Hua YangAbstractCuBi2O4 dumbbell-like architecture built from nanorods was synthesized by a simple coprecipitation route. The growth process of the dumbbell-like architecture was investigated by varying the reaction duration time. Carbon quantum dots (CQDs) and Ag2S nanoparticles were assembled on the surface of the CuBi2O4 dumbbell-like architecture to produce CQDs/CuBi2O4 and Ag2S/CQDs/CuBi2O4 composites. Compared to bare CuBi2O4, the composites, particularly Ag2S/CQDs/C...
Source: Materials Research Bulletin - March 26, 2019 Category: Materials Science Source Type: research

Improving the moisture resistance and luminescent properties of K2TiF6:Mn4+ by coating with CaF2
Publication date: Available online 23 March 2019Source: Materials Research BulletinAuthor(s): Qizheng Dong, Chengjin Guo, Ling He, Xuefeng Lu, Jianbo YinAbstractThe moisture resistance and luminescent properties of K2TiF6:Mn4+ (KTF) phosphor was enhanced through a facile coating method to modify its surface, in which CaF2 was used as a coating material. The structure, morphology, and composition of the KTF@CaF2 samples were investigated via power X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), and transmission electron microsco...
Source: Materials Research Bulletin - March 24, 2019 Category: Materials Science Source Type: research