The inflence of TiO2 structure on the complete decomposition of acetaldehyde gas
Publication date: Available online 9 February 2020Source: Materials Research BulletinAuthor(s): B. Tryba, P. Rychtowski, J. Srenscek-Nazzal, J. PrzepiorskiAbstractCrystallisation of amorphous TiO2 have been performed by two steps, the hydrothermal method and following heating in Ar at 450 °C or mild heating at 200 °C under vacuum. Both methods were successful in reducing the amount of OH groups on TiO2 surface, however heating at high temperature caused significant decrease of BET surface area and increase in mesoporosity of TiO2. Low hydroxylated surface of TiO2 caused, that acetaldehyde was adsorbed...
Source: Materials Research Bulletin - February 10, 2020 Category: Materials Science Source Type: research

Fabrication and cavity-size-dependent photocatalytic property of TiO2 hollow nanoparticles with tunable cavity size
This study offers a novel approach to fabricating TiO2 hollow nanoparticles with tunable cavity size, and the unique cavity-size-dependent photocatalytic property has potential for wide popularization and application prospects.Graphical abstract (Source: Materials Research Bulletin)
Source: Materials Research Bulletin - February 9, 2020 Category: Materials Science Source Type: research

Corrigendum to “X-ray photoelectron spectroscopy and ion dynamics study of W6+ doped La2Mo2O9 as SOFC electrolyte” [Mater. Res. Bull. 105 (2018) 36–44]
Publication date: Available online 9 February 2020Source: Materials Research BulletinAuthor(s): Siddharth, Sandip Bysakh, Anjan Sil (Source: Materials Research Bulletin)
Source: Materials Research Bulletin - February 9, 2020 Category: Materials Science Source Type: research

The preparation of Janus Cu(OH)2@Cu2O/Cu mesh and application in purification of oily wastewater
Publication date: Available online 6 February 2020Source: Materials Research BulletinAuthor(s): Luyang Hu, Zhidan Wang, Yue Hu, Yuheng Liu, Shanmei Zhang, Yufeng Zhou, Yumin Zhang, Yin Liu, Benxia LiAbstractA Janus Cu(OH)2@Cu2O/Cu mesh has been synthesized by UV irradiation and in situ hydrazine vapor reduction of superhydrophobic Cu(OH)2/Cu mesh prepared by electrochemical anodization of Cu mesh followed by ODS modification. The Cu2O nanoparticles derived from partial reduction of Cu(OH)2 deposit on the Cu(OH)2 to form a core-shell heterostructure, which endows the as-prepared mesh with micro/nanoscale hierarchical morpho...
Source: Materials Research Bulletin - February 7, 2020 Category: Materials Science Source Type: research

Tunable dual emission of Bi3+ and Mn4+ co-doped LaMg0.598Nb0.402O3 double perovskite via energy transfer for plant growth lighting
Publication date: Available online 5 February 2020Source: Materials Research BulletinAuthor(s): Hang Zhang, Hang Yang, Xiangjie Ma, Guogang Li, Shiqi Liu, Haoran Li, Jian Yang, Yujun Liang, Yongjun ChenAbstractA series of Bi3+ and Mn4+ co-doped LaMg0.598Nb0.402O3 (LMNO) phosphors via a conventional high-temperature solid-state reaction. Typically, LMNO: Bi3+ shows blue emission with a peak at 450 nm under 315 nm excitation. Upon excitation at 330 nm, Bi3+ and Mn4+ co-doped LMNO phosphors present dual emission, where the blue emission is mainly from the 3P1 → 1S0 transition of Bi3+ and the red emis...
Source: Materials Research Bulletin - February 7, 2020 Category: Materials Science Source Type: research

High magnetoresistance in La0.5Nd0.15Ca0.25A0.1MnO3 (A = Ca, Li, Na, K) CMR manganites: correlation between their magnetic and electrical properties
Publication date: Available online 4 February 2020Source: Materials Research BulletinAuthor(s): Mukesh Kumar Verma, Narayan Dutt Sharma, Suman Sharma, Nisha Choudhary, Devinder SinghAbstractThe influence of A-site cation disorder of monovalent alkali ions on structural and magneto-transport properties of colossal magnetoresistive (CMR) materials has been reported. All the compounds crystallize in Pbnm space group with orthorhombic symmetry. At low temperature, the samples exhibit a paramagnetic (PM) to ferromagnetic (FM) transition and a semiconductor to metallic one. The variation in both Curie temperature (Tc) and metal-...
Source: Materials Research Bulletin - February 6, 2020 Category: Materials Science Source Type: research

Judd-Ofelt and quantum cutting analysis of Eu3+ or Pr3+ doped β-NaGdF4 nanorods obtained by rapid coprecipitation method
Publication date: May 2020Source: Materials Research Bulletin, Volume 125Author(s): Y. Cheroura, Z. Smara, A. Potdevin, D. Boyer, A. Chafa, O. Ziane, R. MahiouAbstractPure hexagonal β-NaGdF4 and Eu3+ or Pr3+-doped β-NaGdF4 nanocrystals in shape of nanorods of ∼140 nm of length have been synthesized using a simple and rapid coprecipitation method. XRD analysis evidenced pure single phases exhibiting characteristic luminescence of Eu3+ or Pr3+ ions when excited under UV or blue radiations. Samples gave rise to intense orange-red emission and quite white emission in the case of respectively Eu3+ or Pr3+ doped ...
Source: Materials Research Bulletin - February 6, 2020 Category: Materials Science Source Type: research

Microstructural and optical properties of Sn4Sb6S13 nanocrystals deposited on PAA templates
In this study, the Sn4Sb6S13 (TAS) nanocrystals were grown on the porous anodic alumina (PAA) templates through the vacuum thermal evaporation process at different deposition temperatures. The influence of deposition temperature on the microstructural and optical properties of TAS/PAA was investigated systematically. As the substrate temperature is increased, crystallite size increases while the strain and the dislocation density decrease. An improvement of the crystallinity is deduced from Raman spectra and X-Ray diffraction (XRD) patterns. The homogeneous distribution of TAS nanocrystals on PAA substrates was observed fr...
Source: Materials Research Bulletin - February 4, 2020 Category: Materials Science Source Type: research

Facile synthesis of iron and cerium co-doped g-C3N4 with synergistic effect to enhance visible-light photocatalytic performance
Publication date: Available online 3 February 2020Source: Materials Research BulletinAuthor(s): Tao Pan, Dongdong Chen, Jianzhang Fang, Kun Wu, Weihua Feng, Ximiao Zhu, Zhanqiang FangAbstractA novel visible-light-driven Fe and Ce bimetallic co-doped g-C3N4 (Fe-Ce/CN) photocatalyst was successfully fabricated by a straightforward method. Experimental results indicated that no matter in the single pollutant system or mixed pollutants system containing Cr(Ⅵ) and an organic dye, Fe-Ce/CN exhibits super photocatalytic activity. It is mainly caused by the synergistic effect of Fe and Ce ions. Fe inserted into the lattice of g-...
Source: Materials Research Bulletin - February 4, 2020 Category: Materials Science Source Type: research

Low temperature synthesis of nanostructured LiFePO4/C cathode material for lithium ion batteries
Publication date: Available online 31 January 2020Source: Materials Research BulletinAuthor(s): Amir Hossein Omidi, Alireza Babaei, Abolghasem AtaieAbstractNanostructured olivine LiFePO4 was successfully synthesized by mechanical activation of powder obtained by co-precipitation. The effects of mechanical activation energy, calcination temperature and carbon coating on the LiFePO4 characteristics were investigated. X-ray diffraction results revealed that mechanical activation has facilitated the formation of pure, fully crystallized and nano-structured LiFePO4. Scanning electron microscope observations showed that the aver...
Source: Materials Research Bulletin - February 1, 2020 Category: Materials Science Source Type: research

Facile synthesis of ultrafine rGO/WO3 nanowire nanocomposites for highly sensitive toxic NH3 gas sensors
Publication date: Available online 30 January 2020Source: Materials Research BulletinAuthor(s): Chu Manh Hung, Do Quang Dat, Nguyen Van Duy, Vu Van Quang, Nguyen Van Toan, Nguyen Van Hieu, Nguyen Duc HoaAbstractWe introduce a facile and scalable synthesis of rGO/WO3 nanocomposites by hydrothermal method for gas sensing applications. The characterization of rGO/WO3 nanocomposites by some advanced techniques such as scanning electron microscopy, high resolution transmission electron microscopy and Raman spectroscopy revealed that high quality rGO/WO3 nanocomposites included single crystal WO3 nanowires (average diameter of 1...
Source: Materials Research Bulletin - January 31, 2020 Category: Materials Science Source Type: research

Effect of Fluxes on Luminescence Properties of Color-Tunable Ba1.3Ca0.7SiO4:Eu2+, Mn2+ Phosphor for Near-Ultraviolet White-LEDs
Publication date: Available online 30 January 2020Source: Materials Research BulletinAuthor(s): Haohao Wang, Feifei Mao, Yujie Liu, Xiping Jiang, Baoliang Ma, Liangshu Wei, Fang Wu, Langkai LiAbstractEu2+/Mn2+-codoped Ba1.3Ca0.7SiO4 (BCS), a promising single-phase and white-light-emitting phosphor, is prepared by the solid-state reaction at a calcination temperature of 1000 °C for 2 h by adding SrCl2, CaCl2, KCl, NaCl, NH4Cl, Li2CO3, BaF2, CaF2, and BaCl2 as fluxes. The samples are characterized by X-ray diffraction and photoluminescence spectroscopy. The emission wavelength and color-rendering index (CRI) can be tuned...
Source: Materials Research Bulletin - January 31, 2020 Category: Materials Science Source Type: research

Corrigendum to “Use of density functional theory to investigate the optical and magnetic behaviours of Ge1-xMnxTe half-metallic ferromagnets” [Mater. Res. Bull. 123 (2020) 110706]
Publication date: Available online 30 January 2020Source: Materials Research BulletinAuthor(s): M. Hassan, Q. Mahmood, S.M. Ramay (Source: Materials Research Bulletin)
Source: Materials Research Bulletin - January 31, 2020 Category: Materials Science Source Type: research

The defect aggregation of RE3+ (RE = Y, La ∼ Lu) in MF2 (M = Ca, Sr, Ba) fluorites
Publication date: May 2020Source: Materials Research Bulletin, Volume 125Author(s): Fengkai Ma, Fang Su, Rongfu Zhou, Yiyi Ou, Liujing Xie, Chunmeng Liu, Dapeng Jiang, Zhen Zhang, Qinghui Wu, Liangbi Su, Hongbin LiangAbstractThe clustering of trivalent lanthanide-doped fluorite was divided into four stages. Characters of the first three stage discrete clusters were studied by the density functional theory (DFT) based first principles calculation in the work. The results revealed the relative stabilities of first stage C4v and C3v were intimately correlated with that of the second and third stage clusters. The more stable C...
Source: Materials Research Bulletin - January 31, 2020 Category: Materials Science Source Type: research

Different morphologies of ZnO via solution combustion synthesis: The role of fuel
In this study, different morphologies of zinc oxide (ZnO) powders were obtained via solution combustion route using poly(vinyl-pyrrolidone) (PVP) as fuel at various fuel to oxidant ratios. The increase of fuel amounts led to the transformation of giant pyramid-like particles to hexagonal nano-disk ones. N2 adsorption-desorption isotherms showed that the specific surface area increased from 23 to 41 m2/g at the higher fuel contents. By considering the decrease of particle size, the band gap energy value was turned from 3.02 to 3.13 eV. The ZnO powders prepared at a fuel to oxidant ratio of 1.5 photodegraded ab...
Source: Materials Research Bulletin - January 29, 2020 Category: Materials Science Source Type: research

Impact of charge compensation on optical and thermometric behaviour of titanate phosphors
Publication date: Available online 27 January 2020Source: Materials Research BulletinAuthor(s): Sasank Pattnaik, Vineet Kumar RaiAbstractThe structural and optical characterization of the CaTiO3: Er3+/Yb3+ phosphors prepared using conventional solid-state reaction method have been performed through XRD, FESEM, EDAX and diffuse reflectance analysis. The excitation, emission and UC emission studies have been done. The effect of co-doping with Li+/Na+ ions on the UC emission intensity and dynamics involved in the process have been studied. The temperature sensing ability, main cause of concentration quenching, thermal stabili...
Source: Materials Research Bulletin - January 28, 2020 Category: Materials Science Source Type: research

Room-temperature preparation of MIL-88A as a heterogeneous photo-Fenton catalyst for degradation of rhodamine B and bisphenol A under visible light
Publication date: Available online 27 January 2020Source: Materials Research BulletinAuthor(s): Huifen Fu, Xiao-Xu Song, Lin Wu, Chen Zhao, Peng Wang, Chong-Chen WangAbstractMIL-88A, a Fe-based MOF, with different sizes was prepared successfully at room-temperature, which was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). Water played an important role in the room-temperature synthesis as water could facilitate the deprotonation of fumaric acid and hydrolysis of iron salt to accelerate cry...
Source: Materials Research Bulletin - January 28, 2020 Category: Materials Science Source Type: research

Construction of 2D/2D TiO2/g-C3N4 Nanosheet Heterostructures with Improved Photocatalytic Activity
Publication date: Available online 27 January 2020Source: Materials Research BulletinAuthor(s): Huihui Zhu, Xiaoju Yang, Min Zhang, Qiuye Li, Jianjun YangAbstractConstructing two-dimensional (2D) heterostructure is an effective method to obtain highly efficient photocatalysts. In this work, 2D/2D TiO2/g-C3N4 heterostructures were constructed via in-situ growth of TiO2 nanosheets on the surface of g-C3N4 nanosheets by a facile hydrothermal co-assembly technique. The increased dispersion is favorable to expose more vacancies, which is beneficial to the enhancement of visible light absorption. This unique 2D/2D heterostructur...
Source: Materials Research Bulletin - January 28, 2020 Category: Materials Science Source Type: research

Nitrogen-doped carbon spheres decorated with CoSx nanoparticles as multifunctional electrocatalysts for rechargeable Zn-air battery and overall water splitting
This study provides a new strategy to synthesize active electrocatalysts with multiple functions in energy conversion and storage.Graphical abstractThe anchoring of CoSx nanoparticles with N-doped carbon spheres shows excellent multifunctional activities of electrocatalytic ORR, HER, and OER, demonstrating the potential applications in rechargeable Zn-air battery and water-splitting electrolyzer. (Source: Materials Research Bulletin)
Source: Materials Research Bulletin - January 28, 2020 Category: Materials Science Source Type: research

Fabrication of the AgI/BiOI/BiPO4 multi-heterojunction with high photocatalytic activity
Publication date: Available online 25 January 2020Source: Materials Research BulletinAuthor(s): Yanju Long, Lingxin Li, Luting Zhou, Sifeng Zhang, Lulu Wang, Ziguang Zheng, Shenglan Wu, Yunrui Hei, Fengzhi JiangAbstract17α-acetylestradiol (EE2) as an environmental endocrine disruptor (EDCs) with strong estrogenic effect and stable chemical properties. Water treatment technologies involving photocatalytic decomposition of pollutants technology are widely used to degrade pollutants in water, having excellent research value and good applicability prospects. A series of photocatalysts (AgI/BiOI/BiPO4, AgI/BiOI and AgI/Bi...
Source: Materials Research Bulletin - January 26, 2020 Category: Materials Science Source Type: research

Editorial Board
Publication date: April 2020Source: Materials Research Bulletin, Volume 124Author(s): (Source: Materials Research Bulletin)
Source: Materials Research Bulletin - January 26, 2020 Category: Materials Science Source Type: research

The defect aggregation of RE3+ (RE=Y, La ∼ Lu) in MF2 (M=Ca, Sr, Ba) fluorites
Publication date: Available online 24 January 2020Source: Materials Research BulletinAuthor(s): Fengkai Ma, Fang Su, Rongfu Zhou, Yiyi Ou, Liujing Xie, Chunmeng Liu, Dapeng Jiang, Zhen Zhang, Qinghui Wu, Liangbi Su, Hongbin LiangAbstractThe clustering of trivalent lanthanide-doped fluorite was divided into four stages. Characters of the first three stage discrete clusters were studied by the density functional theory (DFT) based first principles calculation in the work. The results revealed the relative stabilities of first stage C4v and C3v were intimately correlated with that of the second and third stage clusters. The m...
Source: Materials Research Bulletin - January 25, 2020 Category: Materials Science Source Type: research

Bi2S3 nanoparticles densely grown on electrospun-carbon-nanofibers as low-cost counter electrode for liquid-state solar cells
Publication date: Available online 24 January 2020Source: Materials Research BulletinAuthor(s): Xiaohui Zhao, Dongyang Wang, Shuang'an Liu, Zixiang Li, Jie Meng, Yungen Ran, Yucang Zhang, Ling LiAbstractDye-sensitized solar cells (DSSCs) counter electrode (CE) is needed to have both good electrical conductivity and high catalytic activity, and composite materials are better meet these two requirements. In this work, Bi2S3/carbon nanofiber (CNFs) composites are synthesized by simple electrospinning and hydrothermal methods, and after optimization of the content of Bi2S3, the large amount Bi2S3 nanoparticles are grown densel...
Source: Materials Research Bulletin - January 25, 2020 Category: Materials Science Source Type: research

Effect of phosphorus in the molten iron on the performance of electrochemical sulfur sensor prepared by ZrO2(MgO)/CaAl2O4+CaAl4O7
Publication date: Available online 25 January 2020Source: Materials Research BulletinAuthor(s): Tianpeng Wen, Jingkun Yu, Endong Jin, Lei Yuan, Chen Tian, Yaohui Yu, Tao LiuAbstractThe effect of the phosphorus in the molten iron on the performance of sulfur sensor was investigated, where the sulfur sensor was prepared by bilayer system of ZrO2(MgO)/CaAl2O4+CaAl4O7. The behavior and mechanism were also studied in this work. The results indicated that the CaS auxiliary electrode for sulfur sensor could be synthesized in situ by the CaAl2O4+CaAl4O7 coating at the measurement condition of a[S]a[O]≥40.85 and a[P]⋅a[O]52...
Source: Materials Research Bulletin - January 25, 2020 Category: Materials Science Source Type: research

BiVO4/TiO2 nanocomposite: Electrochemical sensor for hydrogen peroxide
This study reports the synthesis of the BiVO4/TiO2 nanocomposite in optimized conditions using the hydrothermal route. By varying many experimental parameters such as the temperature, the hydrothermal reaction time, the pH of the solution and the surfactant’s nature, we have successfully obtained BiVO4 (monoclinic)/TiO2 (anatase) nanomaterials with different morphologies. These materials were characterized by X-ray powder Diffraction (XRD), Infrared Spectroscopy (IR) and Scanning Electron Microscopy (SEM). The as-prepared nanocomposites were employed to manufacture hybrid electrode sensors to detect H2O2. The BiVO4/T...
Source: Materials Research Bulletin - January 25, 2020 Category: Materials Science Source Type: research

Plasmonic and Nonlinear Optical Behavior of Nanostructures in Glass Matrix for Photonics application
Publication date: Available online 23 January 2020Source: Materials Research BulletinAuthor(s): Promod Kumar, Mohan Chandra Mathpal, Jai Prakash, Gangareddy Jagannath, WD Roos, H.C. SwartAbstractThere is a growing interest in bimetallic core shell nanostructures that comprised out of noble metals due to their fascinating plasmonic properties, leading to a wide range of applications in future nanotechnology. Here we report on Ag/Cu core shell nanostructures in a glass matrix. It includes novel approaches for characterizing embedded core shell nanostructures with a detailed study on the nanosize effect in tuning their optica...
Source: Materials Research Bulletin - January 25, 2020 Category: Materials Science Source Type: research

In-situ pulsed laser induced growth of CdS nanoparticles on ZnO nanorods surfaces
Publication date: Available online 22 January 2020Source: Materials Research BulletinAuthor(s): Y. Rodríguez-Martínez, J. Alba-Cabañas, O. Cruzata, S. Bianco, E. Tresso, F. Rossi, L. Vaillant-RocaAbstractHerein we present a process for the in situ growth present a process for the in situ growth of CdS nanoparticles using a pulsed laser irradiation. A Nd-YAG laser was applied to ZnO nanorods previously submerged in an aqueous precursor solution containing cadmium chloride and thiourea. For optimum values of the laser fluence, around 40 mJ/cm2 it was possible to fabricate a highly homogeneous film...
Source: Materials Research Bulletin - January 23, 2020 Category: Materials Science Source Type: research

Tuning the Impedance Matching Characteristics of Microwave Absorbing Paint in X-band Using Copper Particles and Polypyrrole Coating
Publication date: Available online 22 January 2020Source: Materials Research BulletinAuthor(s): Qiang Gu, Mojtaba Jafarian, Seyyed Salman Seyyed Afghahi, Yomen Atassi, Rama Al-QassarAbstractA new multifunctional microwave absorbing material is designed. Two types of ferrites were synthesized, namely soft NiCoTi ferrite and hard SrCoTi ferrites, by sol-gel auto combustion method. Then, the ferrites along with an appropriate quantity of micro-copper particles were coated by polypyrrole using in situ chemical polymerization of pyrrole. The resulted material was hosted into a polyurethane matrix to prepare a microwave absorbin...
Source: Materials Research Bulletin - January 23, 2020 Category: Materials Science Source Type: research

Realizing Near-UV Light Excitation of Mn2+ via Efficient Energy Transfer from Eu2+ for White LEDs
Publication date: Available online 20 January 2020Source: Materials Research BulletinAuthor(s): Quan Dong, Jiaojie Yang, Shengan He, Jun Cui, Fengli Yang, Jiaqing Peng, Fu Du, Shaohua Yang, Xinyu YeAbstractA series of Eu2+ and Mn2+ co-activated Al5O6N multi-color phosphors were fabricated through the gas-pressure sintering method, and they displayed intense blue-green emitting at near-ultraviolet irradiation due to efficient energy transfer. Dipole-dipole interaction was proved to be the leading role for Eu2+-Mn2+energy transfer and the highest energy transfer efficiency was obtained about 78%. Furthermore, tunable emissio...
Source: Materials Research Bulletin - January 22, 2020 Category: Materials Science Source Type: research

Facile one-pot microwave-assisted synthesis of tungsten-doped BiVO4/WO3 heterojunctions with enhanced photocatalytic activity
Publication date: Available online 18 January 2020Source: Materials Research BulletinAuthor(s): Caroline H. Claudino, Maria Kuznetsova, Bárbara S. Rodrigues, Changqiang Chen, Zhiyu Wang, Mauro Sardela, Juliana S. SouzaAbstractBismuth vanadate (BiVO4) is considered one of the most successful candidates to be used as photoanode for solar-to-hydrogen conversion. However, its relatively high recombination rates and considered low long-term stability limits its applicability. Doping BiVO4 with tungsten and developing heterojunctions with inorganic perovskites has emerged as strategies to overcome these issues. However, t...
Source: Materials Research Bulletin - January 20, 2020 Category: Materials Science Source Type: research

BiVO4/TiO2 nanocomposite: electrochemical sensor forhydrogenperoxide
This study reports the synthesis of the BiVO4/TiO2 nanocomposite in optimized conditions using the hydrothermal route. By varying many experimental parameters such as the temperature, the hydrothermal reaction time, the pH of the solution and the surfactant’s nature, we have successfully obtained BiVO4 (monoclinic)/TiO2 (anatase) nanomaterials with different morphologies. These materials were characterized by X-ray powder Diffraction (XRD), Infrared Spectroscopy (IR) and Scanning Electron Microscopy (SEM). The as-prepared nanocomposites were employed to manufacture hybrid electrode sensors to detect H2O2. The BiVO4/T...
Source: Materials Research Bulletin - January 17, 2020 Category: Materials Science Source Type: research

Size variation in nanocrystalline Zn0.2Ni0.8Gd0.05Fe1.95O4 ferrites: Exchange bias effect and its correlation with disordered surface spins
Publication date: Available online 16 January 2020Source: Materials Research BulletinAuthor(s): Mritunjoy Prasad Ghosh, Samrat MukherjeeAbstractThe article reports the influence of particle size variation on microstructural, optical and magnetic properties of nanocrystalline Gd doped Ni-Zn ferrites with a generic formula Zn0.2Ni0.8Gd0.05Fe1.95O4. The nanoparticles were synthesized using chemical co-precipitation technique and the average crystallite sizes were found in the range of 4 nm to 29 nm as estimated from Scherrer’s relation. Raman spectra confirmed the lowering of symmetry of the octahedral sit...
Source: Materials Research Bulletin - January 17, 2020 Category: Materials Science Source Type: research

Palladium nanoparticles encapsulated in carboxylic acid functionalized periodic mesoporous organosilicas as efficient and reusable heterogeneous catalysts for hydrogen generation from ammonia borane
Publication date: Available online 16 January 2020Source: Materials Research BulletinAuthor(s): Juti Rani Deka, Diganta Saikia, Pang-Hao Chen, Ke Ting Chen, Hsien-Ming Kao, Yung-Chin YangAbstractBenzene-bridged periodic mesoporous organosilicas (PMOs) are functionalized with carboxylic acid (‒COOH) groups and used as the supports to immobilize Pd nanoparticles (Pd NPs). It is found that the –COOH functional groups play an important role in controlling the dispersion and growth of Pd NPs. Pd@PMOs are employed as the catalyst for hydrogen generation from hydrolysis of ammonia borane (AB) which shows turnover frequenc...
Source: Materials Research Bulletin - January 17, 2020 Category: Materials Science Source Type: research

Fabrication of novel Bi2MoO6/N-rGO catalyst for the efficient photocatalytic degradation of harmful dyes
In this study, a novel Bi2MoO6/N-rGO composite was successfully fabricated by a solvothermal method and well-characterized by various instrumental techniques. The Bi2MoO6/N-rGO catalyst exhibited superior photocatalytic performance towards the degradation of dyes compared to bare Bi2MoO6 and Bi2MoO6/rGO catalysts in the presence of visible, UV and solar light irradiations. Such a high photocatalytic performance could be attributed to the enhanced optical absorption property and charge separation efficiency of the composite. The synthesized Bi2MoO6/N-rGO catalyst retained stable photocatalytic performance even after four su...
Source: Materials Research Bulletin - January 16, 2020 Category: Materials Science Source Type: research

Crystal structure and photoluminescence properties of blue-green-emitting Ca1−xSrxZr4(PO4)6: Eu2+ (0 ≤ x ≤ 1) phosphors
Publication date: Available online 16 January 2020Source: Materials Research BulletinAuthor(s): Shangwei Wang, Yelong Wu, Yufan Fan, Lina Wu, Jinying YuAbstractCa1−xSrxZr4(PO4)6: Eu2+ (0≤x≤1) was synthesized by a conventional solid‐state reaction for the first time. XRD data and the Rietveld refinement analysis confirm that the samples are single phase and continuous solid solutions are formed in the full range of 0≤x≤1. The emission peak can be tuned from 492 to 463 nm accompanied by a band narrowing from 87 to 68 nm due to the combined effects of crystal field regulation and site-preference of Eu2+. B...
Source: Materials Research Bulletin - January 16, 2020 Category: Materials Science Source Type: research

Hollow Micro-spherical Bismuth Oxy-chloride for Superior Visible Light Induced Dye-sensitized Photocatalytic Activity and its Theoretical Insight
Publication date: Available online 14 January 2020Source: Materials Research BulletinAuthor(s): Ratna Sarkar, Dimitra Das, Bikram Kumar Das, Anuradha Mitra, Nirmalya S. Das, Subrata Sarkar, Kalyan K. ChattopadhyayAbstractHighly-crystalline BiOCl samples exhibiting hollow microsphere like morphology with exposed (110) crystal facets have been synthesized in the present work. The as-synthesized BiOCl samples were characterized in detail by several sophisticated techniques for proper understanding and subsequent analysis of the phase formation, nature of the chemical bonds existing within the samples, composition, morphology ...
Source: Materials Research Bulletin - January 16, 2020 Category: Materials Science Source Type: research

Boosting photocatalytic activities of BiVO4 by creation of g-C3N4/ZnO@BiVO4 Heterojunction
Publication date: Available online 13 January 2020Source: Materials Research BulletinAuthor(s): Nurul Aida Mohamed, Javad Safaei, Aznan Fazli Ismail, Muhammad Najib Khalid, Muhammad Fareez Amir Mohd Jailani, Mohamad Firdaus Mohamad Noh, Nurul Affiqah Arzaee, Di Zhou, Jagdeep S. Sagu, Mohd Asri Mat TeridiAbstractBiVO4 has attracted great attention as a semiconductor for Photoelectrochemical (PEC) water splitting because of its low cost, good stability, and suitable band gap of 2.4 eV. In this research, the contribution of g-C3N4@ZnO on BiVO4 photoelectrochemical performance, light absorption, charge transportation, a...
Source: Materials Research Bulletin - January 14, 2020 Category: Materials Science Source Type: research

Efficient Cd/Ce nanoparticles supported on reduced graphene oxide for the reduction of 4-nitrophenol and the oxidation of olefins: experimental and theoretical study
Publication date: Available online 11 January 2020Source: Materials Research BulletinAuthor(s): Maryam Lashanizadegan, Maryam Anafcheh, Hoda Mirzazadeh, Parisa GholipoorAbstractReduced graphene oxide-supported cadmium and cerium nanoparticles (Cd/Ce/RGO) were prepared by a simple and economical method, with ethanol as an ecofriendly solvent. Cd/Ce/RGO was employed as catalysts in two different reactions: the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) and the oxidation of olefins. The results of the reduction reaction showed that 98% of 4-NP was decreased in the presence of Cd/Ce/RGO (Cd to Ce 3:1 (w/w)) as t...
Source: Materials Research Bulletin - January 13, 2020 Category: Materials Science Source Type: research

Preparation and photocatalytic properties of rutile TiO2 with a unique morphology and SrTiO3–TiO2 composites obtained by acid treatment of SrTiO3
Publication date: Available online 11 January 2020Source: Materials Research BulletinAuthor(s): Sayaka Yanagida, Kiyoto Sano, Takahiro Takei, Nobuhiro KumadaAbstractIn this work, rutile, anatase, and SrTiO3–TiO2 composites were prepared by acid treatment of SrTiO3 using various concentrations of HNO3 at 90 °C. The product of the acid treatment depended on the acid concentration: fine TiO2 (anatase) particles were obtained for 0.5 M, a mixture of anatase- and rutile-phase TiO2 was obtained for 1 M, and large dumbbell-like TiO2 (rutile) particles were obtained for 2, 3, and 4 M HNO3. Fur...
Source: Materials Research Bulletin - January 13, 2020 Category: Materials Science Source Type: research

Eco-friendly Preparation of Hierarchically Self-assembly Porous ZnO Nanosheets for Enhanced Photocatalytic Performance
Publication date: Available online 9 January 2020Source: Materials Research BulletinAuthor(s): Bitao Su, Ming Zhong, Lijuan Han, Miaomiao Wei, Yang Liu, Haidong Yang, Ziqiang LeiAbstractIn this work, wasted biomass pomelo peels (PPs) were chosen as template to prepare a series of ZnO nanomaterials via a simple two-step dipping/adsorbing-calcining strategy without adding any other additives, especially alkali precipitant. The morphology of the as-obtained ZnO can be tuned by controlling the amount of PPs, which transforms from stacked nanoparticles to hierarchically porous nanosheets. When evaluated as photocatalysts for me...
Source: Materials Research Bulletin - January 10, 2020 Category: Materials Science Source Type: research

CNT-based sensor array for selective and steady detection of SO2 and NO
Publication date: Available online 9 January 2020Source: Materials Research BulletinAuthor(s): Hui Song, Quanfu Li, Yong ZhangAbstractThe accurate detection of NO and SO2 emitted from fossil fuel power plants is critical for realizing the real-time control of clean combustion systems and environmental protection. An array of two CNT-based ionization sensors with different electrode separations is used to detect NO and SO2 in flue gas. The responses of each sensor show a monotone decreasing response, and are obviously separated but almost parallel. The decreasing response is attributed to strong consumption of N2(A3∑u+)...
Source: Materials Research Bulletin - January 10, 2020 Category: Materials Science Source Type: research

Effects of Bi substitution on the structures, electrical properties, and transparency of Sr2Na1−3xBixNb5O15 ceramics
Publication date: Available online 8 January 2020Source: Materials Research BulletinAuthor(s): Shudong Xu, Pei Yang, Zhuo Deng, Lingling Wei, Zupei YangAbstractSr2Na1−3xBixNb5O15 ceramics (SNBN; x = 0.00, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, and 0.08) were synthesized by a conventional solid-state reaction method. To eliminate the impurity phase in the Sr2NaNb5O15 ceramics, we introduced high-charge Bi3+ into the SNN ceramics to reduce the filling degree of A1 and A2 sites. X-ray diffraction results confirmed this compositional design, because all SNBN ceramics showed a pure tetragonal tungsten-bronze phase alon...
Source: Materials Research Bulletin - January 10, 2020 Category: Materials Science Source Type: research

One-pot fabrication of CdxZn1-xS/ZnO nanohybrid using mixed sulfur sources for photocatalysis
Publication date: Available online 8 January 2020Source: Materials Research BulletinAuthor(s): Jianhao Qiu, Ming Li, Yiling Wan, Shu Zhang, Huanting Wang, Jianfeng YaoAbstractCdxZn1-xS/ZnO nanohybrids were fabricated by using mixed Na2S and Na2S2O3 as the sulfur source via a facile one-pot synthesis. CdxZn1-xS/ZnO with x = 0.54, 0.58, 0.62, 0.68 and 0.75 was successfully tuned by altering the molar ratio of Na2S and Na2S2O3. Sole sulfur source Na2S or Na2S2O3 could only generate Cd0.5Zn0.5S or CdS/ZnO, respectively. The in-situ co-growth of CdxZn1-xS and ZnO makes them combine penetratingly in CdxZn1-xS/ZnO n...
Source: Materials Research Bulletin - January 10, 2020 Category: Materials Science Source Type: research

Dielectric properties of CaZrO3 coatings made by plasma spraying and bulks fired by spark plasma sintering
In this study, water stabilized plasma spraying (WSP) was used to prepare CaZrO3 coatings, whereas CaZrO3 bulk samples were fired using spark plasma sintering (SPS). The spraying feedstock was prepared from fine CaZrO3 powder by agglomeration (spray drying) and sintering. The initial fine CaZrO3 powder was used for SPS. In case of plasma sprayed materials, the influence of spraying process on the coating structure was studied. Differences in the structure of plasma sprayed thick coatings and SPS compacts were characterized using microscopy, density and porosity measurements. The deposits were striped-out from the substrate...
Source: Materials Research Bulletin - January 10, 2020 Category: Materials Science Source Type: research

Photoluminescent Properties and Energy Transfer Mechanism of Tb3+-Ce3+ doped CaSi2O2N2 Oxynitride Phosphors
Publication date: Available online 3 January 2020Source: Materials Research BulletinAuthor(s): Yingxuan Zou, Xiao Min, Zongjian Liu, Lixin Yu, Bingfa LiuAbstractThe Ce3+-Tb3+ doped CaSi2O2N2 phosphors are successfully obtained via conventional solid-state reaction at normal pressure. Broad absorption bands from Ce3+ are clearly observed in the excitation spectra of CaSi2O2N2:Tb3+, Ce3+. The emission spectra present a combination of Tb3+ and Ce3+ emission bands, and the emission intensity of Ce3+ is decreased along with the enhancement of the emission intensity of Tb3+. The energy transfer from Ce3+ to Tb3+ in the CaSi2O2N2...
Source: Materials Research Bulletin - January 4, 2020 Category: Materials Science Source Type: research

Investigation of the luminescent mechanism in Eu3+-doped Ln2MoO6 (Ln3+= La3+, Gd3+, Y3+) phosphors for warm WLED
Publication date: Available online 2 January 2020Source: Materials Research BulletinAuthor(s): Xin Li, Zhen Sun, Mochen Jia, Guofeng Liu, Zuoling Fu, Yanling Wei, Tianqi Sheng, Panpan LiAbstractEuropium-ion doped La2MoO6, Gd2MoO6, Y2MoO6 phosphors were synthesized by hydrothermal method with further calcination. The charge transfer energies of these materials were calculated by chemical bond dielectric theory of complex crystals and the results were consistent with the experiment data (ECT(La2MoO6)>ECT(Gd2MoO6)=ECT(Y2MoO6)). Notably, the larger Ω2 showed the lower symmetrical ligand field and more covalent Eu&ndas...
Source: Materials Research Bulletin - January 3, 2020 Category: Materials Science Source Type: research

Luminescence performance of Cr3+ doped and Cr3+, Mn4+ co-doped La2ZnTiO6 phosphors
Publication date: Available online 2 January 2020Source: Materials Research BulletinAuthor(s): Jinhong Ou, Xiaoliang Yang, Siguo XiaoAbstractCr3+ doped and Cr3+, Mn4+ co-doped La2ZnTiO6 phosphors were prepared using solid-state reaction method and their luminescence performance has been investigated. La2ZnTiO6: Cr3+ phosphor exhibits red luminescence band centred at 740 nm when excited with light in spectral range from ultraviolet to blue and green (300 nm-500 nm). Both emissions at 740 nm (Cr3+) and at 710 nm (Mn4+) can be observed in the Cr3+, Mn4+ co-doped phosphor and its total lumine...
Source: Materials Research Bulletin - January 3, 2020 Category: Materials Science Source Type: research

Synthesis and characterization of reduced graphene oxide-iron oxide-polyaniline ternary nanocomposite and determination of its photothermal properties
Publication date: Available online 2 January 2020Source: Materials Research BulletinAuthor(s): Furkan Soysal, Zafer Çıplak, Bengü Getiren, Ceren Gökalp, Nuray YıldızAbstractConventional cancer therapy methods are thought to be replaced by photothermal therapy in near future due to less invasive, less consuming, and highly selective therapeutic features of the latter. Implementing photothermal therapy in practice requires development of multifunctional and efficient photosensitizing agents. The purpose of this study is to develop a magnetic nanocomposite with excellent photothermal performance. A ternary...
Source: Materials Research Bulletin - January 3, 2020 Category: Materials Science Source Type: research

Construction of DyVO4/nitrogen deficient g-C3N4 composite for enhanced visible-light photocatalytic activity for tetracycline degradation
Publication date: Available online 2 January 2020Source: Materials Research BulletinAuthor(s): Keke Shu, Fangyan Chen, Weilong Shi, Feng Guo, Yubin Tang, Hongji Ren, Mingyang LiAbstractThe defects engineering takes effects on regulating the electronic structure to enhance the optical absorption, and acting as the capture centers of charge carriers to hinder the recombination of electron hole pairs. In this work, DyVO4/nitrogen deficient g-C3N4 (DVO/CNx) composite photocatalysts were successfully synthesized by a simple precipitation-calcination method, which showed excellent visible-light photocatalytic activity for the de...
Source: Materials Research Bulletin - January 3, 2020 Category: Materials Science Source Type: research

Structural and luminescence properties of Y2O3:Eu3+red phosphor by incorporation of Ga3+ and Bi3+ions
Publication date: Available online 31 December 2019Source: Materials Research BulletinAuthor(s): A. Yousif, Babiker H. Abas, S. Som, N.J. Shivaramu, H.C. SwartAbstractThe cationic substitution of Y3+simultaneously with Bi3+/Ga3+ ions on the crystal structure of the Y2O3:Eu3+ phosphor and its effect on the structure, the luminescence and thermoluminescence properties was investigated. Four samples were prepared by using a sol-gel combustion method. The substitution of Bi3+/Ga3+ ions modified the Y2O3:Eu3+ phosphor structure, which showed a transition phase structure. In addition, the presence of Bi3+/Ga3+ ions simultaneousl...
Source: Materials Research Bulletin - January 1, 2020 Category: Materials Science Source Type: research