Article
Materials Science, Multidisciplinary
Shrabani Paul, Umapada Pal, Swapan Kumar Pradhan
Summary: This study investigates the synthesis and thermoelectric performance of Bi2Te3 nanocrystals. The thermoelectric properties of the nanocrystals are significantly improved through thermal annealing treatment.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Physics, Condensed Matter
Arun Raphel, Appu Kumar Singh, P. Vivekanandhan, S. Kumaran
Summary: The study successfully synthesized a high-density nanocrystalline lead-tin-selenium-tellurium high-entropy alloy, achieving excellent thermoelectric performance by reducing lattice thermal conductivity.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Energy & Fuels
Mehmet Erman Mert
Summary: The study investigated the efficiency of hydrogen production by doping nickel foam precursors with nickel, cobalt particles, and decorating with silver nano-domes. The catalyst NF/NiCo-2/Ag showed the best performance in terms of lower hydrogen overpotential, higher HPE, stability, and response during the electrolysis process in 1 M KOH.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Tsutomu Kanno, Hiromasa Tamaki, Masato Yoshiya, Hiroshi Uchiyama, Sachiko Maki, Masaki Takata, Yuzuru Miyazaki
Summary: A study on Mg3Sb2 revealed it to be heavily disordered with Frenkel defects and charge-neutral defect complexes. This compound exhibits exotic n-type dopability and a deviation from the standard temperature dependency in terms of thermal conductivity.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Munmun Basak, Md Lutfor Rahman, Md Farid Ahmed, Bristy Biswas, Nahid Sharmin
Summary: Cobalt ferrite nanoparticles were synthesized using co-precipitation technique with different precipitating agents, affecting the structure and size distribution. Various analysis methods showed highly correlated results, with SSP method being the most compatible.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Cody Kunka, Apaar Shanker, Elton Y. Chen, Surya R. Kalidindi, Remi Dingreville
Summary: Traditional diffraction techniques are limited by the difficulty of decoding desired material information, but using machine learning and feature identification can more comprehensively and accurately predict structural information.
NPJ COMPUTATIONAL MATERIALS
(2021)
Article
Multidisciplinary Sciences
Lutfor Rahman, Salina Rahman, Bristy Biswas, Md. Farid Ahmed, Moksodur Rahman, Nahid Sharmin
Summary: M-type strontium hexaferrite (SrM) was synthesized using co-precipitation technique with different sintering temperatures and mole ratios. The synthesized SrM was characterized and its properties were investigated. The structural parameters, particle size, and magnetic properties of the samples were found to vary with calcination temperature and composition. The synthesized SrM showed potential applications in magnetic recording media and photocatalysis due to its low coercivity, high saturation magnetization, and low band gap energy.
Article
Chemistry, Physical
Sanyukta Ghosh, Umasankar Rout, Krushna Kumari Raut, Anirudha Karati, Gerda Rogl, Peter Franz Rogl, Ernst Bauer, B. S. Murty, Ramesh Chandra Mallik
Summary: Filling the voids of a skutterudite material with suitable electropositive elements can greatly affect the power factor by altering carrier concentration. Doping and filling can further enhance the thermoelectric properties. Electropositive n-type fillers have been successfully used in Co4Sb12. In this study, Fe was substituted as a p-type dopant in S0.15Co4Sb12, resulting in the highest zT value.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Iztok Naglic, Blaz Leskovar, Zoran Samardzija, Bostjan Markoli
Summary: This study investigated the influence of gallium addition on the phases formed in Al-Mn alloys during casting, revealing that an increase in gallium content led to the formation of IQCs and DQCs in the alloys. Microanalysis showed that IQCs contained more gallium and less manganese compared to DQCs.
Article
Nanoscience & Nanotechnology
Taylan Ors, Fanny Gouraud, Vincent Michel, Marc Huger, Nathalie Gey, Jean-Sebastien Micha, Olivier Castelnau, Rene Guinebretiere
Summary: Pure zirconia undergoes two solid-state phase transitions from the liquid state to room temperature, with the last transition being martensitic and leading to large volume variations and shear strains. Elastic and inelastic behaviors of zirconia-based materials are strongly influenced by the strain and stress fields induced by this transition. The strains map at the crystal scale in zirconia polycrystals shows huge fluctuations in deviatoric elastic strain, with associated stress levels in the range of 5 GPa and stress gradients of 1 GPa μm(-1).
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Shrabani Paul, Umapada Pal, Swapan Kumar Pradhan
Summary: Antimony telluride nanoparticles of different sizes were fabricated by mechanical alloying and annealing, and their grain growth, electrical, and thermoelectric properties were studied. Thermal annealing significantly improved electrical conductivity and thermoelectric figure of merit, while reducing grain size improved the thermoelectric performance by lowering thermal conductivity. The temperature-dependent Lorenz number was used to analyze the electronic contribution to total thermal conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Masaki Tahara, Kazuya Hasunuma, Hideki Hosoda
Summary: This study investigated the decomposition process of the isothermal alpha '' phase in beta-Ti alloys, and found that the resulting alpha + beta dual phase inherited the microstructural characteristics of the alpha ''(iso) phase. The research results indicate the existence of a strict variant selection rule between the decomposed alpha and beta phases, with a specific variant combination observed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Edgars Butanovs, Alexei Kuzmin, Sergei Piskunov, Krisjanis Smits, Aleksandr Kalinko, Boris Polyakov
Summary: The study demonstrates the growth of high-quality few-layer ReS2 using pre-deposited rhenium oxide coating on different semiconductor material nanowires, creating novel core-shell heterostructures for energy applications involving photocatalytic and electrocatalytic hydrogen evolution.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Taejun Ha, Sang-In Lee, Jihyun Hong, Young-Su Lee, Dong-Ik Kim, Jin-Yoo Suh, Young Whan Cho, Byeongchul Hwang, Joonho Lee, Jae-Hyeok Shim
Summary: The microstructure and hydrogen storage properties of as-cast and annealed TiFe-6 wt % ZrCr2 alloy samples were investigated. Both samples exhibited three phases, with the amount of TiFe2 significantly reduced and fragmented in the annealed sample. Both samples were able to be hydrogenated under 31 bar of hydrogen at room temperature, with the annealed sample requiring an incubation period of around 40 hours.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Takashi Takeda, Kousuke Kato, Hajime Kiyono, Naoto Hirosaki
Summary: In this study, single phase powders of green emitting Ba2LiSi7-xAlxN12-xOx:Eu2+ phosphor were successfully prepared by controlling starting compositions, annealing conditions, and reaction vessels. The emission peak shifted depending on the Eu concentration, with the highest intensity observed at 3 at%. The phosphor exhibited a small thermal quenching of luminescence intensity and showed a high internal quantum efficiency of 93% when washed with hydrochloric acid solution.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)