Article
Chemistry, Multidisciplinary
Cheng Chang, Jiguo Tu, Yunfei Chen, Mingyong Wang, Shuqiang Jiao
Summary: A low-temperature electro-deoxidation strategy for solid SeO2 was proposed for the first time, and the process and products were analyzed in detail. This has significant implications for short-process and green metallurgy of other characteristic scattered metals.
CHEMICAL COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Mengjun Hu, Rui Tan, Tongxiang Ma, Meilong Hu
Summary: TiC coatings were formed on titanium foam by carbon precipitation reaction during molten salt electrolysis, and the effects of pre-oxidation process, electrolysis time, and molten salt composition on the formation of TiC coatings were explored. The results showed that the pre-formed oxide layer on the titanium foam surface promoted the formation of TiC coating. Prolonging electrolysis time increased coating thickness but also caused excessive growth of TiC particles and coating detachment. Reducing surface tension of molten salt promoted CO32- diffusion in the titanium foam, enabling formation of TiC coating inside the foam titanium. The presence of TiC coating on foam titanium surface increased the hardness and reduced wear amount.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Electrochemistry
Nan Ji, Tiejian Zhu, Hao Peng, Feng Jiang, Wei Huang, Yu Gong
Summary: The study investigated the electrolytic reduction of Gd2O3 and the diffusion coefficient of O2- in LiCl-KCl melts, indicating that under specific conditions, 88.5% of Gd2O3 was reduced to metal.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Namhun Kwon, Jong-Soo Byeon, Hyun Chul Kim, Sung Gue Heo, Soong Ju Oh, Sang-hoon Choi, Seok-Jun Seo, Kyoung-Tae Park
Summary: The study focused on deoxidizing Ti scrap through electrolytic refining and chemical reaction with MgCl2 molten salt electrolysis, resulting in an optimized process for reducing oxygen concentration. By controlling conditions and parameters, a more efficient deoxidation was achieved.
Article
Materials Science, Ceramics
Mingge Yan, Qingming Xiong, Juntong Huang, Xifeng Hou, Lei Zhang, Xibao Li, Zhijun Feng
Summary: The study investigated the influence of carbon-template-growth mechanism on the synthesis of titanium carbide, showing that the visual morphologies of the TiC products mainly retained the shapes of the original carbon sources, confirming the control role of the carbon-template-growth mechanism in TiC formation.
CERAMICS INTERNATIONAL
(2021)
Article
Electrochemistry
Xuehua Wang, Liwen Zhang, Xiaoli Xi, Zuoren Nie
Summary: In this study, tungsten was extracted from LiCl-KCl-Li2WO4 molten salt, resulting in reduced electrolysis temperature and energy consumption, improved dissolution efficiency and current efficiency. Furthermore, the oxidation-reduction process of tungsten ion in tungstate was investigated, and spherical tungsten powder clusters were successfully prepared.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Di Zu, Yiran Ying, Zhihang Xu, Gao Chen, Liqi Bai, Safayet Ahmed, Zezhou Lin, Ye Zhu, Ahmed Mortuza Saleque, Sixuan She, Molly Mengjung Li, Hui Wu, Yuen Hong Tsang, Haitao Huang
Summary: This research proposed a novel low-temperature ternary molten salt-lithium reduction method to create controllable oxygen vacancies and manipulate the surface microstructure of TiO2 photocatalyst. The optimized TiO2 showed a significant improvement in the photocatalytic performance, with a 10-fold increase in the degradation rate of RhB and hydrogen generation compared to pristine TiO2. The synergetic effects of dual surface defects, including reduced band gap, enhanced charge separation efficiency, and increased surface area, played a crucial role in improving the overall efficiency of the photocatalyst.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Analytical
Stenio Cristaldo Heck, Eduardo Radovanovic
Summary: The production of Ti and Nb metals through the FFC (Fray?Farthing?Chen) process involves electrochemical reactions reducing metal oxides and the main kinetic obstacle is oxygen diffusion, which depends on process temperature, oxides stoichiometry, and diffusion coefficients. Experimental sweep voltammograms and mathematical modeling were used to obtain kinetic parameters for Ti and Nb production, providing diffusion coefficients, exchange current densities, and cathodic transfer coefficients for the oxides involved in the reduction pathway.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Electrochemistry
Nan Ji, Hao Peng
Summary: Electrolytic reduction technology is important for industrial metal production. In this study, cyclic voltammetry and square wave voltammetry were used to investigate the electrochemical behaviors of ZnO cathode in a CaCl2-NaCl melt at 873 K. The dissolution-electrodeposition mechanism dominated the electrolytic reduction of ZnO, while direct-reduction from solid phase had a small contribution. Electro-reduction of ZnO was successfully achieved by potentiostatic electrolysis. The feasibility of electro-reduction technology for preparing Zn metal from ZnO material was demonstrated.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Applied
Shusuke Okada, Kenta Takagi
Summary: In this study, molten salt was used as a solvent to enable a reduction-diffusion reaction of calcium below its melting point. When the reaction was carried out with LiCl molten salt below 923K, submicron-sized TbCu7-type Sm-Fe powder was synthesized, and for the first time, single-crystalline TbCu7-type SmFe8.5 powder was also obtained.
JOURNAL OF RARE EARTHS
(2022)
Article
Chemistry, Multidisciplinary
Sanzhao Song, Jian Sun, Jing Zhou, Chengzhi Guan, Zhiwei Hu, Ting-Shan Chan, Xian-Long Du, Xiao Lin, Jun Hu, Linjuan Zhang, Jian-Qiang Wang
Summary: Molten salt synthesis is effective in preparing multicationic oxides at lower temperatures, allowing for the formation of crystalline solids like perovskites. Key factors influencing the process include the type of reaction medium, calcination temperature, ratio of salt, and reaction time. Additionally, the formation of LaOCl as an intermediate plays a crucial role in the phase-selective synthesis of perovskite LCO.
Article
Electrochemistry
Nan Ji, Feng Jiang, Hao Peng, Hao Chen, Wei Huang, Yu Gong
Summary: In this study, the electrochemical behavior of MoO3 in the CaCl2-NaCl melt was investigated using various electrochemical techniques, revealing that MoO3 can be transformed into intermediate compounds and finally reduced to metallic Mo through electrolytic reduction.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Green & Sustainable Science & Technology
Wenju Tao, Jiaxin Yang, Zhibo Liu, Yifan Zhang, Liyu Chen, Shaohua Wu, Jinbo Qiao, Zhengduo Xue, Zhaowen Wang
Summary: This research focused on producing high-value-added Al-Si master alloy by aluminothermic reduction with coal fly ash as the raw material. The effects of reduction time and reducing agent amount on thermal reduction products were investigated. The results showed that an increase in reaction time led to an increase in the mass fraction of Si in the product. The comprehensive recovery of Al and Si in fly ash could reach 87.33% and 84.02%, respectively, through the combination of thermal reduction and electrochemical secondary recovery process.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Electrochemistry
Haoyu Huang, Na Li, Zeng Chen, Zhengyu Ren, Rui Zhang, Meiyue Liu, Putao Zhang, Shengjun Li
Summary: Pure Al-Ni alloy phases (AlNi3, AlNi, Al3Ni2) were successfully prepared by electro-deoxidation in CaCl2-NaCl molten salt, which is a more efficient method compared to traditional methods. It was found that the loss of Al in the electro-deoxidation process was mainly due to the loss of Al2O3 in the molten salt, and this loss could be delayed by increasing the precursor's sintering temperature and the molten salt temperature.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Energy & Fuels
Yafei Shen
Summary: The review article summarized the recent advances in molten salt strategies for CO2 capture and conversion. MgO-based sorbents can efficiently capture CO2 through a reversible carbonation/calcination reaction, and the addition of alkali metal molten salt can greatly promote the CO2 uptake. Molten salts can also be used as activating agents and templates for the synthesis of porous carbons from biomass and plastics. In terms of CO2 conversion, electrochemical reduction in molten salts and the use of molten salts as catalysts can produce carbon materials and fuels.
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)