Article
Engineering, Electrical & Electronic
K. Chandramouli, P. Anantha Rao, B. Suryanarayana, Vemuri Raghavendra, Shaik Jesus Mercy, D. Parajuli, Paulos Taddesse, S. Yonatan Mulushoa, Tulu Wegayehu Mammo, N. Murali
Summary: Cu-substituted Ni-Zn-Fe ferrites prepared using sol-gel auto-combustion technique exhibit cubic spinel structures with lattice constant decreasing with Cu doping, while their DC resistivity increases with copper concentration, indicating semiconducting properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Bo Liu, Na Li, Liping Sun, Qiang Li, Lihua Huo, Zhao Hui
Summary: Doped rare earth elements significantly influence the properties of Nd(1.9)Ln(0.1)CuO(4), with Nd1.9Ce0.1CuO4 showing the highest performance in terms of surface oxygen adsorption, DC conductivity, and electrocatalytic activity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
K. D. Martinson, A. A. Ivanov, I. B. Panteleev, V. Popkov
Summary: SPHT-assisted method was used to obtain soft magnetic ceramics based on nanostructured powder of multicomponent lithium ferrite, showing significant influence of particle size, sintering temperature and time on microstructure and properties of the ceramics.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
J. N. B. Sales, R. T. da Silva, L. R. S. Lara, S. L. L. M. Ramos, J. S. Soares, T. A. S. Soares, G. Machado, S. M. Manhabosco, A. B. de Oliveira, H. B. de Carvalho, R. J. C. Batista, H. O. Stumpf, T. M. Manhabosco
Summary: Co-, Ni-, and Mn-doped BiFeO3 (BFO) ceramics were synthesized through a solid-state reaction, showing visible-light response. Co- and Ni-doped BFO samples exhibited enhanced ferromagnetic order at room temperature with secondary phases present in minor quantities. Optical spectra revealed two absorption bands and M - H hysteresis loops suggested enhanced ferromagnetism in the Co- and Ni-doped BFO samples.
CERAMICS INTERNATIONAL
(2021)
Review
Chemistry, Multidisciplinary
Thomas Dippong, Erika Andrea Levei, Oana Cadar
Summary: Research on the synthesis and characterization of nanosized ferrites has increased significantly over the past decade, leading to the identification of various new applications for these materials. Different synthesis methods and applications, as well as the properties and advantages of MFe2O4 (M = Co, Cu, Mn, Ni, Zn) nanoparticles, have been reviewed in the paper. Nanosized ferrites possess good magnetic, electrical, mechanical, and chemical properties, making them suitable for a wide range of potential applications in various fields.
Article
Materials Science, Ceramics
You-Dong Kim, Ja-Yoon Yang, Muhammad Saqib, Kwangho Park, Ji-seop Shin, Minkyoung Jo, Kwang Min Park, Hyung-Tae Lim, Sun-Ju Song, Jun-Young Park
Summary: The study focuses on Ba1-xNdxFeO3-delta as a potential air electrode material for reversible solid oxide cells. Doping Nd3+ into Ba-sites enhances electronic conductivity and reduces impurity phases, resulting in a material suitable for application in RSOCs. The lower doping concentration of Nd3+ leads to higher catalytic activity due to the creation of additional oxygen vacancies.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Xiang Yu, Tianyu Yang, Ruoshui Liu, Di'an Wu, Daming Tian, Tianshi Zhou, Haitao Yan, Shuli He, Hao Zeng
Summary: In this study, the efficiency of alternating current magnetic field and near-infrared heating is enhanced by co-doping Zn and Co in magnetite nanoparticles. Optimum magnetic anisotropy is achieved by tuning the doping concentration to maximize the loss power under each magnetic field. The specific loss power of the nanoparticles greatly exceeds previous levels, making it a promising nanoplatform for multi-modal local hyperthermia therapy.
Article
Materials Science, Multidisciplinary
Artem Shiryaev, Konstantin Rozanov, Vladimir Kostishin, Dmitry Petrov, Sergey Maklakov, Arthur Dolmatov, Igor Isaev
Summary: The use of mixing rules in predicting the properties of composite materials and coatings is highly valuable. This study focuses on the application of mixing rules to permittivity and permeability and the retrieval of intrinsic properties of inclusions. The experimental results show that there are differences between the mixing rules for permittivity and permeability in composites, which can be attributed to the non-ideal electrical contacts between neighboring inclusions.
Article
Chemistry, Physical
Liyuan Sun, Dewei Li, Hongli Du, Jichao Zhu, Lifang Hu, Dongcai Guo
Summary: The rare earth oxide promoted transition metal composite catalyst displays outstanding ORR performance and stability, suitable for rechargeable Zn-air batteries, with potential application prospects in the field of energy conversion.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Jiayi Chen, Xin Gao, Xiaodong Chen, Zheng Zhen, Ya Chen, Xiantai Zeng, Lifeng Cui
Summary: This review summarizes the recent research progress on the electrochemical performance and CO2 reduction mechanism of perovskite oxide-based cathodes in solid oxide electrolysis cells (SOECs). The potential solutions to degradation and the effects of different modification methods on the performance of perovskite cathodes are also discussed.
MATERIALS TODAY PHYSICS
(2023)
Article
Materials Science, Ceramics
Timmy Reimann, Beate Capraro, Heike Bartsch, Joerg Toepfer
Summary: The sintering behavior and magnetic properties of Ni-Cu-Zn ferrites were studied, revealing that shrinkage shifts to lower temperature with increasing Cu content. The addition of Bi(2)O(3) sintering aid enhances the sintering shrinkage. The fabricated ferrites exhibit good performance at high temperatures.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2021)
Article
Chemistry, Applied
Shiwei Wang, Jinhai Yang, Shiqiang Wang, Ning Zhao, Fukui Xiao
Summary: CO2 hydrogenation to methanol is an important technology for carbon utilization, and Cu-Mn-Zn/ZrO2 catalysts have been studied for their performance in this process. The addition of Zn improved the catalytic performance, with Cu3MnZn0.5Zr0.5 showing the highest CO2 conversion (7.14%) and methanol selectivity (69.74%) at 260 degrees C and 5 MPa. XPS analysis revealed that Zn doping replaced Cu in the Cu1.5Mn1.5O4 spinel, forming ZnOx and increasing the oxygen defects, leading to higher methanol selectivity. The increased Cu content promoted H2 activation and *CO3 hydrogenation to *HCOO, thereby enhancing CO2 conversion.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Thermodynamics
B. L. Shinde, U. M. Mandle, A. M. Pachpinde, K. S. Lohar
Summary: Ferro spinels with varying Al3+ content were synthesized using a co-precipitation method, showing decreased lattice parameter and specific absorption bands in the infrared spectrum with increasing Al3+ concentration. Microstructures of the calcinated samples revealed porous characteristics in the ferrite samples.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Materials Science, Multidisciplinary
Surendra Singh, Navendu Goswami
Summary: In this paper, Zinc-Copper ferrite nanoparticles were synthesized using a novel technique, and their crystal structure, magnetic properties, and ferroelectric properties were systematically investigated.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Chemistry, Physical
David J. Arnot, Noah B. Schorr, Igor V. Kolesnichenko, Timothy N. Lambert
Summary: This work demonstrates the utilization of Cu as the cathode active material in alkaline Zn batteries through the formation of nanoscale carbon-coated Cu/Bi particles. The carbon coating provides consistent cycling performance and prevents the formation of detrimental Cu2O structures. Various characterization techniques were used to analyze the properties of the resulting particles. This study provides further insight into methods for realizing a Cu-based cathode for rechargeable alkaline Zn batteries.
JOURNAL OF POWER SOURCES
(2022)
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)