Article
Engineering, Electrical & Electronic
Dan Jin, Xiaolong Yang, Ying Wei
Summary: In this study, cobalt-nickel alloy nanoparticles were successfully grown on the surface of carbon fibers after surface treatment. The resulting CoNi alloy/CFs composites exhibited designable electromagnetic parameters, ultra-thin thickness, low density, wide absorption frequency band, and strong electromagnetic absorption capacity. The effects of permittivity and permeability on the absorbing properties of the composites were also investigated. The prepared CoNi alloy/CFs composites have great application prospects as electromagnetic wave absorbing materials.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
Shuang Zhang, Fan Zhang, Yingying Xie, Huanhuan Niu, Yaya Li, Hailong Wang, Rui Zhang, Hongxia Li, Xiaohui Wang, Bingbing Fan
Summary: CoNi@Ti3C2TX composites with CoNi alloy particles decorated on the surface and interlayer of Ti3C2TX were successfully synthesized by a simple solvent thermal reduction method. The introduction of CoNi particles significantly enhanced the soft magnetic properties of the composites. By adjusting the electromagnetic parameters, the optimal electromagnetic absorption performance was achieved.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Lizhen Hou, Xing Zhen, Linlin Liu, Daitao Kuang, Yangyang Gao, Heng Luo, Lianwen Deng, Chuansheng Chen, Shiliang Wang
Summary: This study presents a one-step method for synthesizing magnetic alloy-C core-shell nanoparticles with tunable elemental components, showing performance variations under different Co/Ni molar ratios. These nanoparticles exhibit stability at low temperatures and slight oxidation at higher temperatures.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Physical
Jacob Elkins, Jeotikanta Mohapatra, Meiying Xing, Julian Beatty, J. Ping Liu
Summary: Ferromagnetic nanowires with high coercivity were synthesized through a thermal decomposition method, showing a decrease in coercivity with increasing Ni content and increased resistance to oxidation. The addition of Ni also lowered the blocking temperature of CoNiO grains, leading to a shift in the switch-on temperature for the exchange bias field to lower temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Abdalla Obeidat, Bilal Al-Aderah, Mohammad-Khair Qaseer
Summary: In this study, we investigated the effects of oxygen and nitrogen doping on the magnetic properties of CoNi alloy using density functional theory. Our calculations revealed that CoNi:ONi alloy exhibited enhanced saturation magnetization and slightly reduced magnetic crystalline anisotropy, while CoNi:OCo alloy showed a small reduction in both parameters. On the other hand, CoNi:NCo and CoNi:NNi alloys consistently exhibited reductions in saturation magnetization and magnetic crystalline anisotropy. Therefore, CoNi:ONi alloy could be suitable for permanent magnets.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Electrochemistry
Shuli Yi, Chengbo Yin, Hongli Lin, Xiujuan Leng
Summary: The concentration of cobalt sulfate in the plating solution affects the magnetic properties, surface morphology, and microstructure of the Co-Ni coating. Increasing the concentration of cobalt sulfate can enhance the cobalt content and thickness, refine the particle size, and reduce the surface roughness, thereby improving the magnetic properties.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2022)
Article
Chemistry, Physical
Qingyue Xue, Yibo Wang, Min Jiang, Ruiqi Cheng, Kaiqi Li, Tianshuo Zhao, Chaopeng Fu
Summary: Developing cost-effective electrocatalysts is crucial in improving the performance of metal-air batteries. In this study, a CoNi alloy encapsulated in an N-doped carbon framework (CoNi@NC) with high magnetization was prepared using nanoalloying, and an external magnetic field was used to enhance the ORR performance. The electronic structure of CoNi@NC was optimized, resulting in Pt/C-comparable ORR performance. The CoNi@NC-based Al-air battery with magnet exhibited higher power density and better durability compared to Pt/C. This work provides a promising approach to enhancing oxygen reduction activity for metal-air batteries using magnetic induction.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Qi Wang, Jinshen Ren, M. Shire Sudi, Yuqin Dou, Wei Zhao, Aijian Wang, Long Zhao, Danhong Shang, Weihua Zhu
Summary: The combination of nitrogen-doped Mo2C and CoNi alloy to form a hybrid architecture is an effective way to produce hydrogen through electrochemical water splitting, showing remarkable HER activity in alkaline media. The efficient electrocatalytic performance is attributed to highly exposed active sites, fast reaction kinetics, and improved charge-transfer efficiency from the synergistic effect.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Bo Wen, Guorui Yang, Yifan Wang, Xiaofeng Liu, Xianjun Weng, Dengwei Jing, Shujiang Ding
Summary: In this study, a heterogeneous structure containing Mo2C, metal alloys, and carbon nanotubes was synthesized and a bimetallic regulation mechanism was implemented to enhance the electromagnetic wave absorption performance. The material exhibited strong interfacial polarization loss at high frequencies and showed a wide absorption bandwidth and low reflection loss.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Physical
M. S. P. Sudhakaran, Ranjithkumar Raju, Ji Ho Youk
Summary: Polypyrrole-derived nitrogen-doped carbon nanotubes (NCNTs) decorated with CoNi alloy NPs (CoNi@NCNT) were used as high-performance electrode materials. The CoNi@NCNT-20 composite exhibited a specific capacitance of 316 F g-1, two times higher than the pristine NCNT electrode. The synergistic effects of NCNT and CoNi alloy NPs enabled fast ion transport and excellent cycling stability.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
You Sub Kim, Hobyung Chae, E-Wen Huang, Jayant Jain, Stefanus Harjo, Takuro Kawasaki, Sun Ig Hong, Soo Yeol Lee
Summary: In this study, a non-equiatomic high-entropy alloy with a stable solid solution and high stacking fault energy was successfully manufactured. The alloy exhibited a good combination of strength and ductility, which can be attributed to the active motion of dislocations and lattice distortion.
Article
Nanoscience & Nanotechnology
E. Povolyaeva, S. Mironov, D. Shaysultanov, N. Stepanov, S. Zherebtsov
Summary: A new medium-entropy Fe-65(CoNi)(25)Cr9.5C0.5 alloy was investigated for its properties at room and liquid nitrogen temperatures. The alloy exhibited high strength, good ductility, and excellent fracture toughness at cryogenic temperatures. The microstructure analysis suggested a phase transition induced by deformation, and the cold-rolled alloy showed improved mechanical properties compared to the as-cast alloy. Substructure strengthening, interphase strengthening, and solid solution strengthening were identified as contributing factors to the alloy's enhanced performance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Saman Sargazi, Mohammad Reza Hajinezhad, Abbas Rahdar, Mahwash Mukhtar, Milad Karamzadeh-Jahromi, Mohammad Almasi-Kashi, Sima Alikhanzadeh-Arani, Mahmood Barani, Francesco Baino
Summary: Nanoparticles of CoNi alloy were successfully synthesized and tested for their cytotoxic effects on cancer cells and in vivo on rats, showing significant toxicity towards breast cancer and oral cavity cancer cells, as well as biochemical and histopathological changes in the rats.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Xue Zhang, Xuelei Tian, Jing Qiao, Xinrui Fang, Kaiye Liu, Chang Liu, Jingpeng Lin, Lutong Li, Wei Liu, Jiurong Liu, Zhihui Zeng
Summary: In this study, carbon encapsulated magnetic composites with rational design of microstructure were developed for achieving high-performance electromagnetic wave absorption. N-doped carbon nanotube (CNT) encapsulated CoNi alloy nanocomposites with diverse heterostructures were synthesized via facile, sustainable autocatalytic pyrolysis. The effects of heterogenous microstructure and composition on the electromagnetic wave absorption performance were investigated, revealing the great promise of the nanocarbon encapsulation protocol for achieving lightweight, high-performance EMW absorption materials.
Article
Materials Science, Multidisciplinary
Shuoqing Yan, Yuhui Peng, Yonghe Deng, Can Cao, Heng Luo, Chuanpin Cheng, Jun He
Summary: This study presents a simple low-temperature in situ hydrothermal method to synthesize novel magnetic-dielectric composites with regulated frequency-dependent electromagnetic parameters. It was found that the CoNi/Ti3SiC2 composites exhibited exceptional microwave absorption performance under thinner thickness, which can be attributed to improved attenuation characteristics and optimized impedance matching.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(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)