Article
Materials Science, Multidisciplinary
Z. H. Nie, Y. H. Hou, F. Y. Wang, W. Li, Z. S. Pang, H. Y. Mao, Y. L. Huang
Summary: Regulating Ce valence and optimizing the intergranular phase can effectively improve the magnetic properties of alloys, with CeO2 phase being particularly beneficial for enhancing coercivity. The optimum magnetic properties can be achieved in the alloy with x = 0.3, which has a more uniform microstructure and higher thermal stability compared to other compositions.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Munan Yang, Sangen Luo, Sajjad Ur Rehman, Chao Liu, Jiajie Li, Xiaoqiang Yu, Longgui Li
Summary: The (Nd1-xCex)(31.5)Fe67.5B1 (x = 0, 0.15, 0.2, 0.25, 0.3, 0.5, 0.75 wt%) alloys were prepared by rapid solidification method. It was observed that the coercivity significantly increased to 1427.33 kA/m at x = 0.2, where Ce3+ proportion was high. The change in Ce valence state affects the magnetic properties, with Ce3+ promoting magnetic hardening in Ce2Fe14B type materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
G. M. Li, Z. J. Peng, X. L. Chen, K. H. Ding, P. Sorokin, A. Perumal, J. H. Chen, X. D. Xu
Summary: This study investigates the microstructure and magnetic properties of a sintered magnet with Ce substitutions. The addition of Ce resulted in lattice contraction, with further increase in Ce content leading to a suppression in lattice contraction. The magnets with higher Ce content exhibited the REFe2 phase at the expense of a reduced mass fraction of the REOx phase. The valence state of Ce changed from a mixed state to a trivalent state, and a bi-layer interfacial structure was formed between the RE2Fe14B and the REFe2 phases.
Article
Materials Science, Multidisciplinary
Lila Ashi, Zhiqiang Xie, Hongfei Sun, Jie Wang, Kunlan Huang
Summary: This study proposed an electromagnetic coupling treatment (EMCT) to relieve the residual stress of thin-walled 7050 aluminum alloy parts induced by machining. It was found that EMCT had a significant effect on residual stress relief (13.3-89.7%). The energy input by EMCT promoted dislocation movement, resulting in the uniform distribution of microplastic strain, the release of stored elastic strain energy, and the relief of residual stress.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Applied
Chuanjia Zhao, Qingzheng Jiang, Sajjad Ur Rehman, Xiang Li, Youwei Chen, Jie Song, Zhenchen Zhong
Summary: In this study, Nd27-xLa3YxFebalAl0.1Cu0.1B1 alloys were fabricated and their magnetic properties and microstructure were examined. The results showed that the addition of La and Y can improve the magnetic properties, with La mainly distributed in the grain boundary phases refining the grains and Y enhancing the short-range exchange coupling.
JOURNAL OF RARE EARTHS
(2022)
Article
Physics, Applied
Shuo Huang, Zhihua Dong, Wangzhong Mu, Valter Stroem, Guocai Chai, Lajos Karoly Varga, Olle Eriksson, Levente Vitos
Summary: The study focused on the ab initio-assisted design and synthesis of high-entropy alloys, with Al0.44Cr0.25MnFeCo0.05Ni0.2 alloy showing promising magnetocaloric properties near room temperature. This suggests potential applications in magnetic refrigeration systems.
APPLIED PHYSICS LETTERS
(2021)
Article
Crystallography
Xiang Xiao, Zeyu Zhou, Cheng Liu, Lingfei Cao
Summary: This study investigates the microstructure and intergranular corrosion behavior of 2024 alloy with varying Cu and Mg content. It is found that theta (Al2Cu) and S (Al2CuMg) particles precipitate along grain boundaries after quenching. The presence of these particles greatly affects the intergranular corrosion susceptibility. The alloy's resistance to intergranular corrosion decreases with higher Cu and Mg contents.
Article
Chemistry, Physical
Olena Palasyuk, Michael Onyszczak, Tae-Hoon Kim, Lin Zhou, Matthew J. Kramer, Sergey L. Bud'ko, Paul C. Canfield, Andriy Palasyuk
Summary: Ce(Co1-xFex)(4.4)Cu-0.6 is a composite, hard magnetic system based on the CaCu5-type structure, showing unique magnetic properties and microstructure essential for permanent magnets. Heat treatment can lead to the formation of a nanostructure similar to Sm-Co permanent magnets.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Mechanical
Rajneesh Jaisawal, Vidit Gaur, Shahnawaz Ahmed
Summary: This study aimed to investigate the fatigue properties of AA5086-H321 and its weld joints. The weld joints showed similar hardness and ultimate tensile strength as the base alloy, but with slightly reduced elongation. The endurance limits of the weld joints were either higher or the same as compared to that of the base alloy. The fatigue lives of weld joints were increased due to crack growth retardation during intergranular fatigue crack propagation.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Chemistry, Physical
Y. H. Hou, Z. H. Nie, Y. F. Yao, Z. J. Wu, Q. Feng, W. Li, J. M. Luo, Y. L. Huang
Summary: Understanding the evolution of phase and microstructure is crucial for preparing high performance magnets. In this study, Ce-Fe-B magnets with different Ce contents were prepared via hot deformation. The results showed that the content of CeFe2 phase increased with increasing Ce content and its distribution pattern varied. The presence of CeFe2 phase improved the magnetic isolation effect and the overall performance of the magnets. In addition, the distribution of Pr and Cu elements differed between different regions of the magnets. The study concluded that the formation of (Pr, Ce)2Fe14B phase and increased magnetic isolation effects contributed to the improved coercivity, remanence, and magnetic energy product.
Article
Materials Science, Multidisciplinary
Chunming Wang, Luming Zeng, Wenlong Zhang, Fuqian Tang, Wucheng Ding, Sufen Xiao, Tongxiang Liang
Summary: The addition of minor cerium refines the microstructure, enhances the strength and ductility of the alloy, and improves its corrosion resistance.
MATERIALS CHARACTERIZATION
(2021)
Article
Metallurgy & Metallurgical Engineering
E. P. Silva, R. H. Buzolin, F. Marques, F. Soldera, U. Alfaro, H. C. Pinto
Summary: Mg-Zn-Zr (ZK) alloys have high mechanical strength, but are susceptible to hot cracking due to the formation of low melting point precipitates. Adding rare earths can improve the alloy's performance. Ce-base mischmetal addition can enhance hot rolling behavior, refine grain size, and improve mechanical properties of ZK60 alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Physics, Applied
Weijia Zeng, Hangfu Yang, Qiong Wu, Minxiang Pan, Nengjun Yu, Yong Gu, Hongliang Ge
Summary: The addition of an appropriate amount of low melting point Ga element can enhance the hard magnetic properties and phase content of Ce17Fe78-xB6Gax alloys, resulting in improved magnetic properties for the alloy with x = 1. The enhanced magnetic properties are attributed to the strongest magnetic interaction between grains due to the Ga addition, as analyzed based on the microstructure.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2021)
Article
Chemistry, Multidisciplinary
Jai-Lin Tsai, Shi-Min Weng, Cheng Dai, Jyun-You Chen, Xue-Chang Lu, Ting-Wei Hsu
Summary: A FePt(B, Ag, C) granular film was successfully formed by post-annealing B4C/FePt layers at a high substrate temperature, exhibiting high magnetic properties. The study showed that the magnetic anisotropy and coercivity of the film varied with temperature. Additionally, high-resolution TEM images revealed the presence of coupled FePt grains grown on a single MgTiON grain.
Article
Materials Science, Multidisciplinary
Yi Xu, Zhou Liu, Xinghua Zhu, Zheliang Jiang, Hui Chen, Ning Wang
Summary: Through the study, it was found that the addition of different amounts of Ce element can significantly improve the mechanical properties of Ti6Al4V. The addition of 0.5 wt% Ce significantly improves the tensile strength and elongation, while the addition of 0.3 wt% Ce significantly optimizes the wear resistance. This is due to the significant grain refinement and the complete coherent relationship between ceria and the Ti6Al4V matrix.
Article
Chemistry, Physical
Brandon C. Vance, Pavel A. Kots, Cong Wang, Jack E. Granite, Dionisios G. Vlachos
Summary: In this study, we report the application of a new and inexpensive catalyst Ni/SiO2, which can convert polyethylene into valuable n-alkane products under mild conditions. We reveal a new mechanism of long-alkane hydrogenolysis and demonstrate that the catalyst can handle multiple plastics, broadening the scope of catalysts for polyolefin hydrogenolysis and unleashing the potential for managing plastic waste.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Fanle Bu, Chaoqiu Chen, Yu Yu, Wentao Hao, Shichao Zhao, Yongfeng Hu, Yong Qin
Summary: A profound understanding of the nature of nuclearity effects is crucial for designing high-performance sub-nanocatalysts with low nuclearity, yet it remains a longstanding challenge. By employing atomic layer deposition, we precisely synthesized Fe sub-nanocatalysts with adjustable nuclearity (Fe-1-Fe-4) immobilized on N,O-co-doped carbon nanorods (NOC). The nuclearity-dependent electronic properties and spin configuration of the Fe sub-nanocatalysts dominate the activation modes of H2O2 and the adsorption strength of active O species on Fe sites for C-H oxidation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Shenglu Lu, Yaxuan Jing, Shengchao Jia, Mohsen Shakouri, Yongfeng Hu, Xiaohui Liu, Yong Guo, Yanqin Wang
Summary: The influence of Ru chemical state on the positions of C-C bond cleavage was investigated. Positively charged Ru species were found to favor the hydrogenolysis of the internal C-secondary-C-secondary bond, inhibiting methane production. A Ru/CeO2-I catalyst with plenty of Ru delta+ species was designed and proved efficient for the hydrogenolysis of real waste polyethylene plastics. This work will guide catalyst design to enhance the selective production of liquid alkanes.
Article
Engineering, Environmental
Yue Lian, Yujing Zheng, Zhifeng Wang, Yongfeng Hu, Jing Zhao, Huaihao Zhang
Summary: In this study, a composite material (ppy@TNO-x@NC) consisting of Ti2Nb10O29 with modified vacancy defects and an ultrathin polymer coating was developed for high-capacity and stable performance in lithium-ion batteries and hybrid capacitors.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Geochemistry & Geophysics
Reza Deevsalar, Yuanming Pan, Ryuichi Shinjo, Luke Milan, Ke-han Song, Qunfeng Xiao, Mohsen Shakouri, Alisa Rae-Ling Paterson, Yongfeng Hu
Summary: Mafic-ultramafic cumulates in the Malayer Plutonic Complex (MPC), Western Iran, provide records of basaltic magma chambers' conditions and processes during the Middle Jurassic. The evidence suggests a rising redox state during the fractionation process, consistent with the differentiation of hydrous arc magmas. The shift in fO(2) from sulfide-saturated to sulfate-bearing is accompanied by changes in the differentiation path from transitional tholeiitic to calc-alkaline.
Article
Materials Science, Multidisciplinary
Fenglan Long, Lei Wang, Sajjad Ur Rehman, Jun Zhang, Shuqi Shen, Biyun Peng, Mengjia Wei, Wenmiao Zhang, Yifeng Hu, Gang Fu, Tongxiang Liang
Summary: ZnFe2O4@Zeolitic imidazolate framework-8 (ZIF-8) composites were prepared using Sol-Gel self-propagating combustion method and in situ growth method. The honeycomb-like structured ZnFe2O4@C composites obtained through carbonization at 800°C in Ar atmosphere exhibited enhanced electromagnetic wave absorption properties. The carbon content of the composites could be adjusted by the ZIF-8 coating. The composites with 5% and 10% ZIF-8 (wt%) showed excellent reflection loss values and wide effective absorption bandwidth in the frequency range of 7.6-11.3 GHz.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Chemistry, Physical
Yang Chen, Ting He, Qiming Liu, Yongfeng Hu, Hao Gu, Liu Deng, Hongtao Liu, Youcai Liu, You-Nian Liu, Yi Zhang, Shaowei Chen, Xiaoping Ouyang
Summary: Single-atom catalysts with adjacent Fe nanoclusters supported on nitrogen-doped carbon aerogels show enhanced oxygen reduction reaction activity and anti-oxidation stability, resulting from increased 3d electron density and decreased magnetic moment of Fe atomic centers. A flexible zinc-air battery using these catalysts achieves remarkable performance, even at -40 degrees C, with high open circuit voltage, power density, and excellent durability after 2300 continuous cycles. These results highlight the significance of electronic manipulation in enhancing the durability of single atom catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Green & Sustainable Science & Technology
Yongqing Bai, Zonglun Cao, Yongfeng Hu, Jing Zhao, Huaihao Zhang
Summary: In this study, a thermoconductive lignin-based hydrogel CaLS-CTS/h-BN was designed and synthesized for thermal energy conservation and soil self-remediation in thermal recovery of heavy oil. The gel improved the thermal efficiency and cumulative oil-steam ratio of steam flooding, reduced input energy, and enhanced heating profile and heat transfer. It also facilitated the biodegradation of the gel, alleviated formation damage, and increased the degradation of petroleum pollutants in soil. Additionally, it chelated and immobilized heavy metal contaminants in oilfield soil. This study provided a green adjuvant agent for cleaner production of heavy oil.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
Priya Karna, Zou Finfrock, Junjie Li, Yongfeng Hu, Dong-Sheng Yang
Summary: Copper has been widely used as a cost-effective and environmentally friendly metal catalyst in cross-coupling reactions. This article presents a water-soluble active molecular catalyst for Suzuki-Miyaura cross-coupling reactions using copper iodide as the precatalyst. The catalyst, identified as Cu(OH) in its singlet electronic state, is stable for at least 4 weeks in aqueous solutions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Jian Jin, Joshua Wicks, Qiuhong Min, Jun Li, Yongfeng Hu, Jingyuan Ma, Yu Wang, Zheng Jiang, Yi Xu, Ruihu Lu, Gangzheng Si, Panagiotis Papangelakis, Mohsen Shakouri, Qunfeng Xiao, Pengfei Ou, Xue Wang, Zhu Chen, Wei Zhang, Kesong Yu, Jiayang Song, Xiaohang Jiang, Peng Qiu, Yuanhao Lou, Dan Wu, Yu Mao, Adnan Ozden, Chundong Wang, Bao Yu Xia, Xiaobing Hu, Vinayak P. Dravid, Yun-Mui Yiu, Tsun-Kong Sham, Ziyun Wang, David Sinton, Liqiang Mai, Edward H. Sargent, Yuanjie Pang
Summary: The carbon dioxide and carbon monoxide electroreduction reactions are promising pathways for decarbonization of chemical manufacture. By dispersing a low concentration of copper atoms in a host metal, acetate can be selectively synthesized from carbon monoxide. Through catalyst design and reactor engineering, high selectivity and Faradaic efficiency for acetate production have been achieved.
Article
Engineering, Environmental
Yujing Zheng, Yue Lian, Hongliang Bao, Haixian Guo, Yongfeng Hu, Jing Zhao, Huaihao Zhang
Summary: Biological self-assembly is utilized in this study to combine biomass membrane with carbon membrane, forming a Janus membrane (FAS-MC@M) with low energy consumption and high efficiency. The biomass-derived carbon membrane has superior photothermal conversion efficiency and enhanced salt resistance. The biomass layer ensures rapid water transfer to the Janus interface and inhibits salt crystals formation. Furthermore, it provides thermal insulation properties and protection against oil pollution, resulting in desirable evaporation desalination potential.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Fanhui Meng, Peng Zhang, Lixuan Ma, Guinan Yang, Riguang Zhang, Baojun Wang, Yongfeng Hu, Zhong Li
Summary: The use of Ga-Zr oxide doped SAPO-34 zeolite enables high selectivity and conversion rate for light olefins, making it a potential catalyst for direct conversion of syngas to olefins, aromatics, and liquid fuels.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Lili Zhang, Wenmiao Zhang, Sajjad Ur Rehman, Shuqi Shen, Yongxian Liu, Fenglan Long, Hongzhang Du, Weiwei Dong, Yifeng Hu, Haiping Zou, Tongxiang Liang
Summary: The surface modified flaky FeSiAl magnetic microwave absorbing material was prepared by controlled oxidation heat treatment and was compounded with MOFs material. The dielectric polarization characteristics and the microwave loss mechanism for the heterogeneous structure are analyzed. The obtained MOFs@FeSiAl balances the electromagnetic wave attenuation ability and the impedance matching, thus achieving excellent microwave absorbing properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Siyu Wang, Xinran Ning, Xiaohui Liu, Mohsen Shakouri, Yongfeng Hu, Haiyang Yuan, Pengfei Liu, Xunyu Lu, Yong Guo, Yanqin Wang
Summary: This study reports a novel HER catalyst with oxygen-rich nitrogenated carbon synthesized from renewable lignin and low-cost melamine as the catalyst support. The catalyst exhibits low overpotential and excellent stability, demonstrating the crucial role of oxygen in nitrogenated carbon for HER and providing a strategy for developing high-efficient HER catalysts.
Article
Chemistry, Multidisciplinary
Jing Zhang, Yufeng Zhao, Wanting Zhao, Jing Wang, Yongfeng Hu, Chengyu Huang, Xingli Zou, Yang Liu, Dengsong Zhang, Xionggang Lu, Hongjin Fan, Yanglong Hou
Summary: A spin transition in a Mg-Fe dual-site catalyst is achieved by taking advantage of the local crystal field distortion induced by the large ionic radii difference between Fe/Mg. The as-synthesized catalyst demonstrates a low overpotential of 224 mV at 10 mA cm-2 for oxygen evolution reaction and an electrolysis voltage of only 1.542 V at 10 mA cm-2 for the overall water splitting.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
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)
