Article
Nanoscience & Nanotechnology
Ivan S. Pavlov, Anna G. Ivanova, Vladimir P. Filonenko, Igor P. Zibrov, Alexei E. Voloshin, Pavel V. Zinin, Alexander L. Vasiliev
Summary: This study investigates the formation of boron carbide superhard particles through a liquid-phase reaction at high pressure and high temperature. The synthesized particles exhibit a rhombic hexecontahedron morphology with twelve five-vertex stars. Electron microscopy and X-ray diffraction were used to analyze the crystal structure of these particles, revealing multiple cycling twinning rather than quasi-crystalline symptoms. The specific shape of the particles is explained by the decrease of surface energy during formation at high pressure and high temperature.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Aneta Wardak, Witold Chrominski, Anna Reszka, Dominika Kochanowska, Marta Witkowska-Baran, Malgorzata Lewandowska, Andrzej Mycielski
Summary: This study presents a defect analysis in Cd and Te inclusion regions within Bridgman-grown Cd0.95Mn0.05Te crystals for nuclear detectors. Contrary to Cd inclusions causing microcracks, Te inclusions do not generate defects but induce higher stresses. The higher stress from Te inclusions has a smaller impact on charge carrier transport in detectors compared to Cd inclusions, as confirmed by mu tau product measurements.
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
E. P. Skipetrov, E. Bogdanov, B. B. Kovalev, L. A. Skipetrova, A. Knotko, A. Emelyanov, A. N. Taldenkov, V. E. Slynko
Summary: We synthesized a single-crystal Pb1-x-ySnxScyTe ingot and studied the magnetic properties of alloys cut from it. The samples exhibited paramagnetic contribution at low temperatures and high-temperature ferromagnetic ordering in p-type samples, with spin-glass-like behavior and ferromagnetic hysteresis loops detected at temperatures below 100 K.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Farid Labib, Nobuhisa Fujita, Hiroyuki Takakura, Satoshi Ohhashi, Takayuki Shiino, An-Pang Tsai, Ryuji Tamura
Summary: The stability region and atomic structure of the 1/1 cubic crystalline approximant to icosahedral quasicrystal in the Cd-Mg-Ce system were investigated. The study found that the approximant spans a wide compositional range and that Mg addition shifts the stability region to lower temperatures. A new variant of the approximant with different atomic structures was also discovered within the compositional range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Xiaofen Tan, Matthew Weyland, Yu Chen, Timothy Williams, Philip N. H. Nakashima, Laure Bourgeois
Summary: This study investigates voids coated with a monolayer of tin in aluminum alloys, finding that tubular voids can grow to hundreds of nanometers in length under certain heat treatment conditions with high coherence with the Al matrix. The aspect ratios of tubular voids show a strong correlation with the coherence between the tin particle and the arrangement of the tin atoms in the void coating, suggesting potential for future research and applications.
Article
Chemistry, Multidisciplinary
Ziqian Wang, Meng Gao, Tonghua Yu, Siyuan Zhou, Mingquan Xu, Motoaki Hirayama, Ryotaro Arita, Yuki Shiomi, Wu Zhou, Naoki Ogawa
Summary: Stacking order plays a significant role in the properties of van der Waals layered magnets, and recent studies suggest possible different stackings in few-layer crystals. This study combines atomic-scale electron microscopy and theoretical calculations to show that while the bulk stacking persists in bilayers of MnPS3, the local rippling effect lifts the monoclinic symmetry of the few layers. This finding reveals the impact of rippling on the microscopic symmetry of two-dimensional materials and suggests the possibility of approaching the two-dimensional Neel antiferromagnetic honeycomb lattice in MnPS3 without reaching monolayer thickness.
Article
Materials Science, Coatings & Films
Kenichi Ogawa, Kenji Kobayashi, Noriyuki Hasuike, Toshiyuki Isshiki
Summary: A crystal structure analysis revealed three types of stacking faults (SFs) in a beta-Ga2O3 (001) layer grown by halide vapor phase epitaxy (HVPE). These defects were generated from vacancies or displacements of different atomic sites. These findings are of significance for understanding the growth process and defect formation mechanism of the material.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Materials Science, Multidisciplinary
Tian-Xing Yang, Zhan-Xing Li, Chang-Jun Zhou, Yi-Chun Xu, Peng Dou
Summary: FeCrAl oxide dispersion strengthened (ODS) steel is a promising cladding material for Generation IV nuclear reactors due to its superior properties. The morphologies, crystal structures, and metal/oxide interface structures of two FeCrAl ODS steels were studied. The dispersion morphology of oxides in the 3.7Al-0.1Ti-0.6Zr ODS steel was found to be better than that of the 3.3Al-0.5Zr ODS steel. The proportions of different oxides in the two ODS steels were characterized. The mechanisms of oxide formation, polymorphic transition, and strengthening in the ODS steels were discussed.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kosuke Karube, Licong Peng, Jan Masell, Mamoun Hemmida, Hans-Albrecht Krug von Nidda, Istvan Kezsmarki, Xiuzhen Yu, Yoshinori Tokura, Yasujiro Taguchi
Summary: Magnetic skyrmions and antiskyrmions, vortex-like topological spin textures, have been the focus of attention in various research fields. This study investigates the stability of antiskyrmions by controlling the uniaxial magnetic anisotropy of a phosphide compound. The results show that the variation of composition and doping with transition metals significantly affect the magnetic anisotropy, and the stability of antiskyrmions depends on a delicate balance between uniaxial anisotropy and demagnetization energy.
ADVANCED MATERIALS
(2022)
Article
Entomology
Jixing Guo, Zimeng Du, Guangchao Cui, Zheng Wang, Junfang Wang, Xiang Zhou
Summary: In this study, we investigated the external morphology and internal sensilla structures of Tirathaba rufivena using scanning electron microscopy and transmission electron microscopy. The results showed sexual dimorphism in the length and abundance of sensilla, indicating their potential roles in locating host plants and mates.
Article
Chemistry, Multidisciplinary
Hongguang Wang, Gennadii Laskin, Weiwei He, Hans Boschker, Min Yi, Jochen Mannhart, Peter A. van Aken
Summary: This article investigates the magnetic properties and RuO6 octahedral distortion in SrRuO3 nanodots with a size of 30 nm. The existence of oxygen ions and other elements in the nanodots is directly observed through electron microscopy and spectroscopy. It is found that the magnetic anisotropy and octahedral distortion are both size-dependent but remain constant in the first 3-unit-cell interfacial monolayers regardless of the nanodots' size. First principle calculations reveal a unique structural mechanism behind the size-dependent magnetic anisotropy.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
A. L. Clauser, K. Oware Sarfo, R. Giulian, C. Ophus, J. Ciston, L. Arnadottir, M. K. Santala
Summary: The atomic structure of platinum/gamma-alumina interfaces was studied using scanning transmission electron microscopy (STEM) and density functional theory (DFT) simulations. The models of gamma-alumina by Smrcok et al. and Zhou and Snyder were compared to the experimental data, and the Oware Sarfo model with oxygen termination was found to best fit the interface region. However, the fit was poorer beyond the third atomic layer in the gamma-alumina due to computational limitations in the model design. Understanding the accuracy and limits of these models is crucial for studying the structure-property relationships in this system.
Article
Food Science & Technology
Amal S. Albedwawi, Reem Al Sakkaf, Tareq M. Osaili, Ahmed Yusuf, Amin Olaimat, Shao-Quan Liu, Giovanni Palmisano, Nagendra P. Shah, Mutamed M. Ayyash
Summary: This paper investigated the ability of lactic acid bacteria (LAB) and Bifidobacterium to remove acrylamide (AA) and examined the mechanism(s) of the AA removal using various microscopic techniques. The results showed that Bifidobacterium breve and Lactiplantibacillus plantarum exhibited higher acrylamide reduction rates. The study also found that both strains could tolerate low pH levels and remove acrylamide under in vitro gastrointestinal conditions.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Yawei Li, Li Wang, Yufeng He, Wei Zheng, Langhong Lou, Jian Zhang
Summary: The study found that as the temperature increases, the spacing of dislocation networks in the gamma/gamma' interface decreases, while the minimum creep rate increases non-linearly. This is due to the enhanced dislocation-climb in the interface and gamma'-cutting by a <010> superdislocations.
SCRIPTA MATERIALIA
(2022)
Article
Multidisciplinary Sciences
Haifeng Yu, Huawei Zhu, Hongliang Jiang, Xiaozhi Su, Yanjie Hu, Hao Jiang, Chunzhong Li
Summary: A dual-track strategy of tantalum doping and cerium oxide coating is used to fully restrain the escape of lattice oxygen from Ni-rich cathodes in high-voltage regions, enhancing the performance and safety of lithium-ion batteries. The treated cathode exhibits high cyclic performance within the voltage range of 2.7-4.5 V.
NATIONAL SCIENCE REVIEW
(2023)
Article
Materials Science, Multidisciplinary
Jiahao Zhang, Qiucheng Xu, Jingyu Wang, Yanjie Hu, Hao Jiang, Chunzhong Li
Summary: Researchers have demonstrated a novel electrocatalyst that can improve the efficiency of water electrolysis by breaking the scaling relationship of the oxygen evolution reaction. This catalyst achieves ultrahigh current density at a low potential, with low overpotential and high stability under high current densities.
SCIENCE CHINA-MATERIALS
(2023)
Article
Engineering, Chemical
Hongbo Jin, Jiahao Zhang, Li Qin, Yanjie Hu, Hao Jiang, Chunzhong Li
Summary: In this study, a dual modification strategy of C-coating and Nb-doping was proposed and applied to improve LiFe0.5Mn0.5PO4 cathode materials. The C-coating layer formed a high-speed conductive network and provided protection to the electrolytes. The Nb-O coordination accelerated ion diffusion and electron transport, while suppressing the Jahn-Teller effect of Mn3+. The dual modifications resulted in LiFe0.5Mn0.5PO4 cathode materials with enhanced lithium-storage capacities and impressive cycling performance.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Jiechao Jiang, Zhengju Zhu, Ying He, Bismark Sarkodie, Wenyi Wang, Hao Jiang, Yanjie Hu, Chunzhong Li
Summary: Catalytic combustion is an important method to reduce toluene pollution, and improving the performance of catalysts is crucial. Oxygen vacancies play a key role in enhancing the catalytic combustion performance. By using flame spray pyrolysis (FSP), two different oxygen vacancy structures were synthesized and their effects on toluene catalytic combustion performance were evaluated. The closely contacted oxygen vacancies (cVo) exhibited enhanced oxygen activation capacity and significantly lower reaction temperatures compared to the separated oxygen vacancy (s-Vo) sample. The FSP synthesis strategy also provided excellent water resistance and high-temperature stability to the catalyst.
Article
Chemistry, Multidisciplinary
Baolu Wang, Li Lu, Yanjie Hu, Ling Chen, Hao Jiang
Summary: The electrochemical performance of layered Li-rich oxide Li1.20Mn0.54Ni0.13Co0.13O2 (LLO) can be improved by coating it with cerium oxide (LLO@CeO2), which can regulate the interfacial oxygen activity. The oxygen vacancies in cerium oxide can suppress irreversible oxygen release and prevent structure degradation. This finding offers a strategy to enhance the interfacial oxygen activity in Li-rich cathodes by coating them with metal oxides rich in oxygen vacancies.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Wu Wei, Zhihong Wang, Liyun Yao, Hao Jiang, Chunzhong Li
Summary: In this study, CeO2-x-coated LiNi0.9Co0.045Mn0.045Al0.01O2 was used to stabilize the lattice oxygen of Ni-rich and Co-poor cathodes, resulting in a reversible oxygen-storage protective layer and improved crystal and interface structure. The obtained cathode exhibited a high specific capacity of 223 mA h g(-1) at 0.1C and 140 mA h g(-1) even at 10C, with 96.7% capacity retention at 1C after 100 cycles in a coin-type half-cell. About 90.1% capacity retention could still be obtained at 1C after 300 cycles in a pouch-type full-cell. This work provides a viable method for stabilizing the lattice oxygen of Ni-rich and Co-poor cathodes.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Yang Zhang, Danjiao Zhao, Lei Cao, Lanlan Fan, Aiping Lin, Shufen Wang, Feng Gu, Aibing Yu
Summary: Flexible strain sensors are crucial for public healthcare as they can noninvasively monitor vital health signals. In this study, we developed structurally integrated 3D conductive networks-based flexible strain sensors using a droplet-based aerosol jet printing process and a transfer process. The sensors showed enhanced conduction and mechanical properties during stretching, and demonstrated effective responses to human movements such as finger bending and arm bending. Our findings highlight the potential of droplet-based aerosol jet printing for advanced flexible devices in optoelectronics and wearable electronics applications.
Article
Engineering, Manufacturing
Aiping Lin, Yang Zhang, Danjiao Zhao, Yu Wu, Shufen Wang, Jianmin Li, Lanlan Fan, Shixian Xiong, Lei Cao, Feng Gu
Summary: Flexible techniques for producing high-resolution and moderate efficiency luminescent patterns at the microscale have potential importance for various applications. An innovative droplet-based aerosol jet printing procedure has been developed for creating brightly luminescent patterns of europium-doped yttrium oxide (Y2O3:Eu3+) inorganic phosphors at a low calcining temperature. The procedure synchronized droplet deposition behavior and microreactions to effectively create microscale luminescent patterns. The printed patterns exhibited red emission similar to those calcined at 1000 degrees C, suggesting future applications in flat panel display systems.
ADDITIVE MANUFACTURING
(2023)
Article
Chemistry, Multidisciplinary
Yushuang Fang, Yu Fan, Kunchi Xie, Wangxin Ge, Yihua Zhu, Zhiwen Qi, Zhen Song, Hongliang Jiang, Chunzhong Li
Summary: Designing an efficient electrode-electrolyte interface for H2O2 electrosynthesis is challenging. However, adding dimethyl sulfoxide (DMSO) to the electrolyte can improve the selectivity and activity of H2O2 production. The formation of hydrogen bonds between DMSO and water at the electrode-electrolyte interface reduces water dissociation, leading to improved selectivity of H2O2 synthesis. This work highlights the importance of regulating the interfacial hydrogen-bond environment for enhancing electrochemical performance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Chemical
Jiachen Guo, Zhiyuan Peng, Hu Wang, Liu Yang, Ling Zhang, Chunzhong Li
Summary: In this study, urea-assisted ball milling method was used to enhance the thermal conductivity, flame resistance, and mechanical properties of cellulose nanofiber-based film by creating the covalent bond between boron nitride nanosheets (BNNS) and black phosphorus (BP). The treated film showed high thermal conductivity at 50% loading, with reduced fire hazard.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Editorial Material
Chemistry, Multidisciplinary
Shiyong Zhao, Hailong Wang, Andreas Ruediger, Feng Gu, Dongliang Yan, Jinlin Lu
FRONTIERS IN CHEMISTRY
(2023)
Review
Energy & Fuels
Yuhang Jiang, Yating Wang, Rongzhen Chen, Yuhang Li, Chunzhong Li
Summary: The use of bimetallic metal-organic frameworks (MOFs) as electrocatalysts for the carbon dioxide reduction reaction (CO2RR) has gained significant attention in the field of clean energy. Bimetallic MOFs exhibit synergistic effects and superior performance compared to monometallic MOFs, particularly in terms of product selectivity. This mini-review provides an overview of recent progress in the synthesis and design of bimetallic MOFs as CO2RR electrocatalysts. The importance of organic ligands, metal components, and MOF-derived materials is discussed, along with the advantages of utilizing two metal components. The challenges, gaps, and future perspectives of using bimetallic MOF materials for electrocatalytic CO2RR are also highlighted.
Article
Chemistry, Multidisciplinary
Zhihong Wang, Wu Wei, Tao Zhang, Haifeng Yu, Chunzhong Li, Ling Chen, Hao Jiang
Summary: In this study, perovskite oxides were used to enhance the cathodes of Ni-rich lithium-ion batteries. The results showed that the perovskite oxides significantly reduced lattice strain and prevented side reactions, leading to a cathode with high capacity and good cycling stability at high voltages.
Article
Chemistry, Multidisciplinary
Liyue Zhang, Qiucheng Xu, Yanjie Hu, Ling Chen, Hao Jiang
Summary: This study evaluates the pH-stability relationship of four typical metal oxides as anode catalysts in AEMWE and screens out suitable transition metal oxides as alternatives to noble metal catalysts for green hydrogen production.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Zhaolu Zhang, Kai Huang, Xinyue Qiu, Wangxin Ge, Xiaoling Yang, Yihua Zhu, Cheng Lian, Honglai Liu, Hongliang Jiang, Zhong Li
Summary: This work demonstrated a highly efficient electrochemical conversion of 5-hydroxymethylfurfural to 2,5-bis(hydroxymethyl)furan and developed a highly porous Cu-based catalyst with high BHMF selectivity and long-term stability. The electrochemically generated catalyst with abundant Cu/Cu2O interfaces was identified as the catalytically active phase for HMF conversion through structural characterizations.
FUNDAMENTAL RESEARCH
(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)
