Article
Chemistry, Physical
Chao Zhou, Jiajing Li, Xiaoxiao Zhang, Tiantian Yu, Yin Zhang, Sen Yang
Summary: Piezoelectric materials, especially Pb-based ones, are widely used in various applications. However, due to the toxicity of Pb, there is a need for low-Pb or Pb-free alternatives. This study presents the design and fabrication of a low-Pb piezoelectric ceramic system, with systematic investigation of its properties. The results show that the intermediate composition exhibits the best performance among all the samples.
Article
Materials Science, Ceramics
Xing-Hua Ma, Junjia Xia, Zhenlu Zhang
Summary: By adjusting the amount of Sb5+ ions doped, the crystal structure of 0.965(Na0.5K0.5)(Nb1-xSbx)-0.035BaZrO(3) ceramics was changed, leading to variations in their piezoelectric properties.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2021)
Article
Chemistry, Inorganic & Nuclear
Przemyslaw Szklarz, Anna Gagor, Ryszard Jakubas, Wojciech Medycki, Grazyna Bator
Summary: We synthesized and characterized two new lead-free organic-inorganic hybrid crystals: (S(CH3)(3))(3)[Bi2I9] (TBI) and (S(CH3)(3))(3)[Sb2I9] (TSI). Thermal analysis showed that both compounds undergo structural phase transitions. TBI undergoes two phase transitions at 314.2/314.8 K (cooling/heating) and at 181.5 K (I. II and II. III).
DALTON TRANSACTIONS
(2023)
Article
Materials Science, Ceramics
Tao Pu, Hao Chen, Jie Xing, Yaxia Luo, Shibo Fan, Hong Liu, Qiang Chen, Jianguo Zhu
Summary: This study investigated the effect of Nd-doping on the morphotropic phase boundary and successfully synthesized low-cost Nd-doped PZT piezoceramics with high piezoelectric performance and a broad temperature range.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Physics, Applied
Anton Tuluk, Sybrand van der Zwaag
Summary: This study investigates the effect of quenching and annealing on a new ternary piezoelectric ceramic, and finds that an optimal heat treatment can yield a quasi-stable piezoelectric constant value. The study also reveals unusual defect behavior in this novel system. The quenching and annealing process is reversible and can be combined with additional chemical modifications to tailor the material's properties.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Metallurgy & Metallurgical Engineering
Feng Chao, Feng Yun-yun, Fan Meng-jia, Geng Chao-hui, Lin Xiu-juan, Yang Chang-hong, Huang Shi-feng
Summary: This research focused on high-temperature acoustic emission sensor using piezoelectric ceramic. A series of BScxFe1-x-PT-BT ceramics with high Curie temperature and large piezoelectric constant were presented. The sensors based on these ceramics showed good temperature stability and high signal-to-noise ratio, making them suitable for structural health monitoring in high-temperature fields.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Engineering, Electrical & Electronic
K. Iben Nassar, M. Slimi, N. Rammeh, S. Soreto Teixeira, M. P. F. Graca
Summary: In this paper, impedance spectroscopy, modulus analysis, AC electrical conductivity, and dielectric properties of the double perovskite compound SrAgNiMnO6 have been studied. The material exhibits semiconductor characteristics and shows relaxation phenomena in its dielectric properties. These findings suggest that this compound has important electrical and dielectric properties for potential technological applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
Zhihao Dong, Peiyao Zhao, Zhenyong Cen, Xiaohui Wang
Summary: In the study of Ni-internal-electrode KNN-based MLAs, a tape casting method was used to fabricate MLAs with different layer numbers and thicknesses, which were then sintered in a reducing atmosphere. The MLAs showed reduced driving voltages and increased displacement outputs compared to bulk ceramics, making them more suitable for miniaturization and portability scenarios. However, the piezoelectric properties of the KNN-based materials were still suppressed, indicating a need for further attention to the design of electrode structure and the development of internal electrode paste for MLAs.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Xinjian Wang, Yu Huan, Yixuan Zhu, Peng Zhang, Wenlong Yang, Peng Li, Tao Wei, Longtu Li, Xiaohui Wang
Summary: In this study, the intrinsic conduction mechanism and optimal sintering atmosphere of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O-3 (BCZT) ceramics were regulated by Mn-doping element. The undoped ceramics exhibited best electrical properties in O-2, while the Mn-doped ceramics sintered in N2 showed the highest insulation resistance and best piezoelectric properties.
JOURNAL OF ADVANCED CERAMICS
(2022)
Article
Chemistry, Physical
A. V. Kalgin, I. Y. Kobyakov
Summary: The study reveals the relationship between the magnetoelectric coupling coefficient and DC magnetic field strength, volume fraction, and temperature in two-layer ceramic composites. An inverse correlation is found between internal friction and the magnetoelectric coupling coefficient, attributed to the interaction of ferroelectric domain boundaries and crystal-lattice defects.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Zhemin Gong, Lingjun Shu, Jingxuan Yin, Chengwei Gao, Yongxing Liu, Xiaolong Zhou, Xiang Shen, Shixun Dai, Changgui Lin, Qing Jiao
Summary: In this study, we report the preparation and performance characteristics of a double-doped sulfide superionic conductor Na3.02Si0.1Sb0.9S3.92Br0.08. The dual-doping effect of SiS2 and NaBr significantly improves the ionic conductivity and stability of the solid electrolyte.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Kazuki Uchida, Takahiro Ohkubo, Futoshi Utsuno, Koji Yazawa
Summary: Li7P3S11 glass ceramics with modified composition were prepared via two-step mechanical milling and thermal annealing, showing enhanced conductivity after ball-milling and thermal annealing. Analysis using P-31 solid-state nuclear magnetic resonance spectroscopy revealed the existence of an additional PS43- unit in the Li7P3S11 phase.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Inorganic & Nuclear
Zhenyong Cen, Ze Xu, Longtu Li, Xiaohui Wang
Summary: The addition of ZrO2 dopant significantly improves the performance of KNN-based ceramics, including increasing the quantity of ferroelectric phases, enhancing anti-reduction properties, raising the activation energy of grain boundaries, and improving fatigue resistance of piezoelectric strain.
DALTON TRANSACTIONS
(2021)
Article
Physics, Applied
Xingchen He, Yuanhao Lu, Tao Chu, Wenyong Liao, Tao Li, Xiaoli Liu, Lianyao Liang, Huayong Li, Xingyu Dai, Ying Liu, Liujiang Zhou
Summary: In this study, a series of piezoelectric ceramics with the formula Pb0.93Sr0.06Ba0.01(Mg1/3Nb2/3)(0.035)(Ni1/3Nb2/3)(0.2)(Sb1/2Nb1/2)(0.015)(ZrxTi1-x)(0.75)O-3 + 0.5 wt. % Li2CO3, where x = 0.51, 0.50, 0.49, 0.48, 0.47, and 0.46, were successfully prepared using the one-step solid-state method. The results showed that the crystalline structure gradually transformed from rhombohedral to tetragonal phase with decreasing Zr content. Moreover, the piezoelectric ceramics with x = 0.49 exhibited outstanding electrical properties near the morphotropic phase boundary, indicating great potential for transducer applications.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Multidisciplinary Sciences
Rasha M. Abd El-Wahab, Shaimaa M. Fadel, Amal M. Abdel-karim, Sherif M. Eloui, Mohammad L. Hassan
Summary: In this study, rice straw nanofibers (RSNF) with a width of 4-5 nm were isolated and combined with zinc oxide nanoparticles (ZnONPs) to prepare flexible nanopaper films. The addition of ZnONPs slightly improved the tensile strength and Young's modulus of the RSNF nanopaper. Scanning electron microscopy (SEM) showed that ZnONPs were integrated into the RSNF. The electrical conductivity and dielectric properties of the prepared nanopaper were investigated, and it demonstrated potential for use in electronic components.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Ceramics
Fan Yang, Qiang Li, Ao Zhang, Yuxin Jia, Weijia Wang, Huiqing Fan
Summary: Ferroelectric ceramics with good piezoelectric and ferroelectric properties can be used for energy storage equipment and actuators. This study focused on the doping of (Al0.5Nb0.5)(4+) (AN) complex ions into 0.7Bi(0.5)Na(0.5)TiO(3)-0.3Ba(0.3)Sr(0.7)TiO(3) (BNBST) ceramics, which resulted in the destruction of long-range ordered ferroelectric domains and the generation of polar nano regions. The doping of AN reduced strain hysteresis and improved energy storage temperature stability and cycling performance.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Yuxin Jia, Huiqing Fan, Ao Zhang, Han Wang, Lin Lei, Qifeng Quan, Guangzhi Dong, Weijia Wang, Qiang Li
Summary: This study develops an extraordinary strategy to obtain giant electrostrain by manipulating defect dipoles in (Bi, Na) TiO3-BaTiO3-based lead-free relaxor ferroelectric (RFE) ceramics, achieving a high electro-induced strain value of 1.68% with a corresponding effective piezoelectric coefficient (d(33)*) of 1965 pm/V. The effect of defect dipoles on RFE ceramics is also discussed. This work proposes a detailed mechanism considering defect dipoles coupling in RFE ceramics and provides a promising paradigm for achieving high electrostrain, which could be applied in designing a wide range of functional ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Yanyan Shang, Huiqing Fan, Yanqin Chen, Wenqiang Dong, Weijia Wang
Summary: In this study, an Ag-modified g-C3N4/CdS photocatalyst with a distinctive charge transfer channel was prepared, leading to an enhanced H2 production performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Xian Cheng, Zhiyong Liu, Qinfang Jing, Pu Mao, Kun Guo, Jinshan Lu, Bing Xie, Huiqing Fan
Summary: Piezoelectricity is a highly functional property that has been widely studied in various applications, including piezoelectric catalysis and mechanical energy harvesting. In this work, (K0.5Na0.5)(0.94)Li0.06NbO3 (KNN6L) piezoelectric powders were combined with polydimethylsiloxane (PDMS) to develop flexible and recyclable KNN6L-PDMS porous piezoelectric composites. These composites demonstrated a degradation rate of approximately 91% for Rhodamine B dye wastewater under mechanical vibration, and the piezocatalytic activity remained excellent even after multiple decomposition cycles. Furthermore, COMSOL simulations confirmed the relationship between piezoelectric potential and piezocatalysis. The content of piezoelectric powders positively affected the magnitude of the generated piezoelectric potential. The catalytic mechanism was attributed to the generation of reactive oxygen species, such as center dot O-2(-) and center dot OH, in a water environment due to the strong piezoelectric effect of the porous composites. The flexible and recyclable porous piezoelectric composites exhibited outstanding performance in piezoelectric catalysis, which holds great promise for environmental remediation applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Environmental Sciences
Li Lv, Hong-Dan Yang, Qi-Wen Chen, Huiqing Fan, Jian-Ping Zhou
Summary: Two-dimensional La2Ti2O7 nanosheets with regular morphology and good dispersion were synthesized by a hydrothermal method under a magnetic field. Zero-dimensional Pt quantum dots were successfully loaded on the La2Ti2O7 nanosheets, which significantly enhanced the electron-hole separation and carrier transfer. The Pt-loaded La2Ti2O7 nanosheets exhibited a high photocatalytic ability for NO removal, with an efficiency of 51% for NO removal and low levels of NO2 intermediate pollutant.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Yanyan Shang, Huiqing Fan, Xiuzi Che, Weijia Wang
Summary: This paper presents an efficient strategy for exposing unsaturated edge Ag on the surface of photocatalysts, forming Ag@g-C3N4 heterojunction. The introduction of Ag nanospheres into g-C3N4 enlarges the distance between g-C3N4 nanolayers and increases the exposure of Ag nanospheres. The Ag@g-C3N4 heterojunction provides polyunsaturated edge Ag as active sites and forms unique charge transfer channels, resulting in prolonged lifetime of photogenerated electrons.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Julia Gelfond, Taotao Meng, Shuke Li, Tangyuan Li, Liangbing Hu
Summary: Carbon fiber derived from biomass, specifically bamboo cellulose, exhibits high electrical conductivity and can permanently sequester carbon from the atmosphere. The fabrication process involves extracting bamboo cellulose macrofibers, followed by stabilization and carbonization to create conductive carbon fibers.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Kang Yan, Yongbo Fan, Fulong Hu, Gang Li, Xueya Yang, Xinyu Wang, Xiaomin Li, Chao Peng, Weijia Wang, Huiqing Fan, Longtao Ma
Summary: Solid polymer electrolyte-based batteries are promising due to their safety, wide voltage window, and flexibility. However, their low ionic conductivity and mechanical strength, as well as weak resistance to oxidation/reduction, limit their use in Zn ion batteries. In this study, a polymer-in-salt Zn2+-conductive solid electrolyte was developed using a simple phase transition method. It exhibited high ionic conductivity, transfer number, and stable voltage window, leading to improved performance and cyclic stability in Zn ion batteries.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Li Lv, Lin Lei, Qi-Wen Chen, Cheng-Li Yin, Huiqing Fan, Jian-Ping Zhou
Summary: Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 are widely used in photocatalysis due to their layered crystal structure. The electronic structures of these phases play a crucial role in their photocatalytic activity. Heat treatment in a nitrogen atmosphere introduces more oxygen vacancies into the S-scheme heterojunction, leading to enhanced NO removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yanyan Shang, Huiqing Fan, Lin Lei, Weijia Wang
Summary: Two-dimensional materials have attracted great interest due to their large specific surface area and adjustable surface behaviors, showing potentials for enhancing energy conversion activity and optimizing properties. Defect engineering on 2D materials has been widely studied to regulate the physicochemical properties of photocatalysts for water splitting reactions. This study prepared AgBr/g-C3N4 catalyst and discovered a unique charge transfer pathway. The findings provide insights into heterostructure construction and property optimization.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Multidisciplinary Sciences
Attila Kormanyos, Qi Dong, Bin Xiao, Tangyuan Li, Alan Savan, Ken Jenewein, Tatiana Priamushko, Andreas Koerner, Thomas Boehm, Andreas Hutzler, Liangbing Hu, Alfred Ludwig, Serhiy Cherevko
Summary: This study investigates the dissolution of different electrocatalysts in acidic and alkaline media, and finds that certain metals in high-entropy alloys have lower dissolution under alkaline conditions.
Article
Nanoscience & Nanotechnology
Jiangwei Ma, Haichao Zhai, Ziwei Zhang, Maoyun Di, Zhigang Sun, Kewei Zhang, Jifan Hu, Huiqing Fan
Summary: In this study, composites of alkalized V2CTx MXene and NH2-graphene were prepared and used for ammonia sensing. The gas response of the composites was much stronger than that of alkalized V2CTx MXene alone, exhibiting excellent selectivity, moderate response/recovery time, and good durability and stability.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Lin Lei, Huiqing Fan, Yuxin Jia, Weijia Wang
Summary: A post-thermal treatment technique assisted with wood pyrolysis was employed to fabricate graphitic carbon nitride (g-C3N4) catalysts with thin-layered, porous, and defect-rich structures for photocatalytic hydrogen evolution. The use of a nickel foam as a substrate and pine wood on top of bulk g-C3N4 prevented structural damage and impurities during the synthesis process. The resulting g-C3N4 with tunable carbon vacancies and small particle sizes exhibited significantly improved photocatalytic performance.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Zhennan Wang, Dingze Lu, Jiucun Pan, Kiran Kumar Kondamareddy, Wenju Gu, Jing Li, Boyu Zhang, Junfang Wu, Huiqing Fan, Wingkei Ho
Summary: A ternary heterostructure of C3N4/MoS2/Zn0.5Cd0.5S was synthesized with highly efficient photocatalytic dehydrogenation and synergistic selective oxidation of benzyl alcohol to benzaldehyde. The introduction of MoS2 nanoflowers and g-C3N4 nanosheets improved the performance by accelerating charge transport and inhibiting photocorrosion. This research provides a potential technique for the dehydrogenation and selective oxidation of benzyl alcohol based on photocatalysis.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Yuhao Zhang, Dingze Lu, Zhennan Wang, Min Zhou, Kiran Kumar Kondamareddy, Jing Li, Huiqing Fan, Dezhong Cao, Wingkei Ho
Summary: Surface-abundant active sites, rapid charge transport, and prolonged electron lifetime are essential for efficient photocatalysis. This study successfully prepared Zn₀.₅Cd₀.₅S solid solutions with twin structure and S vacancies, demonstrating the superior performance of the optimized T-ZCSv catalyst in photocatalytic hydrogen production.
INORGANIC CHEMISTRY FRONTIERS
(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)
