Article
Chemistry, Physical
Pengju Han, Meihua Hu, Ying Tian, Shuaizhou Jiang, Shangsheng Li
Summary: In this study, Mn-doped CuSb1-xMnxSe2 samples were synthesized and their thermoelectric properties were characterized. The results showed that Mn doping significantly optimized the carrier concentration and mobility, enhancing the electrical transport performance. Additionally, the lattice thermal conductivity of the compounds decreased, resulting in a higher figure of merit ZT.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Materials Science, Multidisciplinary
S. Pailhes, V. M. Giordano, S. R. Turner, P. -F Lory, C. Candolfi, M. de Boissieu, H. Euchner
Summary: Exploiting the structural complexity of crystals at the scale of their unit cell is a well-established strategy in the search for efficient materials for energy conversion. The discovery of clathrates with exceptionally low lattice thermal conductivity but essentially unaffected and tunable electronic properties has revealed the potential of this strategy. The thermal conductivity of clathrates behaves similarly to glasses, but its origin is fundamentally different.
RESULTS IN PHYSICS
(2023)
Review
Chemistry, Multidisciplinary
Yan Sun, Yue Liu, Ruichuan Li, Yanshuai Li, Shizheng Bai
Summary: This paper reviews the design and research progress of thermoelectric materials around lifting ZT value in recent years, discussing the optimization of carrier concentration, improvement of carrier mobility, and the influence of lattice thermal conductivity on thermoelectric performance. The synergistic effect of different dimensions, scales, and crystal structures to reduce lattice thermal conductivity is also discussed, as well as the new application of electro-acoustic decoupling in thermoelectric materials, providing practical ideas for expanding the application and scale industrialization of thermoelectric devices.
FRONTIERS IN CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Yuan Fan, Zhuoxin Liu, Guangming Chen
Summary: Metal-organic frameworks (MOFs), with high porosity and tunable properties, have shown unique advantages and potential for thermoelectric applications. Their thermoelectric properties can be regulated by selecting and arranging metal centers and organic ligands, while also incorporating a large variety of guest molecules to improve energy conversion efficiency.
Article
Materials Science, Multidisciplinary
Yuping Wang, Lizhong Su, Haonan Shi, Xiang Gao, Tao Hong, Bingchao Qin, Li-Dong Zhao
Summary: With in-depth research on the thermoelectric properties of 2D and 3D materials, the study explores the relationship between thermoelectric transport and phase structures of 2D-3D heterostructures. Through experimental measurements and theoretical calculations, it is discovered that the reduction in lattice thermal conductivity is more significant in samples with small amounts of heterostructure phases. The presence of low symmetrical-PbSe and high symmetrical-SnSe phases in the heterostructures is experimentally confirmed at the microscopic scale. This study provides a perspective and investigation method to unravel the structural details and transport properties of 2D-3D heterostructure composites.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Physical
Shigeru Katsuyama, Kohei Kamoya
Summary: A sintered composite made of p-type Si0.99B0.01 and insulative SiO2 particles was studied for its thermoelectric properties. The electrical conductivity and thermal conductivity of the composite were found to change with the volume fraction of Si0.99B0.01, showing specific trends at different stages of volume fraction increase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Thermodynamics
Seyed Esmaeil Sadati, Nader Rahbar, Hadi Kargarsharifabad, Abdollah KhalesiDoost
Summary: The study introduces a new method for measuring thermal conductivity of low thermal conductivity materials using thermoelectric technology, with results showing high accuracy and repeatability. The measuring system has short and stable measuring time, with different linear correlation models proposed for different materials and measurement errors ranging from 0.5% to 10%.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
Hao Zhu, Chenchen Zhao, Pengfei Nan, Xiao-ming Jiang, Jiyin Zhao, Binghui Ge, Chong Xiao, Yi Xie
Summary: Understanding the intrinsic lattice thermal conductivity in (Bi-2)(m)(Bi2Te3)(n) compounds involves the interaction between heat-carrying acoustic phonons and low-frequency optical phonons, chemical bond softening, lattice anharmonicity, and small Brillouin zone volume contributing to low cutoff frequency of acoustic phonon modes. These mechanisms together result in intrinsically low lattice thermal conductivity, making the compounds potential candidates for future thermoelectric applications and guiding the design of materials with desired thermal transport properties.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Yaoning Bai, Taoyuan Ouyang, Xinru Li, Yuwei Yan, Zisong Kong, Xiaolong Ma, Zhi Li, Zhidong Li, Xiaoming Cai, Jinming Cai, Honglin Tan
Summary: The construction of nanocomposite structures can effectively reduce the thermal conductivity of thermoelectric materials, leading to improved thermoelectric properties. In this study, Bi2S3/rGO nanocomposite materials were prepared using hydrothermal synthesis techniques and tubular sintering techniques, showing significantly reduced thermal conductivity and enhanced performance compared to pure Bi2S3.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Wenwen Lin, Jiangang He, Xianli Su, Xiaomi Zhang, Yi Xia, Trevor P. Bailey, Constantinos C. Stoumpos, Ganjian Tan, Alexander J. E. Rettie, Duck Young Chung, Vinayak P. Dravid, Ctirad Uher, Chris Wolverton, Mercouri G. Kanatzidis
Summary: TlCuSe is an intrinsic p-type semiconductor with ultralow thermal conductivity and high power factor, resulting in a high figure of merit ZT. The weak chemical bonds and large atomic mass contribute to the low sound velocity and anharmonicity, which helps to suppress lattice thermal conductivity.
ADVANCED MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Abubakar Yakubu Haruna, Yubo Luo, Wang Li, Zheng Ma, Tian Xu, Qinghui Jiang, Junyou Yang
Summary: This research demonstrates that incorporating AgBiSe2 into n-type Bi2Te2.69Se0.33Cl0.03 can effectively regulate the electrical and thermal transport properties, leading to improved thermoelectric performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Wenkai Le, Wenwen Sheng, Runtao Liu, Minhui Yuan, Wenwei Yang, Jingyi Lv, Li Yin, Chen Chen, Xinyu Wang, Zongwei Zhang, Kejia Liu, Tianchi Wang, Qian Zhang, Jing Shuai
Summary: In this study, Eu0.5Ca0.5Zn2-xMgxSb2 compounds were prepared using ball milling and spark plasma sintering methods. The results show that the thermoelectric performance of Eu0.5Ca0.5Zn2Sb2 was significantly improved through the ball milling and hot-pressing preparation process, and Mg substitution further increased its thermoelectric performance by regulating the thermal conductivity. The obtained high thermoelectric performance in this work provides a reference for improving the properties of other CaAl2Si2 structure Zintl thermoelectric materials.
MATERIALS TODAY ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Yingcheng Zhao, Zejun Li, Yueqi Su, Changzheng Wu, Yi Xie
Summary: Lowering thermal conductivity via heterointerfaces is a common strategy for optimizing thermoelectric performance, but often results in decreased electrical conductivity. This study presents an ordered magnetic heterostructure superlattice synthesized by van der Waals confined epitaxial growth, which achieves a maximized filling amount to decrease thermal conductivity while maintaining carrier transport path.
Article
Materials Science, Multidisciplinary
Xianke Wu, Ziyu Wang, Renhui Jiang, Yuan Tian, Yong Liu, Jing Shi, Wenyu Zhao, Rui Xiong
Summary: In this study, Cu0.6Ni0.4 (CN) nanoparticles synthesized via hydrothermal method are introduced into commercial Bi0.4Sb1.6Te3 (BST) materials to suppress thermal conductivity and broaden the application temperature zone. The results show that the weighted mobility is improved and the bipolar thermal conductivity is suppressed for all samples. The thermoelectric performance can be enhanced and the optimal ZT values are achieved at higher temperatures with the presence of CN nanoparticles.
MATERIALS TODAY PHYSICS
(2022)
Article
Chemistry, Physical
Ping Zhang, Zhihao Lou, Lingyun Gong, Jie Xu, Qian Chen, Michael John Reece, Haixue Yan, Zinovi Dashevsky, Feng Gao
Summary: High-entropy oxides with complex compositions can lower the thermal conductivity of SrTiO3-based thermoelectric materials to optimize their properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Weicheng Zhong, Hsin Wang, Rebecca D. McAuliffe, Yong Yan, Stephanie Curlin, Tim Graening, Andrew T. Nelson
Summary: In this study, the thermal diffusivity and electrical resistivity of Zircaloy tubes were measured using the laser flash analysis and four-probe configuration methods, respectively. The results showed good agreement with the measurements of Zircaloy plates and previously published data. Further investigations revealed the significant effects of hydrogen on the thermal diffusivity and electrical resistivity of Zircaloy.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Shengnan Dai, Changdong Liu, Jinyan Ning, Chenguang Fu, Jinyang Xi, Jiong Yang, Wenqing Zhang
Summary: This study reveals the influence of electron-phonon interactions on the lattice thermal conductivity of thermoelectric materials at different temperatures and carrier concentrations. It is found that TiCoSb and ZrIrSb compounds show the largest reductions in thermal conductivity (32% and 20%) due to the electron-phonon interactions at a carrier concentration of 1021 cm-3 and 300 K. Strong electron-phonon coupling and increased electronic density of states at the Fermi level are beneficial for reducing the thermal conductivity.
MATERIALS TODAY PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Weishu Liu, Zhijia Han, Jialin Ji, Tao Feng, Jiong Yang, Wenqing Zhang
Summary: Thermoelectric materials are of great interest for their ability to convert thermal energy and electrical power. New materials and strategies are being explored to achieve high values of ZT, a key parameter for thermoelectric materials. This study shows that (ZT)max has a nearly linear relationship with B*, which combines mobility, thermal conductivity, and bandgap into a single parameter. The authors suggest that pursuing high values of U*, large bandgap, and low lattice thermal conductivity can lead to high B*, making it an effective screening parameter for new thermoelectric materials.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Yang Hua, Wei Bai, Shengnan Dai, Rongjie He, Pengfei Nan, Liang Sun, Jiong Yang, Bo Sun, Binghui Ge, Chong Xiao, Yi Xie
Summary: Currently, the focus has been on layered materials in the search for materials with high kappa anisotropy ratios. However, the limited quantity and lower workability of these materials compared to non-layered ones have led to exploration of non-layered materials instead. In this study, using PbSnS3 as an example, it was found that the maldistribution of chemical bond strength in non-layered materials can result in large anisotropy of kappa. The findings reveal an anisotropy ratio in PbSnS3 that is among the highest ever reported in non-layered materials, surpassing classical layered materials like Bi2Te3 and SnSe. These findings not only expand the exploration of high anisotropic kappa materials but also offer new possibilities for thermal management applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Physical
Xiangdong Wang, Ye Sheng, Jinyan Ning, Jinyang Xi, Lili Xi, Di Qiu, Jiong Yang, Xuezhi Ke
Summary: Thermoelectric materials have the potential to convert heat to electricity and vice versa, making them ideal for solid-state power generation and refrigeration. However, traditional methods of developing these materials are time-consuming and expensive. This paper reviews the recent progress in machine learning-based research on thermoelectric materials, including predicting and optimizing their properties and developing functional materials with targeted thermoelectric properties. The future research directions are also discussed.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Physics, Multidisciplinary
Yunxiu Li, Jinyan Ning, Jinyang Xi, Shenghao Wang, Jiong Yang
Summary: Fluctuations in operating temperatures can have a significant impact on the efficiency of solar cells due to changes in the electronic structures of absorption layer materials. We used the EPR method to study the temperature dependence of the band gap of FeS2 and found that the band gap reduction caused by vibrations is small and can be explained by the counteracting influences of different phonon modes. Our analysis also revealed that the shortening of the S-S bond length and the change in the Fe-S bond length are responsible for the increase and decrease in the band gap of FeS2, respectively.
Article
Materials Science, Multidisciplinary
Yu He, Xin Li, Jiong Yang, Weimin Li, Gang Li, Tingjun Wu, Wenjie Yu, Lei Zhu
Summary: Current-induced spin polarization or electric-field-controlled energy splitting has potential applications in spintronic devices such as spin-orbit torque devices and spin transistors. In this study, a high-throughput workflow using the three-point-spin-texture method was designed to screen for materials with large spin-split energy. A total of 440 Rashba, 411 Dresselhaus, and 469 Zeeman-type candidate materials were identified. The spin-split energies of KSnSb, TaSi2, and PtN2 were found to be 0.19 eV, 0.82 eV, and 0.55 eV, respectively. This work expands the materials database for spintronic devices and facilitates further experimental research.
RESULTS IN PHYSICS
(2023)
Article
Multidisciplinary Sciences
Qingxin Dong, Junsen Xiang, Zhen Wang, Yunxiu Li, Rui Lu, Te Zhang, Nan Chen, Yifei Huang, Yiyan Wang, Wenliang Zhu, Guodong Li, Huaizhou Zhao, Xinghua Zheng, Shuai Zhang, Zhian Ren, Jiong Yang, Genfu Chen, Peijie Sun
Summary: This research reports a compound, TlCu3Te2, with remarkably high thermoelectric performance due to its quasi-one-dimensional structure. The compound exhibits outstanding thermoelectric performance at 300K and 400K, which is attributed to large power factors and small lattice thermal conductivities. It represents the first bulk material with quasi-uniaxial thermoelectric transport and provides a new opportunity for high-performance thermoelectricity.
Article
Materials Science, Multidisciplinary
Mingjia Yao, Jialin Ji, Xin Li, Zhenyu Zhu, Jun-Yi Ge, David J. Singh, Jinyang Xi, Jiong Yang, Wenqing Zhang
Summary: Two-dimensional materials (2DMs) possess unique physical and chemical properties not found in other material classes. We employed high-throughput computational screening to identify high-mobility 2DM semiconductors. By evaluating properties such as band gap, magnetism, elasticity, and deformation potential, we predicted 19 2DMs with high mobilities at room temperature and good dynamic stability. These materials show promising potential for semiconductor electronic devices.
SCIENCE CHINA-MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Chenxin Wang, Zirui Dong, Jiajun Chen, Zhili Li, Lu Gan, Jiong Yang, Jiye Zhang, Jun Luo
Summary: TiFeSb can be stabilized by filling Ni to the vacant 4d site of the half-Heusler structure, leading to the formation of a single-phase TiFeNi0.1Sb alloy. By designing and synthesizing TiFe1.1-xNixSb (x = 0.1-1.0) samples with more valence electrons, improved thermoelectric properties were achieved. The p-type TiFe0.8Ni0.3Sb and n-type TiFe0.3Ni0.8Sb exhibited dimensionless thermoelectric figure of merits zT of about 0.6 and 0.4 at 973 K, respectively.
SCIENCE CHINA-MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jialin Ji, Zhehong Liu, Jianhong Dai, Di Qiu, Jiong Yang, Jinyang Xi, Youwen Long, Wenqing Zhang
Summary: Low-frequency cluster vibration, specifically the delocalized cluster vibration, significantly reduces the lattice thermal conductivity by interrupting acoustic vibrations. In this study, the delocalized cluster vibration was observed in the transition-metal oxide Bi3Ir3O11, leading to a much lower thermal conductivity value compared to other metallic materials. The discovery of this phenomenon contributes to a better understanding of lattice thermal transport and opens up possibilities for designing materials with improved thermal insulation properties.
MATERIALS TODAY PHYSICS
(2023)
Article
Physics, Multidisciplinary
Shen Han, Shengnan Dai, Jie Ma, Qingyong Ren, Chaoliang Hu, Ziheng Gao, Manh Duc Le, Denis Sheptyakov, Ping Miao, Shuki Torii, Takashi Kamiyama, Claudia Felser, Jiong Yang, Chenguang Fu, Tiejun Zhu
Summary: This study finds that aliovalent doping can be more effective in reducing the lattice thermal conductivity of thermoelectric semiconductors compared to isoelectronic alloying. The introduction of aliovalent dopants leads to the softening and deceleration of optical phonons, resulting in a significant reduction in thermal conductivity. Moreover, the heavy dopant can induce the avoided crossing of acoustic and optical phonon branches, further suppressing phonon propagation.
Article
Materials Science, Multidisciplinary
Pengbo Ding, Yifan Zhu, Zhijia Han, Long Li, Liang Zhang, Yuhang Cai, David J. Singh, Lenan Zhang, Wenqing Zhang, Sunmi Shin, Jiong Yang, Weishu Liu, Liang Guo
Summary: In this study, ultrafast spectroscopy of coherent acoustic phonons was used to characterize the ADP of thermoelectric materials, specifically Mg3Sb2. The method relies on the transient Coulombic interaction between carriers and acoustic phonons, and is free from other scattering channels. It is particularly feasible for studying thermoelectric materials due to their strong phonon anharmonicity and small band gaps, ensuring measurement accuracy.
Article
Materials Science, Multidisciplinary
Yifan Zhu, Erting Dong, Hongliang Yang, Lili Xi, Jiong Yang, Wenqing Zhang
Summary: This work investigates the application of the Green-Kubo method based on machine-learning interatomic potentials and equilibrium molecular dynamics (GK-MLIP-EMD) in thermal transport simulations of solids. Using β-Cu2-xSe (0 x 0.05) as an example, it is found that the GK-MLIP-EMD approach fails to evaluate the lattice thermal conductivities (κLs) for β-Cu1.95Se, while a direct method based on nonequilibrium molecular dynamics reliably predicts these values. The failure of GK-MLIP-EMD for β-Cu1.95Se is attributed to the ambiguous projection of the local atomic potential energy Ui in MLIPs.
Article
Chemistry, Physical
Pu Miao, Cheng Yang, Shen Han, Shengnan Dai, Airan Li, Lili Xi, Jiong Yang, Tiejun Zhu, Chenguang Fu
Summary: The electrical and thermal transport properties of LuNiSb-based compounds were simultaneously improved by aliovalent doping of Sn and Co, resulting in a significant suppression of lattice thermal conductivity. Compared with Co-doped compounds, Sn-doped ones showed better electrical performance, likely due to a weaker perturbation of the valence band. This work highlights the simultaneous optimization of electrical and thermal transport properties through aliovalent doping, paving the way for the development of high-performance thermoelectric materials.
JOURNAL OF MATERIALS CHEMISTRY A
(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)
