Article
Multidisciplinary Sciences
Liqing Xu, Yu Xiao, Sining Wang, Bo Cui, Di Wu, Xiangdong Ding, Li-Dong Zhao
Summary: The authors achieved high thermoelectric performance in low-medium temperature PbSe through the introduction of dense dislocations. The dislocation density reached a high level and two types of dislocations were observed in n-type PbSe-based thermoelectric material. These dislocations effectively reduced the lattice thermal conductivity while maintaining high carrier transport.
NATURE COMMUNICATIONS
(2022)
Review
Engineering, Environmental
Jinchang Sun, Yu Zhang, Yuting Fan, Xinfeng Tang, Gangjian Tan
Summary: This review article summarizes recent research progress on PbSe-based thermoelectric materials. It provides a general introduction to the properties of IV-VI semiconductors, discusses the crystal and electronic band structures of PbSe, and explores how dopants regulate its carrier concentrations. The article also elaborates on the impact of electronic band structure engineering and microstructural architecturing on charge and phonon transport properties of PbSe. It concludes by discussing future directions for improving the thermoelectric properties of PbSe and promoting its applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Shuang Li, Xunuo Lou, Bo Zou, Yunxiang Hou, Jian Zhang, Di Li, Jun Fang, Tao Feng, Dewei Zhang, Yousong Liu, Jizi Liu, Guodong Tang
Summary: In this study, a p-type polycrystalline SnSe integrated with PbSe quantum dots was fabricated using an in situ magnetic field-assisted hydrothermal route, resulting in significantly enhanced Seebeck coefficients and power factor. The introduction of PbSe quantum dots functional units and manipulation of lattice strain provide a new perspective for designing high performance thermoelectric devices, leading to a high ZT value.
MATERIALS TODAY PHYSICS
(2021)
Article
Physics, Condensed Matter
Z. P. Yin, C. Y. Sheng, R. Hu, S. H. Han, D. D. Fan, G. H. Cao, H. J. Liu
Summary: It is found that there is strong coupling between Pb-Pb layers in two-dimensional chalcogenides, which can be fine-tuned to reduce phonon thermal conductivity significantly while slightly changing electronic transport, resulting in a maximum ZT value of 2.5 at 900 K for the p-type system. This work also presents an effective design strategy to enhance the thermoelectric performance of similar layered structures.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Multidisciplinary Sciences
Yingcai Zhu, Dongyang Wang, Tao Hong, Lei Hu, Toshiaki Ina, Shaoping Zhan, Bingchao Qin, Haonan Shi, Lizhong Su, Xiang Gao, Li-Dong Zhao
Summary: Thermoelectric generators convert waste heat to electricity, but their efficiency is a major obstacle. By incorporating AgInSe2, we have achieved multiple valence bands and strong phonon scattering in p-type PbSe, leading to improved thermoelectric performance.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Ning-Ning Zhou, Ze-Qing Hu, Ramzi Nasser, Ji-Ming Song
Summary: High thermoelectric performance and low material cost are crucial for the commercialization of thermoelectric modules. In this study, a nanocomposite of PbSe-Ag was successfully produced using a bottom-up approach, which exhibited positive Seebeck coefficient and enhanced electrical conductivity, while reducing total lattice thermal conductivity. This approach could provide a potential strategy to improve the thermoelectric performance of PbSe, promoting its commercialization.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Mingjing Chen, Xuyang Chen, Lide Fang, Guoying Yan, Xingkun Ning, Xingyuan San, Shufang Wang
Summary: This paper reports the light-induced transverse thermoelectric (TTE) effect in inclined PbSe thin films under ultraviolet pulsed light irradiation. The results show that this effect has large open-circuit voltage signals and ultrafast response, with high voltage sensitivity and excellent performance parameters.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Anqi Zhao, Yan Gu, Yudong Lang, Lin Pan, Yifeng Wang
Summary: The thermoelectric properties of PbSe-x %FeSe2 (x = 0, 0.25, 0.5, 0.75, 1, 3, 5) alloys were investigated in this study. The results showed that FeSe2 can dissolve into the PbSe lattice, introducing extra holes and reducing the electrical conductivity. The Seebeck coefficient was greatly improved by reducing the electron content. Additionally, the thermal conductivity of PbSe-0.5 %FeSe2 was successfully suppressed due to decreased electron thermal conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Yu Xiao, Liqing Xu, Tao Hong, Haonan Shi, Sining Wang, Xiang Gao, Xiangdong Ding, Jun Sun, Li-Dong Zhao
Summary: A high average ZT value has been achieved in an n-type PbSe-based thermoelectric material with ultrahigh carrier mobility, optimized carrier effective mass, carrier density, and microstructure. Through synergistic tuning of these factors, the carrier mobility and power factor were significantly enhanced, surpassing previous n-type PbSe-based materials.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Bangzhi Ge, Hyungseok Lee, Lulu Huang, Chongjian Zhou, Zhilei Wei, Bowen Cai, Sung-Pyo Cho, Jing-Feng Li, Guanjun Qiao, Xiaoying Qin, Zhongqi Shi, In Chung
Summary: By utilizing a unique alloy composition, synthesis process, and control of defect structures, the thermoelectric performance of n-type PbSe materials has been significantly improved, achieving high ZT(ave) and PFave. This research demonstrates successful enhancement of thermoelectric materials by nonstoichiometric composition, alloying, and controlled defect structures.
Article
Chemistry, Physical
Chhatrasal Gayner, Raghunandan Sharma, Iram Malik, Mukesh Kumar, Sugandha Singh, Kiran Kumar, Jitendra Tahalyani, Tulika Srivastava, Kamal K. Kar, Hiroyuki Yokoi, Amit K. Naskar
Summary: A significant improvement in the thermoelectric performance of PbSe, a scalable and easy-to-manufacture material, has been achieved by incorporating reduced graphene oxide nanoplatelets. The nanocomposites exhibit high Seebeck coefficient and low thermal conductivity, making them ideal for thermoelectric applications. This study provides a methodology for the scalable manufacturing of high-performance thermoelectric materials.
Article
Chemistry, Physical
Jinchang Sun, Ruoyu Wang, Wenjun Cui, Sen Xie, Tingting Luo, Hui Bai, Xiaodie Zhao, Zhiquan Chen, Xiahan Sang, Xiaojian Tan, Xinfeng Tang, Gangjian Tan
Summary: Dilute Sn doping can induce rich defect structure in PbSe, leading to enhanced thermoelectric performance.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Y. Rodriguez-Lazcano, Enue Barrios-Salgado, Juan Pablo Perez-Orozco, J. Campos, P. Altuzar, Eliseo Llamas Regla, David Quesada-Saliba
Summary: Lead selenide (PbSe) thin films were successfully synthesized using the MA-CBD technique, with analysis showing potential for applications in photovoltaic and thermoelectric fields. The films exhibited homogeneous quality, desired thickness, and promising electrical properties.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Biochemistry & Molecular Biology
Xinru Ma, Xuxia Shai, Yu Ding, Jie Zheng, Jinsong Wang, Jiale Sun, Xiaorui Li, Weitao Chen, Tingting Wei, Weina Ren, Lei Gao, Shukang Deng, Chunhua Zeng
Summary: Researchers synthesized a series of PbSe(NaCl)(x) samples and improved their electrical transport properties by manipulating the carrier concentration through adjusting the content of NaCl. A high thermoelectric figure of merit of 1.26 at 690 K was achieved in PbSe(NaCl)(4.5), suggesting potential applications in thermoelectric conversion.
Article
Nanoscience & Nanotechnology
Yiteng Tang, Shreedhar R. Kandel, Zhoufeng Jiang, Paul J. Roland, Randy Ellingson, Liangfeng Sun
Summary: Acetic acid induces branching in PbSe nanorods synthesis, but removing it results in uniform branchless nanorods. Tuning the reaction temperature allows for control of nanorod diameter and energy gap, leading to excellent optical properties for potential use in thermoelectric and optoelectronic devices.
ACS APPLIED NANO MATERIALS
(2021)
Article
Physics, Multidisciplinary
Guang-Tong Zhou, Yu-Hu Mu, Yuan-Wen Song, Zhuang-Fei Zhang, Yue-Wen Zhang, Wei-Xia Shen, Qian-Qian Wang, Biao Wan, Chao Fang, Liang-Chao Chen, Ya-Dong Li, Xiao-Peng Jia
Summary: The study found that the addition of Ti atoms is crucial for controlling the number of boron and oxygen atoms in the crystal, effectively affecting the growth process of diamonds. In addition, the introduction of Ti atoms also leads to the formation of boron-oxygen complexes and surface oxygen-related impurities.
Article
Chemistry, Inorganic & Nuclear
Xin Fan, Shan Gao, Qi Chen, Dayi Zhou, Lijie Chang, Yao Wang, Yuewen Zhang, Le Deng, Hongan Ma, Xiaopeng Jia
Summary: Skutterudites filled with electro-negative elements have attracted researchers' attention recently. By doping electron donors, stable compounds can be formed in the intrinsic pores, expanding the research scope. In this study, a skutterudite was synthesized and its properties were characterized. The introduction of electro-negative elements inhibited grain growth and optimized the thermoelectric properties.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Shoulong Lai, Weixia Shen, Zhuangfei Zhang, Chao Fang, Yuewen Zhang, Liangchao Chen, Qianqian Wang, Biao Wan, Xiaopeng Jia
Summary: This study successfully prepared industrial-grade diamonds containing different concentrations of SiV- color centers by adjusting the doping amount and pressure conditions. The results showed that increasing the Si doping amount enhanced the intensity of SiV- color centers in the diamond, while nitrogen impurities inhibited their formation.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Materials Science, Ceramics
Xin Fan, Dayi Zhou, Yaqi Chen, Xinjian Li, Shan Gao, Wenting Ji, Yuewen Zhang, Qi Chen, Hongan Ma, Xiaopeng Jia
Summary: In this study, a series of S-filled Ni-substituted skutterudite compounds were synthesized by a high-pressure and high-temperature method, and their phase composition, microscopic morphology, and electrothermal transmission properties were systematically characterized. The introduction of S atoms into the intrinsic pores of skutterudite improved the solid solution limit of Ni atoms and inhibited the growth of grains. The synthesized S0.05Co3.6Ni0.4Sb12 sample had a maximum room temperature power factor of 7.98 x 10(-4) Wm(-1)K(-2) and good stability after multiple thermal cycles.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Yuanwen Song, Chao Fang, Yuhu Mu, Yadong Li, Weixia Shen, Zhuangfei Zhang, Yuewen Zhang, Qianqian Wang, Biao Wan, Liangchao Chen, Xiaopeng Jia
Summary: Large single crystals of diamond were synthesized under high pressure and high temperature. The diamond morphology, nitrogen content, and Co-related optical centres were investigated. The results showed that the diamonds were bicrystalline or polycrystalline with an octahedral morphology and primarily {111} faces. The photoluminescence spectra revealed the presence of different Co-related optical centres, and the formation of Co-N complexes depended on the annealing temperature.
Article
Materials Science, Ceramics
Shoulong Lai, Jinhao Zang, Weixia Shen, Guofeng Huang, Chao Fang, Yuewen Zhang, Liangchao Chen, Qianqian Wang, Biao Wan, Xiaopeng Jia, Zhuangfei Zhang
Summary: The B4C-diamond composite with high hardness and toughness was prepared through high-pressure sintering of B4C and diamond powders. The diamond fraction had a significant effect on the densification, microstructure, and mechanical properties of the composite. The addition of 40 vol% diamond resulted in excellent comprehensive mechanical properties, including high relative density, density, Vickers hardness, and fracture toughness. The use of superhard diamond improved the fracture toughness of lightweight B4C while maintaining its high hardness.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Physics, Applied
Yinghao Zhu, Biao Wan, Weixia Shen, Zhuangfei Zhang, Chao Fang, Qianqian Wang, Liangchao Chen, Yuewen Zhang, Xiaopeng Jia
Summary: Through chemical doping and high-pressure synthesis, MoSe2 bulk materials with a controllable 2H/3R phase ratio have been successfully achieved. By doping with Nb element, the sample changed from n-type conduction to p-type conduction. The electrical properties were significantly improved by reducing the bandgap and enhancing the carrier concentration and mobility. The lattice thermal conductivity was reduced by point defects and grain/phase boundaries generated from Nb doping. A maximum zT value of 0.17 at 873 K was obtained, which is among the highest values for Te-free Mo dichalcogenides. The strategy of chemical doping and high-pressure synthesis provides an alternative route to achieve MoSe2 bulk materials with a controllable 2H/3R phase ratio for potential applications, which can be extended to other TMDs.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Lamei Zhao, Xinran Zhang, Biao Wan, Zhuangfei Zhang, Weixia Shen, Yuewen Zhang, Chao Fang, Liangchao Chen, Qianqian Wang, Julong He, Xiaopeng Jia
Summary: In this study, a new high-pressure phase of GeTe, called Cmca phase, was predicted using first-principles calculations. It is found to be the most energetically favorable phase in the pressure range of approximately 30 to 38.5 GPa. The Cmca phase exhibits strong metallic properties and superconductivity at 35 GPa and below.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Lisha Xue, Yuan Wang, Shuangmei Zhu, Qianhui Mao, Xiaopeng Jia, Yuewen Zhang
Summary: We synthesized the quaternary copper selenide BixCu2-3xSe0.95Te0.05 compounds by high-pressure followed with ball milling method and investigated their thermoelectric properties. The crystal structure and element doping were characterized and verified by X-ray diffraction, high-resolution transmission electron microscope and X-ray photoelectron spectroscopy. Samples with x = 0.001 and 0.002 exhibited larger layered grain size and smaller grain boundary compared to other samples, which resulted in reduced resistivity and optimized electronic characteristics in a wide temperature range. Surprisingly, dislocation-induced lattice strain fluctuations caused abrupt thermal conductivity, contrary to previous results. Ultimately, a peak value of zT = 1.03 at 873 K was achieved for Bi0.001Cu1.997Se0.95Te0.05 and Bi0.002Cu1.994Se0.95Te0.05.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Wenting Ji, Haidong Yu, Dayi Zhou, Xinjian Li, Xin Fan, Yuewen Zhang, Hongan Ma, Xiaopeng Jia
Summary: In this study, Bi2S3-based materials were prepared through a combination of mechanical alloying, high-pressure and high-temperature treatment, and spark plasma sintering. Cation and anion doping were employed to enhance the thermoelectric properties. Chlorine doping improved the electrical transport properties but increased thermal conductivity, while copper doping achieved a moderate improvement in electrical properties and reduced thermal conductivity. Collaborative optimization of electrical and thermal properties resulted in a maximum zT value of 0.45 for the Bi2S3-0.25 mol% Cu sample at 573 K.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Xinjian Li, Haidong Yu, Shan Gao, Xin Fan, Dayi Zhou, Wenting Ji, Yaqi Chen, Yuewen Zhang, Hongan Ma, Xiaopeng Jia
Summary: In this study, high-entropy (Sr0.2La0.2Nd0.2Sm0.2Eu0.2)TiO3 ceramics with ultra-low thermal conductivity were successfully synthesized by high-temperature and high-pressure solid-state reaction method. The resulting ceramics also exhibited good mechanical properties. This study provides a new synthesis strategy for the rapid and effective synthesis of perovskite ceramics with low thermal conductivity.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Yurun Liang, Yuewen Zhang, Jie Xu, Jingli Ma, Huifang Jiang, Xin Li, Baolin Zhang, Xu Chen, Yongtao Tian, Yanbing Han, Zhifeng Shi
Summary: SrZrS3 is a promising chalcogenide perovskite with unique advantages, including high abundance of consisting elements, high chemical stability, strong light absorption, and excellent carrier transport ability. A large-area and uniform SrZrS3 thin film was prepared by facile sputtering method, which exhibited high crystallinity and a band gap of 2.29 eV. The thin film showed high light absorption coefficient and carrier mobility, making it suitable for photodetector applications.
Article
Materials Science, Ceramics
Yangshuo Bai, Weixia Shen, Chao Fang, Liangchao Chen, Qianqian Wang, Biao Wan, Xiaopeng Jia, Yuewen Zhang, Zhuangfei Zhang
Summary: In this study, HfB2-HfC and HfB2-HfC-MoB high-density composites were prepared using one-step in-situ reactive spark plasma sintering method. The sintering temperature was found to significantly affect the densification mechanism, microstructural evolution, mechanical properties, and oxidation resistance of the composites. The optimal conditions for the preparation of HfB2-HfC and HfB2-HfC-MoB composites were determined, and their properties were investigated. The addition of molybdenum improved the hardness of the composite, but slightly decreased its fracture toughness. The ternary composite also exhibited a low and thermally stable oxidation rate up to 1400 degrees C in air atmosphere.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2023)
Article
Chemistry, Physical
Wenting Ji, Haidong Yu, Xinjian Li, Dayi Zhou, Xin Fan, Yuewen Zhang, Hongan Ma, Xiaopeng Jia
Summary: In this work, nickel doping was employed to enhance the thermoelectric properties of polycrystalline Bi2S3. The electrical conductivity was significantly enhanced by increasing the Ni doping content, while the absolute value of the Seebeck coefficient was gradually reduced. Nickel doping also introduced lattice distortions and suppressed thermal conductivity, resulting in a peak zT value of 0.23 at 543 K, which was about three times higher than that of pure Bi2S3.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yurun Liang, Yuewen Zhang, Jie Xu, Jingli Ma, Huifang Jiang, Xin Li, Baolin Zhang, Xu Chen, Yongtao Tian, Yanbing Han, Zhifeng Shi
Summary: In this study, large-area and uniform SrZrS3 thin film was successfully prepared, demonstrating high crystallinity, high absorbance coefficient, and high carrier mobility. These advantages make SrZrS3 thin film a promising candidate for photodetectors, solar cells, and other optoelectronic devices.
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)
