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Rapid fabrication and thermoelectric performance of SnTe via non-equilibrium laser 3D printing

Rare Metals 2018年第4期37卷 300-307页

作者： Tian-Le Chen Chuang Luo Yong-Gao Yan Ji-Hui Yang Qing-Jie Zhang Ctirad Uher Xin-Feng Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Department of Materials Science and Engineering University of Washington Department of Physics University of Michigan

Thermoelectric technologies based on Seebeck and Peltier effects, as energy techniques able to directly convert heat into electricity and vice versa, hold promise for addressing the global energy and environmental problems. The development of efficient and low-cost thermo- electric modules is the key to their large-scale commercial applications. In this paper, using a non-equilibrium laser 3D printing technique, we focus an attention on the fabrication of mid-temperature p-type SnTe thermoelectric materials. The influence of laser power, scanning speed and layer thickness on the macro-defects, chemical and phase composition, microstructure and thermoelectric performance was systematically investigated. First and foremost, the processing parameter window for printing a highquality layer is determined. This is followed by the finite element method used to simulate and verify the influence of the laser-induced molten pool temperature distribution on the final composition and microstructure. Finally, the high-performance SnTe layer with 10 mm × 10 mm in area is produced within seconds with room temperature Seebeck coefficient close to that of SnTe manufactured by the traditional methods. Consequently, this work lays a solid foundation for the future fabrication of thermoelectric modules using laser non-equilibrium printing techniques.

关键词： Selective laser melting Laser non-equilibriumheating SnTe compound Thermoelectric performance

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Construction of S-scheme heterostructure via anion and cation vacancy mediated electrostatically driven self-assembly in Cd 1-x S-CdS 1-x for robust photocatalytic CO 2 reduction

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Nano Energy 2025年 142卷

作者： Wen Li Enyang Wang Haiqing Wang Yong Yang Shuxian Hu Hong Liu Shandong Key Laboratory of Functional Materials for Integrated Lithium Niobate Photonics Institute of Advanced Interdisciplinary Research (IAIR) College of Chemistry and Chemical Engineering University of Jinan Jinan 250022 China Department of Physics University of Science and Technology Beijing Beijing 100083 China State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal Materials Northwestern Polytechnical University Xi’an Shaanxi 710072 China State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China

Although vacancy engineering strategies have been extensively developed for single semiconductor photocatalysts, the exploration of vacancy roles and their intrinsic mechanisms in heterojunction construction remains limited. Herein, a novel S-scheme system was elaborately fabricated through synergistic engineering of anion and cation vacancies in two distinct defective semiconductors: S-vacancy-rich CdS 1-x and Cd-vacancy-rich Cd 1-x S nanoparticles. Interestingly, the formation of Cd 1-x S-CdS 1-x heterostructure was spontaneously driven by electrostatic interactions between inherently positively charged CdS 1-x and negatively charged Cd 1-x S. Remarkably, the S-scheme Cd 1-x S-CdS 1-x system exhibited optimal performance for photocatalytic CO 2 reduction reaction (CO 2 RR) in solid-gas mode, achieving CO production rates 60-fold higher than pristine CdS, 30-fold greater than Cd 1-x S, and 12-fold superior to CdS 1-x . Combined experimental characterization and theoretical simulations revealed that the dual-vacancy engineering induced: (i) optimized staggered band alignment, (ii) accelerated interfacial charge transfer, and (iii) enhanced adsorption of CO₂ and H₂O reactants. Particularly, pre-adsorbed H₂O molecules on Cd 1-x S were found to facilitate subsequent CO₂ adsorption, effectively lowering the energy barrier for CO₂-to- COOH conversion during CO generation. The proposed vacancy co-engineering strategy opens more opportunities for novel S-scheme system design.

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synthesis of Cerium-doped SnO2 Microsphere with g-C3N4 for 1-ppm-level Acetone Detection Using Resistance Control Strategy

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SSRN 2025年

作者： He, Jinyou Xie, Ting Jiang, Guojian Kang, Yuhao Li, Shuang Chi, Jie Wu, Dandan School of Materials Science and Engineering Shanghai Institute of Technology 100 Haiquan Road Shanghai201418 China Key Laboratory of Inorganic Functional Materials and Devices Chinese Academy of Sciences Shanghai20050 China State Key Laboratory of Mineral Processing Beijing102628 China Anhui Province Key Laboratory of Critical Friction Pair for Advanced Equipment Hefei231200 China

With the increasing prevalence of diabetes in the world, there is a growing demand for convenient and effective methods to detect diabetes. The focus of this research is to develop a cost-effective gas sensing material for the detection of the biomarker (acetone) in the breath of diabetes. A low-cost composite material Ce-SnO2/g-C3N4 (CSCN) was synthesized by combining hydrothermal and thermal method. At the optimal operating temperature of 260℃, CSCN exhibited a high response of 130.7 to 100ppm acetone, with a response/recovery time of 8/86 seconds. The sensing mechanism of CSCN is based on the oxidation-reduction reaction between adsorbed oxygen ions and acetone molecules, and the high response is attributed to the formation of Ce-SnO2/g-C3N4 heterojunction. This study proposes a fabrication strategy for N-type semiconductor materials. Firstly, synthesize materials with high electric conductivity to produce low resistance when in contact with the target gas, then composite other materials to increase the baseline resistance in the air. When it is in the target gas, the resistance is mainly related to high electric conductivity materials, which means that its low resistance value will not significantly change. This strategy will further optimize the development and application of high-performance sensors. © 2025, The Authors. All rights reserved.

关键词： Oxide semiconductors

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Atomic Occupation and Role of Cr Atoms in Cr-Doped Ni43co7mn39sn11 Magnetic Shape Memory Alloys

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SSRN 2022年

作者： Wang, Songwang Yang, Ruoou Lu, Guangduo Yi, Lizhi Liu, Min Xu, Yunli Pan, Liqing Hubei Engineering Research Center of Weak Magnetic-field Detection College of Science China Three Gorges University Yichang443002 China State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China Shanghai Synchrotron Radiation Facility Zhangjiang National Lab Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai201204 China

The atomic occupation, magnetic properties and the relationship between them of Ni43Co7Mn39-xCrxSn11( x =0, 0.4, 0.6, 0.8, 1.0, 1.2 at.%) alloys have been systematically investigated. To elucidate the occupancy of Cr atoms, extended X-ray absorption fine structure (EXAFS) is performed and Cr K-edge EXAFS analysis determines that Cr atoms occupy Y site of the Ni43Co7Mn38Cr1Sn11 sample. Ferromagnetic resonance shows the evolution of the microscopic magnetic properties of the magnetic atoms with the increase of Cr doping content, which further confirms the Y-site occupation of Cr atoms. The experimental results show that in the Ni43Co7Mn39Sn11 system, Cr doping replaces Mn at the Y site, breaking the symmetry of the crystal field of Mn atoms at the Z site, reducing the atomic displacement potential. The doping of Cr atoms significantly enhances the driving force of its magnetic field-induced martensitic transformation. © 2022, The Authors. All rights reserved.

关键词： Cobalt alloys

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Preparation and laser performances of Nd3+:GSGG ceramic powder raw materials

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Journal of materials Science & technology 2019年第5期35卷 926-929页

作者： Shuming Wang Xin Lin Qing Ye Jiangshan Li Xiaofang Zhang Ruiping Wang Yanru Wang Department of Materials Science and Engineering University of Science & Technology Beijing Beijing100083China State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi'an 710072 China

This paper explores a new laser working material: gallium scandium gadolinium(GSGG), which was successfully prepared by one step co-precipitation method, and the potential properties of this Nd^3+ doped laser ceramic raw materials were proposed. The size of the prepared powder was uniform and mainly about 65 nm. The GSGG phase could be obtained after a heat-treatment of 1000℃ for 4h, and the characterized fluorescence decay curves showed that about 1 at.% concentration of Nd^3+in Nd^3+:GSGG precursor presented optimum fluorescence intensity at 1.06μm waveband.

关键词： Nd^3+:GSGG One step co-precipitation Laser properties

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Enhanced Oxidase-Mimic Constructed by Luminescent Carbon Dots Loaded on Mil-53(Fe)-No2 for Dual-Mode Detection of Gallic Acid and L-Cysteine in Food and Humans

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SSRN 2023年

作者： Liu, Junxue Ma, Wenyan Wang, Yufei Gu, Qinfen Pan, Qinhe Zong, Siyu Qin, Minghao Li, Jiyang State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University 2699 Qianjin Street Changchun130012 China College of Chemistry and Chemical Engineering Liaoning Normal University Huanghe Road 850# Dalian116029 China 800 Blackburn Road ClaytonVIC3168 Australia Key Laboratory of Advanced Materials of Tropical Island Resources Ministry of Education School of Chemical Engineering and Technology College of Science Hainan University Haikou570228 China

Monitoring of gallic acid (GA) in food and L-cysteine (Cys) in humans is crucial for body health. Nanozyme-mediated colorimetric strategy for evaluating them has been widely applied nowadays, however, the inferior efficient and susceptible single-signal recognition limit its further application. Herein, a sensitive biosensor was first constructed for bimodal detection of GA and Cys based on CDs@MIL-53(Fe)-NO2, prepared through a facile and time-saving microwave treatment. Benefiting from the excellent fluorescent and electron transfer properties of CDs, CDs@MIL-53(Fe)-NO2 exhibited significant enhanced blue fluorescence and oxidase-like activity, which could oxide colorless 3,3',5,5'-tetramethylbenzidinewithout H2O2, and the blue product could quench the fluorescence of composite. The dual-mode assay based on such bifunctional nanozyme showed an extremely sensitivity towards GA/Cys with the detection limit of 62/65 nM and 9.2/9.4 nM in colorimetric/fluorescent modes, respectively. The practicability in real samples and portability based on a smartphone of the analysis has been investigated with reliable results. © 2023, The Authors. All rights reserved.

关键词： Colorimetry

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High salinity brine zero liquid discharge enabled by fabric-based evaporator with heterogeneous ion diffusion

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Separation and Purification technology 2025年 376卷

作者： Zhuo, Lei Zhang, Zhixun Liu, Zixiao Xiao, Xingfang Zhang, Qian Wang, Yuanfeng Xu, Weilin State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China Department of Materials Science and Engineering University of California Los Angeles Los AngelesCA90095 United States

Designing solar evaporators with efficient water transport pathways represents an innovative solution for industrial brine wastewater desalination and resource recovery. However, many existing approaches struggle to sustain performance under high-salinity conditions, posing significant challenges for practical applications. Herein, we report a fabric-based evaporator with heterogeneous ion diffusion (FEHID) designed for zero liquid discharge (ZLD) desalination of high-concentration saline water. Constructed using pyrrole modified cotton fabric with distinct plain and tubular patterns, the FEHID exploits heterogeneous ion diffusion to control salt crystallization while achieving a photothermal conversion efficiency of 92.6 % under one sun illumination. The tubular sections enhanced water supply via capillary action, directing saline water flow and promoting localized salt crystallization in plain regions for easy collection. Additionally, the water supply regulated temperature of the evaporator, thereby maximizing thermal utilization efficiency. The FEHID achieved an evaporation rate of 1.53 kg·m−2·h−1 for 15 wt% saline water under one sun illumination, which was accomplished by adjusting the number of filled yarns, maintaining stable performance during an 8-hour desalination test. Outdoor experiments further demonstrated superior evaporation efficiency and salt resistance over seven days, with freshwater output exceeding 10.5 L·m−2·d−1. The scalable, industrially manufacturable design highlights FEHID as a viable approach for sustainable saline wastewater treatment and resource recovery. © 2025

关键词： Desalination

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Microstructure and composition characterization of teeth from different species 42

Microstructure and composition characterization of teeth fro...

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42nd International Conference on advanced Ceramics and Composites, ICACC 2018

作者： Han, Jun Zeng, Hui Ping, Hang Jia, Wei Xie, Jingjing Chi, Wenhao Xiea, Hao Fu, Zhengyi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology WuhanPR430070 China WuHan institute of Marine Electric Propulsion WuhanPR430064 China

ISBN: (纸本)9781119543305

Biological materials are well worth learning for our own synthetic materials. It’s of great interest that the growth rate of teeth is different in species. The growth rate of human teeth is slow, but faster for rat and shark. The microstructure and composition difference may have a great effect on the growth rate. In this study, the microstructure and composition from human teeth, rat teeth and shark teeth were well characterized by scanning electron microscopy and X-ray diffraction. It is demonstrated that the size of individual apatite crystal and the growth direction of apatites in those enamel or enameloid display different types. The diameter of shark enameloid is the biggest. Three growth directions can be observed in shark enameloid but only two in human and rat. The main inorganic composition of the three teeth is also different. It is hydroxyapatite (HAP) for human and rat teeth, while fluorapatite (FAP) for shade. The XRD patterns also indicate that the assemble degree of human teeth is the most sophisticated. The results may give useful insight into new materials synthesis technology. © 2019, American Ceramic Society. All rights reserved.

关键词： Rats

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Detailed Structures and Formation Mechanisms of Well-Known Al_(10)RE_2Mn_7 Phase in Die-Cast Mg-4Al-4RE-0.3Mn Alloy

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Acta Metallurgica Sinica(English Letters) 2019年第2期32卷 178-186页

作者： Qiang Yang Shu-Hui Lv Fan-Zhi Meng Kai Guan Bai-Shun Li Xu-Hu Zhang Jing-Qi Zhang Xiao-Juan Liu Jian Meng State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry ChineseAcademy of Sciences School of Materials Science and Engineering Changchun University of Science and Technology University of Sciences and Technology of China Aerospace Research Institute of Materials and Processing Technology

The detailed structures and the corresponding formation mechanisms of the well-known Al_(10)RE_2Mn_7 phase in the conventional die-cast Mg–4Al–4RE–0.3Mn alloy were thoroughly investigated using transmission electron microscopy(TEM). The results indicate that the Al_(10)RE_2Mn_7 phase ordinarily contains both normal (111) twins and orientation *** detailed TEM observations and density functional theory calculations indicate that the Al_(10)RE_2Mn_7 phase is transferred from the Al_8REMn_4 phase following an orientation relationship as [010]_(Al_8REMn_4)//[101]_(Al_(10)RE_2Mn_7) and (101)_(Al_8REMn_4)//(110)_(Al_(10)RE_2Mn_7). Moreover, forming orientation twins in the Al_(10)RE_2Mn_7 phase is attributed to the blurry regions at incoherent twin boundaries in the Al_8REMn_4 phase. Finally, these formed orientation twins result in the (111) twins in the Al_(10)RE_2Mn_7 phase.

关键词： Transmission electron microscopy Phase transformation Intermetallic phase Twin boundary Orientation relationship

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Modulation of magnetic and electrical properties of bilayer graphene quantum dots using rotational stacking faults

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Chinese Physics B 2019年第7期28卷 504-510页

作者： Hong-Ping Yang Wen-Juan Yuan Jun Luo Jing Zhu National Center for Electron Microscopy in Beijing School of Materials Science and Engineering the State Key Laboratory of New Ceramics and Fine Processing Key Laboratory of Advanced Materials(MOE) Tsinghua University Beijing 100084 China Center for Electron Microscopy Institute for New Energy Materials & Low-Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology Tianjin 300384 China

Bilayer graphene quantum dots with rotational stacking faults(RSFs) having different rotational angles were *** the first-principles calculation, we determined that these stacking faults could quantitatively modulate the magnetism and the distribution of spin and energy levels in the electronic structures of the *** addition, by examining the spatial distribution of unpaired spins and Bader charge analysis, we found that the main source of magnetic moment originated from the edge atoms of the quantum *** research results can potentially provide a new path for producing all-carbon nanodevices with different electrical and magnetic properties.

关键词： bilayer graphene quantum dots rotational stacking faults first-principles calculation

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