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SSRN 2022年

作者： Hu, Yang Zhang, Huazhang Zhoua, Jing Shen, Jie Chen, Binbin Li, Ang Chen, Wen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Physics School of Sciences Wuhan University of Technology Wuhan430070 China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya572025 China

The ferroelectric behavior of Bi1/2(Na0.8K0.2)1/2TiO3 (BNKT) relaxor has been tailored by Eu3+ doping and the intermediate relaxor state has been utilized for tristate ferroelectric memory effect. With the increase of the Eu3+ content, the electric field-induced long-range ferroelectric order is gradually disrupted. The P-E loops gradually become pinched and double-like, indicating that intermediate relaxor state appears during the polarization reversal. The disruption of ferroelectric order by Eu3+ doping is also manifested in the dielectric and piezoelectric properties, and structurally, in XRD patterns and PL spectra. In the series of Eu3+ doped BNKT, we find that the composition with the Eu3+ doping content of 3.0% would be suitable for tristate ferroelectric memory effect, in which two ferroelectric states with upward and downward polarizations and a middle relaxor state are served as the "+1", "−1" and "0" memory states, respectively. Verification experiment shows that the write and read of all the three states are feasible, with a reasonably good retention ability. Moreover, the luminescence property imparted by the dopant ion Eu3+ and its sensitivity to local structural symmetry also imply a potential possibility for non-destructive optical readout. © 2022, The Authors. All rights reserved.

关键词： Ferroelectricity

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Optical phonon dominated heat transport: A first-principles thermal conductivity study of BaSnS2

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Physical Review B 2021年第24期104卷 245209-245209页

作者： Zhi Li Hongyao Xie Shiqiang Hao Yi Xia Xianli Su Mercouri G. Kanatzidis Christopher Wolverton Xinfeng Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Department of Chemistry Northwestern University Evanston Illinois 60201 USA Department of Materials Science and Engineering Northwestern University Evanston Illinois 60208 USA

Acoustic phonons with long mean free paths have long been believed to control the lattice thermal conductivity κL in solids dominantly. In this study, however, we demonstrate an optical phonon dominated κL in BaSnS2. By solving the Peierls-Boltzmann transport equation, we predict a low diagonal lattice thermal conductivity κL(D) of 0.34Wm−1K−1 at 850 K, which is less than half the κL(D) of SnS at the same temperature. Further calculations following the Allen-Feldman model suggest the additional off-diagonal lattice thermal conductivity κL(OD) contributed by wavelike tunneling phonons. The κL(OD) becomes pronounced at the high temperature (0.17Wm−1K−1 at 850 K) and leads to a deviation of the temperature dependence of κL from T–1 to T–0.76, suggesting the potential lattice anharmonicity in BaSnS2. Further analyses indicate BaSnS2 has over 68% of κL contributed by optical phonons. We show this uncommon optical phonon dominated κL is due to the relatively high group velocities of optical phonons in BaSnS2. The phonon mode visualization suggests these relatively high-velocity optical phonons correspond to the antiphase vibrations in BaSnS2 monolayers, which is originated from the unique permutation of SnS3 tetrahedra. Finally, by investigating the mode-resolved group velocity, relaxation time, and Grüneisen parameter, we attribute the intrinsic low κL of BaSnS2 to the soft lattice and the relatively high lattice anharmonicity induced by the Ba-S weak bonding and Sn(II) lone-pair electrons. Our study explicitly analyzes the microscopic mechanism of optical phonon dominated heat transport in BaSnS2 and suggests it worthy of further experimental studies as an intrinsic low-κL material.

关键词： Chemical bonding Heat transfer Lattice dynamics Optical phonons Thermal conductivity

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Single-Atom Engineering of Covalent Organic Framework for Photocatalytic H2 Production Coupled with Benzylamine Oxidation

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Small 2023年第35期19卷

作者： Xia, Yang Zhu, Bicheng Li, Liuyi Ho, Wingkei Wu, Jinsong Chen, Haoming Yu, Jiaguo The Education University of Hong Kong Tai Po New Territories 999077 Hong Kong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Laboratory of Solar Fuel Faculty of Materials Science and Chemistry China University of Geosciences 388 Lumo Road Wuhan430074 China Key Laboratory of Eco-materials Advanced Technology College of Materials Science and Engineering Fuzhou University New Campus Fujian Minhou350108 China State Key Laboratory of Marine Pollution City University of Hong Kong Tat Chee Avenue Kowloon999077 Hong Kong Department of Chemistry National Taiwan University Taipei10617 Taiwan

In photocatalysis, reducing the exciton binding energy and boosting the conversion of excitons into free charge carriers are vital to enhance photocatalytic activity. This work presents a facile strategy of engineering Pt single atoms on a 2D hydrazone-based covalent organic framework (TCOF) to promote H2 production coupled with selective oxidation of benzylamine. The optimised TCOF-Pt SA photocatalyst with 3 wt% Pt single atom exhibited superior performance to TCOF and TCOF-supported Pt nanoparticle catalysts. The production rates of H2 and N-benzylidenebenzylamine over TCOF-Pt SA3 are 12.6 and 10.9 times higher than those over TCOF, respectively. Empirical characterisation and theoretical simulation showed that the atomically dispersed Pt is stabilised on the TCOF support through the coordinated N1-Pt-C2 sites, thereby induing the local polarization and improving the dielectric constant to reach the low exciton binding energy. These phenomena led to the promotion of exciton dissociation into electrons and holes and the acceleration of the separation and transport of photoexcited charge carriers from bulk to the surface. This work provides new insights into the regulation of exciton effect for the design of advanced polymer photocatalysts. © 2023 Wiley-VCH GmbH.

关键词： Oxidation

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Improvement of Magnetic Properties and Hardness by Doing Mo to a Medium Entropy Alloy

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SSRN 2023年

作者： Xiang, Zhaolong Wang, Engang Wang, Tao An, Bailing Xin, Yan Lu, Jun Niu, Rongmei Han, Ke Li, Xi Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming Shanghai Jiao Tong University Shanghai200240 China National High Magnetic Field Laboratory Florida State University TallahasseeFL32310 United States Northeastern University Shenyang110819 China State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan430074 China

In most technologies for improving material properties, the enhancement of one type of properties usually leads to the degradation of other properties. In this study, we demonstrated that we were able to simultaneously improve hardness, coercivity, and remanence by doping a FeCrCo Medium Entropy Alloy (MEA) with Mo in order to engineer the α→α1 + α2 spinodal decomposition of the MEA. Scanning Transmission Electron Microscopy (STEM) demonstrated that, in samples doped with Mo, decomposition led to an increase in the volume fraction of the α1 phase. Decomposition also led to an enhancement in the composition gap between the α1 and α2 phases, as well as to greater and greater lattice mismatch between the two phases at each stage of decomposition. Our first-principles calculations and Magnetic Force Microscopy (MFM) showed that the saturation magnetization gap between the α1 and α2 phases gradually increased, while the size of the magnetic domain decreased. Despite the fact that the magnetic moment of Mo atom was antiparallel to those of Co and Fe atoms in both α1 and α(according to first-principles calculations), Mo doping actually enhanced rather than diminished the magnetic properties of FeCrCo MEA while at the same time also increasing hardness. © 2023, The Authors. All rights reserved.

关键词： Spinodal decomposition

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Superelastic Carbonaceous Nanofibrous Aerogel Enables High Pressure-Sensitivity, Thermal Insulation and Photothermal Properties

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SSRN 2022年

作者： Wan, Fuqiang Wei, Jingjiang Zhu, Chenglong Liu, Yin Ping, Hang Xie, Hao Wang, Hao Wang, Weimin Fu, Zhengyi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Luoshi Road No. 122 Wuhan430070 China School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Luoshi Road No. 122 Wuhan430070 China

Carbonaceous aerogels attract extensive research interest due to their impressive physical properties such as high porosity, high electrical conductivity, low thermal conductivity, and low density. However, the low durability of the aerogels under compression is a concern due to the intrinsically weakness. In this work, superelastic, multimodal porous, carbonaceous nanofibrous aerogel (CAs) were prepared by carbonizing chitin aerogels (ChAs). The ChAs were prepared and structurally optimized by combining progressive typical dissolution–regeneration, solvent exchange with 50 wt% tert -butanol and lyophilization. The CAs exhibited remarkable elasticity and stability under compression, even under extreme temperatures. After the CAs had been subjected to loading-and-unloading cycle under the compressive strain ( ɛ ) of 50%, the CAs exhibited a very low energy-loss coefficient (0.15) at the first cycle. Moreover, the CAs maintained structural integrity with little deterioration of mechanical properties after 1000 cycles. The structural stability and the superelasticity conferred the CAs a fast and accurate piezoresistive response, which renders it potential for the fabrication of pressure sensor with a high gauge factor (GF, 14.24) under low ɛ (less than 2%). Furthermore, the biomass derived cost-efficient CAs demonstrated excellent thermal insulation and high photothermal-conversion efficiency of solar energy (96.4%). © 2022, The Authors. All rights reserved.

关键词： Thermal insulation

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Hollow Multishelled Structure: synthesis Chemistry and Application

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Chemical Research in Chinese Universities 2024年第3期40卷 346-393页

作者： MAO Dan WANG Chao LI Wei ZHOU Liang LIU Jian ZHENG Zjian ZHAO Yong CAO An-min WANG Shutao HUANG Jiaxing HUO Fengwei CHEN Hongyu MAI Liqiang YU Ranbo WANG Lianzhou LU Yunfeng YU Chengzhong YANG Qihua YANG Zhenzhong ZENG Hua Chun ZHAO Hujun TANG Zhiyong ZHAO Dongyuan WANG Dan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChineseAcademy of SciencesBeijing 100190P.R.China Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of SciencesBejing 100190P.R.China School of Fashion and Textiles The Hong Kong Polytechnic UniversityHong Kong SARP.R.China Department of Chemistry Fudan UniversityShanghai 200433P.R.China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070P.R.China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023P.R.China School of Chemistry Beihang UniversityBejing 100191P.R.China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology and Beijing National Laboratory for Molecular Sciences Institute of ChemistryChinese Academy of SciencesBeijing 100190P.R.China CAS Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190P.R.China School of Engineering Westlake UniversityHangzhou 310024P.R.China School of Flexible Electronics(Future Technologies) Nanjing Tech UniversityNanjing 211816P.R.China School of Science Westlake UniversityHangzhou 310024P.R.China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070P.R.China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083P.R.China School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology The University of QueenslandBrisbaneQueensland 4072Australia College of Life Science and Technology Bejing University of Chemical TechnologyBejing 100029P.R.China School of Chemistry and Molecular Engineering East China Normal UniversityShanghai 200241P.R.China College of Life Sciences Zhejiang Normal UniversityJinhua 321004P.R.China Department of Chemical Engineering Tsinghua UniversityBeijing 100

Hollow multishelled structure(HoMS),a promising and complex multifunctional structural system,features at least two shells that are separated by internal *** unique structure endows it with numerous advantages including low density,high loading capacity,large specific surface area,facilitated mass transport,and multiple spatial confinement *** the past twenty years,benefiting from the booming development of synthesis methods,various HoMS materials have been prepared and show promising applications in diverse areas.

关键词： Hollow multishelled structure synthesis chemistry Energy storage Catalysis Electromagnetic wave absorption Drug delivery Sensor

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Recycling of Waste Cathode materials for Lithium-Ion Batteries by Deep Eutectic Solvents

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ChemSusChem 2025年

作者： Liu, Yaqin Li, Changhao Zeng, Weihao Wang, Xuanpeng Wang, Juan Li, Dongqi Mu, Shichun State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Co. Ltd. Zhengzhou450001 China

The growing demand for recycling of spent lithium-ion batteries (LIBs) drives the need for sustainable methods to recover strategic metals from cathode materials. Deep eutectic solvents (DESs) emerge as green alternatives to conventional acid leaching, offering advantages in selective extraction, reduced chemical usage, and energy efficiency. This review first elucidates the formation mechanisms of DESs and investigates how the parameter optimization of their physicochemical properties (e.g., reducibility, acidity, viscosity) enhances metal recovery rates. Following an in-depth discussion on cathode material leaching processes using DESs, mainstream recovery methods for leaching products and cutting-edge advancements in direct regeneration of cathode active materials are comprehensively summarized. Finally, targeted strategies to address the current challenges in the application of DESs are proposed and an outlook on the future application of DESs in the field of LIB recovery is provided. In summary, this review provides valuable insights into the overall understanding of DESs, aiming to offer references in high-efficiency recycling of LIBs. © 2025 Wiley-VCH GmbH.

关键词： Recycling

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Significantly enhanced energy storage performance of BaTiO3-based amorphous thin films through the synergistic function of variable valence ions

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Ceramics International 2025年

作者： Yao, Yiming Tao, Cheng Huang, Rui Zhang, Jian Zhang, Tianyu Hao, Hua Yao, Zhonghua Liu, Hanxing Cao, Minghe State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China International School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China

Amorphous thin films have been widely studied due to the excellent breakdown strength in recent years. However, their practical application faces significant challenges primarily caused by low polarization and energy density. Herein, we propose a multi-variable valence ions doping strategy to enhance the energy storage performance of BaTiO3-based amorphous thin films. The Ba0.92Bi0.08Ti1-x(Ni0.5Mn0.5)xO3(BBTNM) amorphous thin films were fabricated by chemical solution deposition method. In addition, the synergistic effects of variable valence ions (Ni, Mn) on the microstructure, dielectric and energy storage properties of the films were systematically studied. Compared with the undoped Ba0.92Bi0.08TiO3(BBT) film, the polarization and energy storage performance of the BBTNM film have been significantly improved owing to the defect dipoles generated by the incorporation of variable valence ions. Notably, a high discharge energy density of 93.3 J/cm3 together with an energy efficiency of 83 % could be achieved in the x = 0.08 film at 7.05 MV/cm. Simultaneously, the film exhibits excellent thermal stability within the range of 20 °C–160 °C, and still maintains favorable performance after 105 cycles. Overall, this work introduces a new approach for designing BaTiO3-based thin film materials. © 2025

关键词： Amorphous films

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Synergistic Effects of Steel Slag and Wet Grinding on Ambient Cured Ground Granulated Blast Furnace Slag Activated by Sodium Sulfate

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SSRN 2022年

作者： Li, Yubo Zhang, Quangang Yang, Qifan He, Xingyang Su, Ying Tan, Hongbo Liu, Jing School of Civil Engineering Architecture and Environment Hubei University of Technology Wuhan430070 China Building Waterproof Engineering and Technology Research Center of Hubei Province Hubei University of Technology Wuhan430068 China State Key Laboratory of Silicate Materials for Architecture Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Alkali-activated materials (AAM) has been increasing attract attention for low energy consumption and low emission. Weak base AAM is a potential approach to further reduce energy consumption and environment friendly. However, low early strength and slow strength development due to low alkalinity of the activator limit the application in engineering. In this study, wet grinding was performed to promote the reaction activity of ground granulated blast furnace slag (GGBFS). In order to further accelerate hydration reaction and shorten setting time, steel slag (SS) was used as partial-substitution precursor. Wet-grinded SS-GGBFS (WSS-GS) binary binders activated by sodium sulfate were designed. The propertied of WSS-GS slurry was analyzed by pH values, conductivity and ICP test. The performances of WSS-GS pastes that contained different dosages SS (15%, 30% and 45%) and various activator concentration (1%, 3% and 5% Na2O-E) cured in ambient temperature were explored by rheological properties, setting time, compressive strength, hydration heat, XRD, TG-DTA and SEM-EDS tests. The results showed that the property of WSS-GS slurry was improved by addition of SS, early hydration reaction and compressive strength were promoted greatly. However, excess SS was harmful to strength development in later age for quantity reduction of hydration products and microstructure deterioration. 15%SS-85%GGBFS activated by 3% Na2O-E sodium sulfate was verified with an desired performance, initial setting time was shorten by 60% and 1 d compressive strength was increased by 91%. These results provide guidance on designing of weak base-activated slag system and utilization of mass SS. © 2022, The Authors. All rights reserved.

关键词： Sodium sulfate

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Recent advances in g-CN-based heterojunction photocatalysts

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Journal of materials Science & technology 2020年第21期56卷 1-17页

作者： Yunfeng Li Minghua Zhou Bei Cheng Yan Shao College of Environmental and Chemical Engineering Xi’an Polytechnic UniversityXi’an710000China Hubei Key Laboratory of Wudang Local Chinese Medicine Research Hubei University of MedicineShiyan 442000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Outpatient Taihe HospitalHubei University of MedicineShiyan 442000China

Semiconductor heterojunction photocatalysts have received much concern due to their great application prospect in solar energy utilization and *** construction of heterostructure with two or more semiconductor materials can integrate the advantages of multi-components to simultaneously improve the photo-induced charges separation,extend visible light absorption range and retain the high redox ability of ***,constructing of g-C3 N4-based heterostructure has become a hot focus due to the multiple merits of g-C3 N4,such as facile synthesis,high stability,unique optical and electronic *** review tries to give a comprehensive introduction and provide the possible tendency in design and fabrication of g-C3 N4-based heterojunction photocatalysts,especially in rational synthesis of type-II heterojunction,direct Z-scheme heterojunction,new type of S-scheme heterojunction,p-n heterojunction and Schottky ***,the special charges transfer mechanisms of g-C3 N4-based heterojunctions are discussed and their potential applications in photocatalytic water splitting,photo-degradation of contaminants and photo-reduction of CO2 into fuels are also ***,we attempt to propose some crucial issues based on the current research,which should be further investigated and resolved in this interesting research area.

关键词： Photocatalysis g-C3N4 Heterojunction Z-scheme S-scheme

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