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Enabling highly efficient and broadband electromagnetic wave absorption by tuning impedance match in high-entropy transition metal diborides (HETMB_(2))

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Journal of advanced Ceramics 2021年第6期10卷 1299-1316页

作者： Weiming ZHANG Fu-Zhi DAI Huimin XIANG Biao ZHAO Xiaohui WANG Na NI Rajamallu KARRE Shijiang WU Yanchun ZHOU Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China Henan Key Laboratory of Aeronautical Materials and Application Technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhou 450046China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Key Lab of Education Ministry for Power Machinery and Engineering School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Zibo Firststar New Material Incorporated Co. Ltd.Zibo 255000China

The advance in communication technology has triggered worldwide concern on electromagnetic wave *** cope with this challenge,exploring high-performance electromagnetic(EM)wave absorbing materials with dielectric and magnetic losses coupling is urgently *** the EM wave absorbers,transition metal diborides(TMB2)possess excellent dielectric loss ***,akin to other single dielectric materials,poor impedance match leads to inferior ***-entropy engineering is expected to be effective in tailoring the balance between dielectric and magnetic losses through compositional ***,three HE TMB2 powders with nominal equimolar TM including HE TMB2-I(TM=Zr,Hf,Nb,Ta),HE TMB2-2(TM=Ti,Zr,Hf,Nb,Ta),and HE TMB2-3(TM=Cr,Zr,Hf,Nb,Ta)have been designed and prepared by one-step boro/carbothermal *** a result of synergistic effects of strong attenuation capability and impedance match,HE TMB2-1 shows much improved performance with the optimal minimum reflection loss(RL_(min))of-59.6 dB(8.48 GHz,2.68 mm)and effective absorption bandwidth(EAB)of 7.6 GHz(2.3 mm).Most impressively,incorporating Cr in HE TMB2-3 greatly improves the impedance match over 1-18 GHz,thus achieving the RLmin of-56.2 dB(8.48 GHz,2.63 mm)and the EAB of 11.0 GHz(2.2 mm),which is superior to most other EM wave absorbing *** work reveals that constructing high-entropy compounds,especially by incorporating magnetic elements,is effectual in tailoring the impedance match for highly conductive compounds,i.e.,tuning electrical conductivity and boosting magnetic loss to realize highly efficient and broadband EM wave absorption with dielectric and magnetic coupling in single-phase materials.

关键词： transition metal diboride(TMB2) high-entropy(HE)ceramics electronic structure microwave absorption dielectric and magnetic losses coupling

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Near-infrared BODIPY-based theranostic agents for photothermal and combinatory therapy of cancers, where do we stand in year 2025

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Coordination Chemistry Reviews 2025年 541卷

作者： Iqbal, Muhammad Sohaib Ahmad, Haroon Yu, Chen Huang, Haiyan Guo, Bing School of Science Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application Harbin Institute of Technology Shenzhen 518055 China

Photothermal therapy (PTT) is a promising method in tumor treatments due to its high effectiveness in destructing tumors locally and precisely with spatiotemporal controllability and minimal invasiveness, which strongly relies on the efficiency of PTT agents. Recently, the research on BODIPY-based PTT agents is burgeoning because of their intrinsic merits including large extinction coefficient, ease to tune the structure and photophysical properties within near-infrared (NIR) region. Herein, we offer a timely update on the recent advancements of BODIPYs for PTT and combinatory theranostic applications in the last three years. Importantly, the special focus is on the synthetic strategies for NIR BODIPYs with optimal PTT and customized performances for cancer theranostics, which include core functionalization, donor-acceptor adjustment, π-π conjugation and aggregation controllability. Furthermore, we summarize the emerging photoacoustic, fluorescence, multimodal imaging in the NIR windows for cancer theranostics with BODIPYs. More importantly, the combinatory photothermal modalities with BODIPYs for enhanced therapeutic outcomes are pointed out. Lastly, to resolve the current challenges related to BODIPYs, some insights on future advancements and the role of AI to automate the designing process of BODIPY-based PTAs have been discussed. Hopefully, this review will stimulate interest among researchers to expedite the translation of BODIPY from bench to bedside. © 2025 Elsevier B.V.

关键词： BODIPYs Combination therapy Imaging Near-infrared Photothermal therapy Theranostics

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原子分散的钪路易斯酸位点修饰氮化碳用于高效光催化合成过氧化氢

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science China Materials 2023年第2期66卷 672-678页

作者：姚爽唐婷申勇立杨帆安长华 Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials&Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China

光催化氧还原制备过氧化氢具有节能、环保等优点.然而,低活性以及低选择性的问题限制了其实际应用.基于金属离子耦合电子转移机制,本文通过浸渍-煅烧法合成了原子分散的钪路易斯酸位点修饰的氮化碳,光合成过氧化氢速率高达55μmol h^(-... 详细信息

光催化氧还原制备过氧化氢具有节能、环保等优点.然而,低活性以及低选择性的问题限制了其实际应用.基于金属离子耦合电子转移机制,本文通过浸渍-煅烧法合成了原子分散的钪路易斯酸位点修饰的氮化碳,光合成过氧化氢速率高达55μmol h^(-1),是氮化碳的6.2倍.光催化性能的提升归因于原子分散钪路易斯酸位点与·O_(2)^(-)结合,提高了O_(2)的得电子能力,减少了·O_(2)^(-)逆反应的发生,促进了氧还原反应进行.密度泛函理论模拟及Koutecky-Levich分析表明,钪原子的引入减少了O–O键的断裂,提高了合成过氧化氢的选择性.本研究提出了一种路易斯酸单金属位点光催化剂设计新概念,可同时提升催化反应活性及选择性.

关键词：路易斯酸光催化合成氮化碳氧还原反应过氧化氢光合成煅烧法还原制备

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Ten concerns of Zn metal anode for rechargeable aqueous zinc batteries

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Joule 2023年第6期7卷 1145-1175页

作者： Yu, Xiaoyu Li, Zhengang Wu, Xiaohong Zhang, Haitang Zhao, Qingao Liang, Hanfeng Wang, Huan Chao, Dongliang Wang, Fei Qiao, Yu Zhou, Haoshen Sun, Shi-Gang Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China College of Chemistry Nankai University Tianjin300071 China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials School of Chemistry and Materials Fudan University Shanghai200433 China Department of Chemistry Department of Materials Science Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University Shanghai200433 China Xiamen361005 China Center of Energy-Storage Materials & Technology College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional Materials National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing210093 China

Thousands of articles have been reported to enhance the electrochemical stability/reversibility of the Zn-metal anode (ZMA). However, some scientific concepts, engineering factors, mechanism models, and characterization limitations are still not comprehensively understood. Here, based on fair experiments, we proposed ten critical concerns on ZMAs, including the following: (1) scientific concepts misunderstanding on basic electrochemistry and crystallography terms, (2) non-scientific engineering factors affecting Coulombic efficiency (CE) assessment based on operation modes and "edge effect," and cell parameters on regulating battery performance, (3) influence mechanisms of coating modifications and Zn4(OH)6SO4·xH2O (ZHS) byproduct, and (4) limitations of typically used characterization tools and accuracy of advanced in situ technique paradigms. We not only proposed existing dilemmas but also provided the right medicine for corresponding pains. This perspective hopes to awaken research status of blind advance on aqueous zinc batteries and provide constructive guidance for building theory models and designing modification strategies to meet the challenges of energy storage scientifically and effectively. © 2023 Elsevier Inc.

关键词： Corrosion

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Thermal cycling performance of La_(2)Ce_(2)O_(7)/YSZ TBCs with Pt/Dy co-doped NiAl bond coat on single crystal superalloy

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Rare Metals 2021年第9期40卷 2568-2578页

作者： Zi-Min Zhou Hui Peng Lei Zheng Hong-Bo Guo Sheng-Kai Gong School of Materials Science and Engineering Beihang UniversityBeijing 100191China Beijing Key Laboratory for Advanced Functional Material and Thin Film Technology Beihang UniversityBeijing 100191China Key Laboratory of Aerospace Materials and Performance(Ministry of Education) Beihang UniversityBeijing 100191China

Thermal barrier coatings(TBCs) consisting ofLa_(2)Ce_(2)O_(7)(LCO) and Y_(2)O_(3)-stabilized-ZrO_(2)(YSZ) doubleceramic layer and Dy/Pt co-doped NiAl bond coat were produced by electron beam physical vapor deposition(EBPVD). Thermal cyclic performance of the TBCs was evaluated by flame shock testing at 1300 ℃. For comparison, the TBCs with a undoped NiAl bond coat were also studied. The microstructural evolution and failure mechanisms of the above TBCs during thermal cycling were investigated. Spallation failure of the TBCs with the undoped bond coat occurs after around 500 cycles by cracking at the interface between YSZ ceramic layer and thermally grown oxides(TGO) layer. The TBCs with Pt/Dy modified bond coat reveal improved interface bonding even after 1200 thermal cycles, whereas some delamination cracks are presented in the LCO layer. On the other hand,the Pt/Dy modified bond coat effectively suppresses the formation of the needle-like topologically closed packed phases(TCP) in the single crystal superalloy.

关键词： Thermal barrier coatings NiAl bond coat Pt/Dy co-doping Electron beam physical vapor deposition Thermal cycling Interdiffusion

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Exploring the effect of grain/phase boundary transition phases on the wear resistance of Ni-based metal-ceramic composite coatings: Based on experimental study and finite element analysis

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Tribology International 2025年 211卷

作者： Wang, YuXin Gui, HaiLian Li, Xiang Dong, YanChun Yang, Xing He, ZhiHui Zhao, DongShu Yang, Yong Zhao, HongJian State Key Laboratory of High Performance Roll Materials and Composite Forming School of Materials Science and Engineering Hebei University of Technology Tianjin300132 China Key Lab. for New Type of Functional Materials in Hebei Province School of Materials Science and Engineering Hebei University of Technology Tianjin300132 China College of Materials Science and Engineering Taiyuan University of Science and Technology Taiyuan030024 China

In this study, we successfully prepared NiCrBSi-TiCrN composite coatings containing Cr-rich transition phases at the grain/phase boundary by using plasma spraying technology and compositional adjustment strategies. We thoroughly explored the impact of Cr-rich transition phases on the wear performance of the composite coatings. The phase composition and microstructure were characterized by XRD, SEM and TEM techniques, the wear behavior of the coatings was tested by reciprocating friction and wear tester, and the accuracy and reliability of the experimental results were verified with FEA tools. Results revealed that a Cr-rich transition phase was formed at the interface between the Ni-based alloy phase and the TiCrN ceramic phase, as well as at the TiCrN grain boundaries, which was attributed to the different solidification times of the physical phases with the increase of the Cr content in the Ti/Cr ratio. Grain/phase boundary Cr-rich transition phase significantly improves abrasion performance of the composite coating, improves ceramic phase toughness and alleviates stress concentration phenomenon within the coating during wear, improves the anti-cracking and anti-peeling properties to ensure effective reinforcement of NiCrBSi composite coatings by TiCrN ceramics. The results of the study are significant for optimizing the coating composition and structure design, and developing high-performance, long-endurance metal-based ceramic composite coating materials. © 2025 Elsevier Ltd

关键词： composite coatings

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Recent progress on surface chemistryⅠ:Assembly and reaction

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Chinese Chemical Letters 2024年第12期35卷 43-94页

作者： Xin Li Zhen Xu Donglei Bu Jinming Cai Huamei Chen Qi Chen Ting Chen Fang Cheng Lifeng Chi Wenjie Dong Zhenchao Dong Shixuan Du Qitang Fan Xing Fan Qiang Fu Song Gao Jing Guo Weijun Guo Yang He Shimin Hou Ying Jiang Huihui Kong Baojun Li Dengyuan Li Jie Li Qing Li Ruoning Li Shuying Li Yuxuan Lin Mengxi Liu Peinian Liu Yanyan Liu Jingtao Lü Chuanxu Ma Haoyang Pan JinLiang Pan Minghu Pan Xiaohui Qiu Ziyong Shen Shijing Tan Bing Wang Dong Wang Li Wang Lili Wang Tao Wang Xiang Wang Xingyue Wang Xueyan Wang Yansong Wang Yu Wang Kai Wu Wei Xu Na Xue Linghao Yan Fan Yang Zhiyong Yang Chi Zhang Xue Zhang Yang Zhang Yao Zhang Xiong Zhou Junfa Zhu Yajie Zhang Feixue Gao Yongfeng Wang Center for Carbon-based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices School of ElectronicsPeking UniversityBeijing 100871China Spin-X Institute School of MicroelectronicsSouth China University of TechnologyGuangzhou 511442China School of Materials and Energy Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage DevicesGuangdong University of TechnologyGuangzhou 510006China Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093 China i-Lab CAS Key Laboratory of Nanophotonic Materials and DevicesSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of SciencesBeijing 100190China State Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced MaterialsJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts and TelecommunicationsNanjing 210023China Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Institute of Physics&University of Chinese Academy of Sciences Beijing 100190China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China College of Chemistry Beijing Normal UniversityBeijing 100875China Beijing National Laboratory for Molecular Sciences(BNLMS) College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China School

Surface chemistry focuses on the investigation of the adsorption,migration,assembly,activation,reaction,and desorption of atoms and molecules at *** chemistry plays the pivotal roles in both fundamental science and applied *** review will summarize the recent progresses on surface assembly,synthesis and catalysis investigated mainly by scanning tunneling microscopy and atomic force *** assemblies of water and small biomolecules,construction of Sierpin′ski triangles and surface chirality are ***-surface synthesis of conjugated carbo-and heterocycles and other kinds of carbon nanostructures are *** model catalysis,including single-atom catalysis and electrochemical catalysis,are discussed at the single-atom level.

关键词： Surface chemistry Assembly Surface synthesis Catalysis on surface Surface electrochemical processes

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A study on porosity investigation of compacted bentonite in various densities by using micro-computed tomography images analysis

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Kerntechnik 2024年第3期89卷 327-339页

作者： Yang, Wudi Chen, Jui-Chi Li, Jing-Xing Yang, Song Shi, Yunfeng Chen, Chien-Jung Lu, Hui-Min Lu, Chien-Ping Tsai, Fang-Chang Lee, Chuan-Pin 12466 Xiamen University Xiamen361005 China Radioactive Waste Disposal Technology R&D Center 34881 National Tsing Hua Universi Hsinchu City Taiwan Department of Applied Chemistry National Chi Nan University Nantuo Taiwan School of Nuclear Sciences and Engineering 12394 East China University of Technology Nanchang330013 China Taiyuan030006 China Fundamental Science on Radioactive Geology and Technology Exploration Laboratory 12394 East China University of Technology Nanchang330013 China Department of Nuclear Medicine National Taiwan University Hospital College of Medicine National Taiwan University Taipei Taiwan Hubei Key Laboratory of Polymer Materials Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials School of Materials Science and Engineering 12563 Hubei University Wuhan430062 China

Compacting a material means applying pressure so that the material itself loses its internal pores. It improves the homogeneity of the material itself and increases its density. The pore structure of compacted clay is also an important factor that affects its mechanical properties, permeability and water absorption. In this study, MX-80 bentonite clay was first compacted into round cakes of different densities and then subjected to tomography image analysis technique using micro-computed tomography (micro-CT) at millimeter scale of accuracy for 1.0-2.0g/cm3 compacted clay (thickness of 0.3cm bentonite compacted clay). In this paper, we use the latest commercial specifically for scientific visualization, materials science, non-destructive testing, numerical simulation of chromatographic imaging and other functions of a powerful visualization of the image analyzing method. © 2024 Walter de Gruyter GmbH, Berlin/Boston.

关键词： Bentonite

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Shape Memory Elastomers: A Review of Molecular Structures, Stimulus Mechanisms, and Emerging Applications

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Polymer science & technology 2025年第4期1卷 271-298页

作者： Yuan Yuan Yu Hong Ping Xiang Long Fei Fan Ming Qiu Zhang Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter School of Materials and Energy Guangdong University of Technology 510006 Guangzhou Guangdong China College of Textile Science and Engineering Wuyi University 529020 Jiangmen Guangdong China Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education GD HPPC Lab School of Chemistry Sun Yat-Sen University 510275 Guangzhou China

Shape memory elastomers, a class of smart polymers, can remember their initial shapes under external stimuli and have potential applications in many fields, including medical devices, artificial muscles, actuators, and soft robots. Therefore, this review aims to explore research progress on the molecular structures, stimuli-responsive mechanisms, and emerging applications of shape memory elastomers and their composites in recent years. First, the molecular structures, shape memory effects, and working mechanisms of shape memory elastomers are thoroughly discussed and explained based on different external stimuli, including heat, light, electricity, magnetic fields, and solvents. Subsequently, emerging applications of shape memory elastomers, such as artificial muscles, actuators, soft robots, smart electronics, and aerospace, are presented. Finally, future challenges and insights into shape memory elastomers are discussed. Shape memory elastomers have received extensive attention and show great application potential in many emerging fields.

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Design,Preparation and Properties of Bio-inspired Hierarchical Structure Yarns with Enhanced Thermal Insulation and Water Transfer Ability

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Chemical Research in Chinese Universities 2021年第3期37卷 558-564页

作者： JIA Yueran GONG Shun ZHANG Shu ZHAO Shikun QIN Zhen PAN Kai Beijing Key Laboratory of Advanced Functional Polymer Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029P.R.China College of Materials Science and Engineering Beijing University of Chemical TechnologyBeijing100029P.R.China

Encouraged by the porous and stable structure of cold-resist animals’hair or feather,bio-inspired hierarchical structure yarns combining polyacrylonitrile(PAN)nanofibers and polypropylene(PP)hollow microfibers have been developed by a modified conjugate electrospinning *** cross-linking has been built to increase fibers adhesion and construct interlayer support for nanofibrous *** nanofibers and hollow microfibers construct a stable porous structure with porosity of 62%,providing excellent thermal insulating ability[temperature difference(|ΔT|)between skin and yarn surface is 4.9℃]as well as good mechanical *** interestingly,the water transfer ability(infiltrate the yarn in 10 s)of synthetic fibers has been improved greatly by the combination of thin diameter nanofibers to the *** is believed that the research lays the foundation for bio-inspired engineering technology in the manufacture of thermal comfort.

关键词： Bio-inspired material Hierarchical structure yarn Thermal insulation Water transfer ability

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