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Synthesis and Applications of Bipo4: Eu3+/Sio2 Phosphor and its Enhanced Catalytic Activity of 4np with Agbr Loading

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SSRN 2024年

作者： Li, Huiya Wang, Xiaomeng Ma, Yao Zhao, Xiangyi Xie, Jixing Jiao, Yunhong Ma, Haiyun Qu, Hongqiang Xu, Jianzhong Wang, Liyong College of Chemistry and Materials Science State Key Laboratory of New Pharmaceutical Preparations and Excipients The Flame Retardant and Processing Technology Engineering Research Center Key Laboratory of Analytical Science and Technology of Hebei Province Hebei University No. 180 Wusi Road Baoding071002 China

In this work, BiPO4: Eu3+ composite decorated by SiO2 and AgBr was successfully synthesized by a facile deposition precipitation method. The structure, morphology and composition of obtained samples were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), Energy dispersive spectrometry (EDS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectrometer (FTIR), diffuse reflectance spectroscopy (DRS), Photoluminescence Spectroscopy (PL) and Electrochemical impedance spectroscopy (EIS) techniques. Furthermore, luminescence and catalytic properties of composites were investigated. The results show that the fluorescence intensities of the samples obviously enhance after SiO2 modification. In addition, the optimized phosphor can be potentially used as a red phosphor in fluorescent films and LEDs. Furthermore, the synthesized BPO: Eu3+/SiO2/AgBr composites exhibited high performance in the catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). Thus, these results provide a concise direction for the design of composites that can be used for the versatile removal of organics and phosphors development. © 2024, The Authors. All rights reserved.

关键词： Fluorescence

Engineering Mesoporous Structure in Amorphous Carbon Boosts Potassium Storage with High Initial Coulombic Efficiency

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Nano-Micro Letters 2020年第11期12卷 39-50页

作者： Ruiting Guo Xiong Liu Bo Wen Fang Liu Jiashen Meng Peijie Wu Jinsong Wu Qi Li Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200People’s Republic of China

Amorphous carbon shows great potential as an anode material for high-performance potassium-ion batteries;however,its abundant defects or micropores generally capture K ions,thus resulting in high irreversible capacity with low initial Coulombic efficiency(ICE)and limited practical ***,pore engineering via a facile self-etching strategy is applied to achieve mesoporous carbon(meso-C)nanowires with interconnected *** and evenly distributed mesopores could provide short K^+ pathways for its rapid *** to microporous carbon with highly disordered structure,the meso-C with Zn-catalyzed short-range ordered structure enables more K^+to reversibly intercalate into the graphitic ***,the mesoC shows an increased capacity by ~100 mAh g^-1 at 0.1 A g^-1,and the capacity retention is 70.7% after 1000 cycles at 1 A g^-*** in/ex situ characterizations reveal the reversible structural changes during the charging/discharging ***,benefiting from the mesoporous structure with reduced specific surface area by 31.5 times and less defects,the meso-C generates less irreversible capacity with high ICE up to 76.7%,one of the best reported values so *** work provides a new perspective that mesopores engineering can effectively accelerate K^+ diffusion and enhance K^+ adsorption/intercalation storage.

关键词： Potassium-ion battery Mesopores engineering Storage mechanism Initial Coulombic efficiency

In-Situ Transformation and Synergistic Electrocatalysis of Asymmetric Threefold Hollow Sites in Rosebud-Like Ternary Metal Diselenide

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SSRN 2024年

作者： Wang, Shihao Liao, Lin Wu, Jinsong Tang, Haolin Zhang, Haining State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu Laboratory Guangdong Foshan528200 China International School of Materials Science and Engineering School of Materials and Microelectronics Wuhan University of Technology Hubei Wuhan430070 China Nanostructure Research Centre Wuhan University of Technology Hubei Wuhan430070 China Hubei Key Laboratory of Fuel Cell Wuhan University of Technology Hubei Wuhan430070 China

Electrochemical dynamic reconstruction substantially optimizes the catalytic properties of transition-metal-based precatalysts for the multi-electron oxygen evolution reaction (OER) by altering the surface structure, exposing more active sites, improving electron/ion transport, and enhancing stability. This research provides a comprehensive understanding of the in-situ transformation manner of a rosebud-like ternary metal diselenide precatalyst (Ni0.8Fe0.2Co0.1Se2) and the synergistic electrocatalytic mechanism of catalytic active centers through in-situ and ex-situ characterization along with DFT calculations. Benefiting from the unique morphology and abundant nanoscale planar defects within the conductive Ni0.8Fe0.2Co0.1Se2 core and the in-situ formed catalytically active (Fe, Co)-doped γ-NiOOH shell, the reconstructed catalyst achieves rapid electron/ion transport and copious active site exposure. Accordingly, the Ni0.8Fe0.2Co0.1Se2 catalyst only requires overpotentials of 101 mV and 233 mV to achieve current densities of 10 mA cm−2 and 100 mA cm−2, respectively. The overall water-splitting cell using Ni0.8Fe0.2Co0.1Se2 anode delivers current densities of 10 and 100 mA cm−2 at low cell voltages of 1.41 and 1.56 V, respectively. Furthermore, the cell demonstrates exceptional durability of 400 h at an industrial-level current density. This work sheds light on the development of efficient transition-metal-based precatalysts for OER. © 2024, The Authors. All rights reserved.

关键词： Iron compounds

High-entropy ceramics:Present status,challenges,and a look forward

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Journal of advanced Ceramics 2021年第3期10卷 385-441页

作者： Huimin XIANG Yan XING Fu-zhi DAI Hongjie WANG Lei SU Lei MIAO Guojun ZHANG Yiguang WANG Xiwei QI Lei YAO Hailong WANG Biao ZHAO Jianqiang LI Yanchun ZHOU Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China New Energy Technology Engineering Laboratory of Jiangsu Province Nanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China Guangxi Key Laboratory of Information Materials Guangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialSchool of Material Science and EngineeringGuilin University of Electronic TechnologyGuilin 541004China Institute of Functional Material College of Material Science and EngineeringDonghua UniversityShanghai 201620China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063210China College of Material Science and Engineering Shenzhen UniversityShenzhen 518060China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Henan Key Laboratory of Aeronautical Materials and Application Technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhou 450046China National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology CAS Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China

High-entropy ceramics (HECs) are solid solutions of inorganic compounds with one or more Wyckoff sites shared by equal or near-equal atomic ratios of multi-principal *** in the infant stage,the emerging of this new family of materials has brought new opportunities for material design and property *** from metals,the diversity in crystal structure and electronic structure of ceramics provides huge space for properties tuning through band structure engineering and phonon *** from strengthening,hardening,and low thermal conductivity that have already been found in high-entropy alloys,new properties like colossal dielectric constant,super ionic conductivity,severe anisotropic thermal expansion coefficient,strong electromagnetic wave absorption,etc.,have been discovered in *** a response to the rapid development in this nascent field,this article gives a comprehensive review on the structure features,theoretical methods for stability and property prediction,processing routes,novel properties,and prospective applications of *** challenges on processing,characterization,and property predictions are also ***,future directions for new material exploration,novel processing,fundamental understanding,in-depth characterization,and database assessments are given.

关键词： high-entropy ceramics(HECs) processing structure properties applications

Immunocompetent Tissue-Engineered Cartilage Scaffold by 3d Bioprinting Combined with Mechanical Stimulation

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SSRN 2024年

作者： Huang, Yantong Zhu, Jing Li, Xiaohong Poudel, Abishek Jung Li, Basen Xiao, Lin School of Biomedical Engineering Sun Yat-Sen University Shenzhen Campus Shenzhen518107 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China The University of Queensland Australian Institute for Bioengineering and Nanotechnology Centre for Advanced Imaging AIBN building 75 St LuciaQLD4072 Australia Department of Radiology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China

Tissue engineering based on 3D bioprinting holds great potential in clinical cartilage reconstruction and in vivo graft repair. Recently, numerous studies have shown that mechanical stimulation plays an important role in cartilage formation and functionality maintenance. In addition, the immune mechanism of the body plays an important role in the occurrence, development, and treatment of articular cartilage injuries and diseases. However, the effects of 3D bioprinted hydrogel scaffolds combined with mechanical stimulation and immunomodulation on cartilage repair and regeneration has been scarely reported. In this study, we designed and prepared a Gelatin methacryloyl/hyaluronic acid methacryloyl (GelMA/HAMA-based) hydrogel scaffold incorporating Mn-doped dendritic mesoporous silica nanoparticles (Mn-DMSNs) for cartilage tissue engineering. In vitro experiments showed that constant compression stimulation could significantly upregulate the cartilage gene expression. This effect could be mediated by transforming growth factors- β (TGF-β) and Ca2+, which impacted the cartilage phenotype. Moreover, Mn-DMSNs could promote the transformation of macrophages from M1 to M2, which exhibited an immunomodulatory effect. Animal trials showed that the hydrogel scaffold combined with Mn-DMSNs and constant compression could reduce the levels of inflammatory factors and promote the repair of both bone and cartilage. Overall, the hydrogel scaffold, with its superior biocompatibility and chondrogenesis potential, could serve as a promising material for cartilage defect repair. © 2024, The Authors. All rights reserved.

关键词： Cartilage

Solid-state Transformation Composite Filler: A new Strategy to Strengthen Ceramic/Metal Joint

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SSRN 2024年

作者： Nai, Xin Zhao, Shuai Wang, Peng Chen, Haiyan Wang, Pengcheng Song, Xiaoguo Vairis, Achilles Li, Wenya Shaanxi Key Laboratory of Friction Welding Technologies State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi’an710072 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin150001 China Mechanical Engineering Department University of West Attica Athens12243 Greece School of Materials Science and Engineering Singapore

Residual stress is the main hindrance to achieve a robust ceramic/metal brazed joint. In this study, yttria stabilized zirconia (YSZ) particles was fabricated into solid-state transformation composite filler, which was proposed as a new strategy to strengthen Ti3SiC2/Cu brazed joint. After detailed characterization conducted on YSZ particles and brazed joint, the abnormal expansion properties of YSZ and its strengthening brazed joint mechanism were clarified. The content of Y2O3 in YSZ had significant effects on the phase transformation of ZrO2 from tetragonal to monoclinic. When 3 mol.% Y2O3 was added, the maximum phase transformation occurred at about 500 ◦C, half of brazing temperature, during the cooling process. The phase transformation of ZrO2 effectively released residual stress in the joint, which was induced by both temperature changes and residual stress. The abnormal volume expansion during phase transformation decreased the thermal mismatch of brazed joint further to strengthen brazed joint. © 2024, The Authors. All rights reserved.

关键词： Brazing

Reduced graphene oxide/patronite composite as highly active catalyst precursors for enhancing the hydrogen desorption of MgH2

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Journal of Magnesium and Alloys 2025年

作者： Liu, Yanxia Wang, Chenxing Song, Yan Li, Zhenglong Wang, Xinqiang Qi, Fulai Chen, Jian Liu, Yongfeng Gao, Mingxia Pan, Hongge Institute of Science and Technology for New Energy Xi'an Technological University Xi'an710021 China State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and Engineering Zhejiang University Hangzhou310027 China School of Materials and Chemical Engineering Xi'an Technological University Xi'an710021 China

Although MgH2 is widely deemed to be the most promising solid-state hydrogen storage materials for the medium-high temperature fuel-cell applications expected in the near future, the high-temperature desorption and sluggish hydrogen absorption/desorption kinetics are the major challenges for its applications. Herein, reduced graphene oxide/patronite nanoparticle composite (rGO@VS4) is successfully synthesized using an ionic liquid (IL)-assisted hydrothermal method, and superior catalytic effects originated from the rGO@VS4 composite precursor towards the hydrogen storage reaction of MgH2 are systematically investigated. The VS4 reacts with MgH2 leads to the in-situ formed and uniformly scattered of metallic V and MgS during both ball-milling and the initial hydrogen desorption, and the synergic catalytic effect of metallic V and MgS facilitates the improved hydrogen desorption of MgH2. The MgH2–15 wt% rGO@VS4 composite starts releasing hydrogen at 180 °C and peaks at 220 °C, which is 145 °C and 128 °C lower than that of the Pristine MgH2, respectively. The energy required for H2 desorption from MgH2 is decreased to 63.8 kJ mol−1, 58.9 kJ mol−1 lower than that of the Pristine MgH2. Furthermore, the MgH2–15 wt% rGO@VS4 composite shows excellent cycling stability, of which reversible hydrogen capacity can stabilize at about 5.9 wt% with capacity retention of 98.2 % at 300 °C for 100 cycles. This study provides a deeper insight into metallic V and MgS to enhance the hydrogen desorption of solid-state hydrogen storage materials and also offers a perspective for the construction of high-activity catalysts for solid-state hydrogen storage materials. © 2025

关键词： Hydrogen storage

Low Viscosity and High Strength Room Temperature Cured Epoxy Structural Adhesive Based on Different Amine Curing Agents

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SSRN 2022年

作者： Bi, Shuguang Xiao, Ming Huang, Liang Rong, Huaqing Jia, Liping Ran, Jianhua Quan, Heng Zhang, Liying Tang, Jiagong Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Civil Aviation Composites Donghua University Shanghai201620 China Wuhan Rongshengjimei Technology Co. LTD Wuhan430058 China

Epoxy resin has been widely used in the field of bonding owing to its low shrinkage and high adhesive performance, especially room temperature cured epoxy resin has been paid more and more attention in the field of construction engineering. However, it is still a great challenge to ensure that the epoxy adhesive with low viscosity has a high mechanical strength during rapid curing at room temperature in some construction engineering fields, such as filling repair, bonding steel reinforcement, etc. In this work, low viscosity and high strength room temperature cured epoxy structural adhesives were fabricated by using 1,4-butanediol diglycidyl ether (BDE) with difunctional groups as active diluent to reduce the viscosity of bisphenol F epoxy resin (BPF-170) and four kinds of amines, namely 2,4,6-Tris(dimethylamiomethyl)phenol (TAP), Triethylenetetramine (TETA), N-Aminoethylpiperazine (AEP) and Isophorondiamine (IPDA) as curing agents at room temperature, following by the investigation of the effects of the four different chemical structures of curing agents on the gelation time and mechanical properties of epoxy structural adhesive. Among the four kinds of epoxy structural adhesives, the BPF-170/BDE/IPDA system using alicyclic amine has the lowest viscosity of 77 mPa·s and the longest gelation time of 95.9 min. Furthermore, the BPF-170/BDE/AEP system using piperazine amine has the best mechanical properties with the shear strength, tensile strength, compressive strength and impact strength of 23 MPa, 62.5 MPa, 112.9 MPa and 2.82 kJ/m2, respectively. In addition, the four epoxy structural adhesives have great thermal stability. The initial decomposition temperatures are all above 280 ℃ and the maximum decomposition temperatures are all above 360 ℃. These four epoxy structural adhesives with low viscosity and high strength have significant application value in the fields of construction engineering, joint filling and potting repairing, etc. © 2022, The Authors. All righ

关键词： Amines

Biopolymer passivation for high-performance perovskite solar cells by blade coating

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Journal of Energy Chemistry 2021年第3期30卷 45-52页

作者： Shudi Qiu Xin Xu Linxiang Zeng Zhen Wang Yijun Chen Culling Zhang Chaohui Li Jinlong Hu Tingting Shi Yaohua Mai Fei Guo Institute of New Energy Technology College of Information Science and TechnologyJinan UniversityGuangzhou 510632GuangdongChina Siyuan Laboratory Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials Department of Physics Jinan UniversityGuangzhou 510632GuangdongChina College of Chemistry Environmental Engineering Datong University.Datong 037009ShanxiChina National Engineering Research Center for Advanced Polymer Processing Technology Zhengzhou UniversityZhengzhou 450002HenanChina

Thin films of perovskite deposited from solution inevitably introduce large number of defects,which serve as recombination centers and are detrimental for solar cell *** many small molecules and polymers have been delicately designed to migrate defects of perovskite films,exploiting credible passivation agents based on natural materials would offer an alternative ***,an ecofriendly and cost-effective biomaterial,ploy-L-lysine(PLL),is identified to effectively passivate the defects of perovskite films prepared by *** is found that incorporation of a small amount(2.5 mg mL^(-1))of PLL significantly boosts the performance of printed devices,yielding a high efficiency of 19.45% with an increase in open-circuit voltage by up to 100 *** functional theory calculations combined with X-ray photoelectron spectroscopy reveal that the functional groups(-NH2,-COOH)of PLL effectively migrate the Pb-I antisite defects via Pb-N coordination and suppress the formation of metallic Pb in the blade-coated perovskite *** work suggests a viable avenue to exploit passivation agents from natural materials for preparation of high-quality perovskite layers for optoelectronic applications.

关键词： Perovskite solar cells Blade coating Biopolymer passivation Density functional theory