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A multi-functional MgF_(2)/polydopamine/hyaluronan-astaxanthin coating on the biodegradable ZE21B alloy with better corrosion resistance and biocompatibility for cardiovascular application

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Journal of Magnesium and Alloys 2024年第3期12卷 1102-1116页

作者： Yachen Hou Xueqi Zhang Jingan Li Liguo Wang Shaokang Guan School of materials Science and Engineering and henan key laboratory of Advanced Magnesium Alloy and key laboratory of materials Processing and Mold technology(Ministry of Education) Zhengzhou UniversityZhengzhou 450001China

The cardiovascular diseases(CVD)continue to be the major threat to global public health over the years,while one of the effective methods to treat CVD is stent intervention.Biomedical magnesium(Mg)alloys have great potential applications in cardiovascular stents benefit from their excellent biodegradability and absorbability.However,excessive degradation rate and the delayed surface endothelialization still limit their further application.In this study,we modified a Mg-Zn-Y-Nd alloy(ZE21B)by preparing MgF_(2) as the corrosion resistance layer,the dopamine polymer film(PDA)as the bonding layer,and hyaluronic acid(HA)loaded astaxanthin(ASTA)as an important layer to directing the cardiovascular cells fate.The electrochemical test results showed that the MgF_(2)/PDA/HA-ASTA coating improved the corrosion resistance of ZE21B.The cytocompatibility experiments also demonstrated that this novel composite coating also selectively promoted endothelial cells proliferation,inhibited hyperproliferation of smooth muscle cells and adhesion of macrophages.Compared with the HAloaded rapamycin(RAPA)coating,our MgF_(2)/PDA/HA-ASTA coating showed better blood compatibility and cytocompatibility,indicating stronger multi-functions for the ZE21B alloy on cardiovascular application.

关键词： Biodegradable ZE21B alloy Reendothelialization Surface modification Hyaluronic acid Astaxanthin.

Electromagnetic wave absorbing ceramics composites made of polymer-derived SiC with BN@CNTs pyrolyzed higher than 1200℃

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Journal of materials Science & technology 2023年第36期167卷 213-227页

作者： Bin Ren Yumeng Deng Yujun Jia Xiaopeng Wu Guanghui Feng Qian Wang Hejun Li State key laboratory of Solidification Processing Shaanxi Key Laboratory of Fiber Reinforced Light Composite MaterialsNorthwestern Polytechnical UniversityXi’an 710072China henan key laboratory of High Performance Carbon Fiber Reinforced Composites Institute of Carbon Matrix CompositesHenan Academy of SciencesZhengzhou 450046China

Polymer-derived ceramics(PDCs)pyrolyzed at high temperatures are promising electromagnetic wave(EMW)absorption materials for aerodynamically heated parts of aircraft under harsh environments.Nev-ertheless,high-temperature pyrolysis results in a significant increase of electrical and dielectric proper-ties of the ceramics,causing extensive reflection of EMW.To address this challenge,boron nitride-coated carbon nanotubes(BN@CNTs)were fabricated and introduced into polymer-derived SiC(PDC-SiC)by py-rolyzing its precursor higher than 1200℃to form SiC-BN@CNT ceramic composites.The fabricated com-posites with 3 wt.%BN@CNTs pyrolyzed at 1200℃have an effective absorption bandwidth(EAB)of 4.2 GHz(8.2-12.4 GHz)at a thickness of 3.4 mm and the minimum reflection loss(RL min)of-57.20 dB.The ultra-broad EAB of 12.62 GHz(5.38-18 GHz)is obtained by simulation through periodic structure design-ing.The RL of the metamaterials was also measured using an arch testing method at a frequency range of 2-18 GHz and an EAB of 11.52 GHz(6.48-18 GHz)is obtained.The excellent absorption is attributed to the BN layer that limits the electrical conduction of the ceramic composites while retaining the high loss of CNTs.The introduction of BN@CNTs causes the refinement of SiC grains,which provides plenty of interfaces and enhances the interface polarization loss.This work successfully solves the problem that PDCs pyrolyzed at elevated temperatures cannot be used as EMW absorption materials by applying BN coating on CNTs served as absorbers for PDC-SiC.The results of this work greatly broaden the application scope of the PDC systems for EMW absorption.

关键词： Electromagnetic wave absorption Polymer derived ceramic BN@CNTs Harsh environment High pyrolysis temperature

二维硒化铅的范德瓦尔斯外延生长及其高性能异质结器件

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Science Bulletin 2022年第16期67卷 1659-1668,M0004页

作者：姜健程瑞清尹蕾文耀王皓翟保兴刘传胜单崇新何军 key laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physical and TechnologyWuhan UniversityWuhan 430072China henan key laboratory of Diamond Optoelectronic materials and Devices Key Laboratory of Material PhysicsMinistry of EducationSchool of PhysicsZhengzhou UniversityZhengzhou 450052China

近年,基于二维材料及其异质结的光电探测器因其优异的光电特性受到广泛关注.但是,大多数二维材料的光捕获能力有限,从而限制了它们的光电转换效率.因此,合成具有高吸收系数的二维半导体材料和构筑高性能的异质结器件仍是一个难题.本文... 详细信息

近年,基于二维材料及其异质结的光电探测器因其优异的光电特性受到广泛关注.但是,大多数二维材料的光捕获能力有限,从而限制了它们的光电转换效率.因此,合成具有高吸收系数的二维半导体材料和构筑高性能的异质结器件仍是一个难题.本文利用范德瓦尔斯外延技术在云母衬底上成功合成了非层状硒化铅纳米片.基于硒化铅的光电探测器展现了优异的光电性能.更重要的是,基于硒化铅和二硫化钼的范德华异质结器件不仅展现出10~6的高整流比,还具有~3×10^(3) A/W和~7×10^(12) Jones的高响应度和探测率.

关键词：范德瓦尔斯光电探测器硒化铅外延技术光电转换效率二维材料外延生长探测率

Rapid and reversible Na deposition onto Al nanosheet arrays

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Journal of Energy Chemistry 2022年第11期31卷 1-7,I0002页

作者： Fang Tang Rongqing Xia Dong Chen Yu Yao Lin Liu Yuezhan Feng Xianhong Rui Yan Yu School of materials and Energy Guangdong University of TechnologyGuangzhou 510006GuangdongChina Hefei National Research Center for Physical Sciences at the Microscale Department of Materials Science and EngineeringNational Synchrotron Radiation LaboratoryCAS Key Laboratory of Materials for Energy ConversionUniversity of Science and Technology of ChinaHefei 230026AnhuiChina key laboratory of materials Processing and Mold(Ministry of Education) Zhengzhou UniversityZhengzhou 450002HenanChina

Sodium metal battery(SMB)is regarded as a promising candidate for next-generation high-energy battery due to high theoretical capacity and abundant natural resources.However,the growth of sodium dendrites and large volume expansion during the processes of sodium plating and stripping seriously restrict the practical application of SMBs.Here,a three-dimensional skeleton of aluminum nanosheet arrays(Al NSARs)is constructed by a facile etching approach to achieve rapid and reversible Na plating/stripping.The Al NSARs with large geometric specific surface and plentiful cavities can provide rich active nucleation sites,reduce local current density and accommodate Na volume change,which lead to uniform deposition of sodium with dendrite-free morphology.As a result,Na plating/stripping on Al NSARs can stably operate over 650 cycles at 2 mA cm^(-2)/2 mAh cm^(-2)with average Coulombic efficiency(CE)of 100.0%and low potential polarization of 27 mV.Moreover,the full cell of Na_(s)V_(2)(PO_(4))_(3)||Al NSARs@Na can run for over 1800 cycles at a high rate of 20C.These superior properties,combined with relatively low cost and weight of Al,enable our AlNSARs to begreat prospect for practical applications.

关键词： Sodiummetal battery Sodiummetal anode Three-dimensional skeleton Al nanosheet arrays Dendrite-freebehavior

Structure-dependent electromagnetic wave absorbing properties of bowl-like and honeycomb TiO_(2)/CNT composites

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Journal of materials Science & technology 2022年第14期109卷 105-113页

作者： Hua Jian Qinrui Du Qiaoqiao Men Li Guan Ruosong Li Bingbing Fan Xin Zhang Xiaoqin Guo Biao Zhao Rui Zhang Henan Key Laboratory of Aeronautical Materials and Application Technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhou 450046China School of Chemical Engineering Northwest UniversityXi’an 710069China Zhejiang Provincial key laboratory of Advanced Chemical Engineering Manufacture technology College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China School of materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Zhengzhou Research Institute for Abrasives&Grinding Co. Ltd.Zhengzhou 450001China School of Material Science and Engineering Luoyang Institute of Science and TechnologyLuoyang 471023China

materials that can efficiently absorb electromagnetic waves(EMWs)are required to deal with electromagnetic pollution.Structure design appears to be an efficient way to improve the EMW-absorption performance of such materials,particularly when adjustment of the constitution or mixing ratio is limited.In this study,bowl-like and honeycomb titanium dioxide/carbon nanotube(TiO_(2)/CNT)composites with different CNT contents were fabricated using the methods of hierarchical and mixing vacuum-assisted filtration,respectively.Compared to the honeycomb structure,the bowl-like structure simultaneously facilitated greater interfacial polarization and conduction loss in favor of dielectric polarization,and augmented multiple reflections.The high porosity of the honeycomb structure was conducive to optimizing the impedance matching characteristics.The bowl-like TiO_(2)/CNT composite exhibited a minimum reflection loss(RL_(min))of-38.6 dB(1.5 mm)with a wide effective absorption band(EAB;materials.

关键词： Bowl-like structure Honeycomb structure TiO_(2)/CNT composite Electromagnetic wave absorption

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一种原位还原策略用于构筑无枝晶锌负极

Science China materials 2023年第5期66卷 1757-1766页

作者：周梦奇吴周王锐孙国强臧双全 henan key laboratory of Crystalline Molecular Functional materials Green Catalysis CenterCollege of ChemistryZhengzhou UniversityZhengzhou 450001China

结合了三维结构和亲锌物种的集流体构筑策略被认为是构建高稳定锌金属负极的有效方法.然而,高昂的成本和复杂的制备工艺阻碍了其实际应用.本文通过在有均匀Cu^(2+)锚定的碳布集流体(ACC-600@Cu^(2+))上沉积锌,合理设计了一种稳定的三维... 详细信息

结合了三维结构和亲锌物种的集流体构筑策略被认为是构建高稳定锌金属负极的有效方法.然而,高昂的成本和复杂的制备工艺阻碍了其实际应用.本文通过在有均匀Cu^(2+)锚定的碳布集流体(ACC-600@Cu^(2+))上沉积锌,合理设计了一种稳定的三维锌金属复合阳极(Zn@ACC-600@Cu^(2+)).在锌成核过程中,Cu^(2+)原位还原为金属Cu,然后随着锌的进一步沉积,碳布表面逐渐形成均匀的亲锌的Cu-Zn合金界面层.密度泛函理论计算和实验观察表明,Cu-Zn合金界面不仅可以作为锌离子的亲锌沉积点,而且可以提高导电率,使电场和锌离子通量均匀化.因此,ACC-600@Cu^(2+)集流体可以实现高的镀锌/剥离可逆性,并在15.8 mV的极化电压下稳定循环410 h以上.作为概念验证,我们组装的Zn@ACC-600@Cu^(2+)‖MnO_(2)全电池具有良好的电池倍率性能,与原始碳布相比,其比容量显著提高至110 mA h g^(-1).本文提出的原位还原策略为三维锌金属复合负极的设计提供了一种简便且低成本的方法,促进了无枝晶和高稳定锌金属电池的发展.

关键词： in situ reduction strategy zincophilic species 3D composite Zn anode Cu-Zn alloy

Achieving long-cycling sodium-ion full cells in ether-based electrolyte with vinylene carbonate additive

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Journal of Energy Chemistry 2021年第6期30卷 650-655,I0016页

作者： Juan Shi Lina Ding Yanhua Wan Liwei Mi Linjie Chen Dan Yang Yuxiong Hu Weihua Chen Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450001HenanChina henan key laboratory of Functional Salt materials Center of Advanced Materials ResearchZhongyuan University of TechnologyZhengzhou 450007HenanChina College of Pharmacy Zhengzhou UniversityZhengzhou 450001HenanChina

application of sodium-ion batteries is suppressed due to the lack of appropriate electrolytes matching cathode and anode simultaneously.Ether-based electrolytes,preference of anode materials,cannot match with high-potential cathodes failing to apply in full cells.Herein,vinylene carbonate(VC)as an additive into NaCF_(3) SO_(3)-Diglyme(DGM)could make sodium-ion full cells applicable without preactivation of cathode and anode.The assembled FeS@C||Na3 V2(PO_(4))_(3)@C full cell with this electrolyte exhibits long term cycling stability and high capacity retention.The deduced reason is additive VC,whose HOMO level value is close to that of DGM,not only change the solvent sheath structure of Na^(+),but also is synergistically oxidized with DGM to form integrity and consecutive cathode electrolyte interphase on Na3 V2(PO_(4))_(3)@C cathode,which could effectively improve the oxidative stability of electrolyte and prevent the electrolyte decomposition.This work displays a new way to optimize the sodium-ion full cell seasily with bright practical application potential.

关键词： Cathode electrolyte interphase Sodium-ion batteries Full cell Ether-based electrolyte Vinylene carbonate DFT calculation

Thermally Conductive Poly(lactic acid) Composites with Superior Electromagnetic Shielding Performances via 3D Printing technology

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Chinese Journal of Polymer Science 2022年第3期40卷 248-255,I0006页

作者： Teng-Bo Ma Hao Ma Kun-Peng Ruan Xue-Tao Shi Hua Qiu Sheng-Yuan Gao Jun-Wei Gu Shaanxi key laboratory of Macromolecular Science and technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China School of materials Science and Engineering Henan University of Science and TechnologyLuoyang 471023China

This work proposes a facile fabrication strategy for thermally conductive graphite nanosheets/poly(lactic acid) sheets with ordered GNPs(o-GNPs/PLA) via fused deposition modeling(FDM) 3 D printing technology.Further combinations of o-GNPs/PLA with Ti_(3) C_(2) T_(x) films prepared by vacuum-assisted filtration were carried out by "layer-by-layer stacking-hot pressing" to be the thermally conductive Ti_(3) C_(2) T_(x)/(oGNPs/PLA) composites with superior electromagnetic interference shielding effectiveness(EMI SE).When the content of GNPs was 18.60 wt%and 4 layers of Ti_(3) C_(2) T_(x)(6.98 wt%) films were embedded,the in-plane thermal conductivity coefficient(λ_(Ⅱ)) and EMI SE(EMI SE_(Ⅱ)) values of the thermally conductive Ti_(3) C_(2) T_(x)/(o-GNPs/P LA) composites significantly increa sed to 3.44 W·m^(-1)·K^(-1) and 65 d B(3.00 mm),increased by 1223.1% and2066.7%,respectively,compared with λ_(Ⅱ)(0.26 W·m^(-1)·K^(-1)) and EMI SE_(Ⅱ)(3 d B) of neat PLA matrix.This work offers a novel and easily route for designing and manufacturing highly thermally conductive polymer composites with superior EMI SE for broader application.

关键词： Polymer-matrix composites(PMCs) Ti_(3)C_(2)T_(x) 3D printing Thermal conductivity Electromagnetic interference(EMI)

Novel hierarchical structure of MoS_(2)/TiO_(2)/Ti_(3)C_(2)T_(x) composites for dramatically enhanced electromagnetic absorbing properties

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Journal of Advanced Ceramics 2021年第5期10卷 1042-1051页

作者： Heng DU Qipeng ZHANG Biao ZHAO Frank MARKEN Qiancheng GAO Hongxia LU Li GUAN Hailong WANG Gang SHAO Hongliang XU Rui ZHANG Bingbing FAN School of materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China hkey laboratory of Functional Molecular Solids Ministry of EducationAnhui Normal UniversityWuhu 241000China henan key L abomtory of aeronautical materials and application technology Zhengzhou University of AeronauticsZhengzhou 450046China Department of Chemistry University of BathClaverton DownBath BA27AYUK School of materials Science and Engineering L uoyang Institute of Science and TechnologyLuoyang 471023China

In order to prevent the microwave leakage and mutual interference,more and more microwave absorbing devices are added into the design of electronic products to ensure its routine operation.In this work,we have successfully prepared MoS_(2)/TiO_(2)/Ti_(3)C_(2)T_(x) hierarchical composites by one-pot hydrothermal method and focused on the relationship between structures and electromagnetic absorbing properties.Supported by comprehensive characterizations,M0S_(2) nanosheets were proved to be anchored on the surface and interlayer of Ti_(3)C_(2)T_(x) through a hydrothermal process.Additionally,TiO_(2) nanoparticles were obtained in situ.Due to these hierarchical structures,the MoS_(2)/TiO_(2)/Ti_(3)C_(2)T_(x) composites showed greatly enhanced microwave absorbing performance.The MoS_(2)/TiO_(2)/Ti_(3)C_(2)T_(x) composites exhibit a maximum reflection loss value of -33.5 dB at 10.24 GHz and the effective absorption bandwidth covers 3.1GHz(13.9-17 GHz)at the thickness of 1.0 mm,implying the features of wide frequency and light weight.This work in the hierarchical structure of MoS_(2)/TiO_(2)/Ti_(3)C_(2)T_(x) composites opens a promising door to the exploration of constructing extraordinary electromagnetic wave absorbents.

关键词： MoS_(2)/TiO_(2)/Ti_(3)C_(2)T_(x)hierarchical hybrids microwave absorbing properties dielectric loss