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The photocatalytic properties of hollow (GaN)1-x(ZnO)x composite nanofibers synthesized by electrospinning

Applied surface science 2017年 396卷 888-896页

作者： Wang, Ding Zhang, Minglu Zhuang, Huaijuan Chen, Xu Wang, Xianying Zheng, Xuejun Yang, Junhe College of Materials Science and Engineering University of Shanghai for Science & Technology Shanghai200093 China School of Mechanical Engineering Xiangtan University Xiangtan411105 China Key Laboratory of Welding Robot and Application Technology of Hunan Province Xiangtan University Xiangtan411105 China

(GaN)1-x(ZnO)x composite nanofibers with hollow structure were prepared by initial electrospinning, and the subsequent calcination and nitridation. The structure and morphology characteristics of samples were investigated by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS) and transmission electron microscopy (TEM). The characterization results showed the phase transition from ZnGa2O4 to (GaN)1-x(ZnO)x solid-solution under ammonia atmosphere. The preparation conditions were explored and the optimum nitridation temperature and holding time are 750 °C and 2 h, respectively. The photocatalytic properties of (GaN)1-x(ZnO)x with different Ga:Zn atomic ratios were investigated by degrading Rhodamine B under the visible light irradiation. The photocatalytic activity sequence is (GaN)1−x(ZnO)x (Ga:Zn = 1:2) > (GaN)1−x(ZnO)x (Ga:Zn = 1:3) > ZnO nanofibers > (GaN)1−x(ZnO)x (Ga:Zn = 1:4) > (GaN)1−x(ZnO)x (Ga:Zn = 1:1). The photocatalytic mechanism of the (GaN)1−x(ZnO)x hollow nanofibers was further studied by UV–vis diffuse reflectance spectra. The excellent photocatalytic performance of (GaN)1−x(ZnO)x hollow nanofibers was attributed to the narrow band gap and high surface area of porous nanofibers with hollow structure. © 2016

关键词： Zinc oxide

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Precise nanomedicine for intelligent therapy of cancer

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science China Chemistry 2018年第12期61卷 1503-1552页

作者： Huabing Chen Zhanjun Gu Hongwei An Chunying Chen Jie Chen Ran Cui Siqin Chen Weihai Chen Xuesi Chen Xiaoyuan Chen Zhuo Chen Baoquan Ding Qian Dong Qin Fan Ting Fu Dayong Hou Qiao Jiang Hengte Ke Xiqun Jiang Gang Liu Suping Li Tianyu Li Zhuang Liu Guangjun Nie Muhammad Ovais Daiwen Pang Nasha Qiu Youqing Shen Huayu Tian Chao Wang Hao Wang Ziqi Wang Huaping Xu Jiang-Fei Xu Xiangliang Yang Shuang Zhu Xianchuang Zheng Xianzheng Zhang Yanbing Zhao Weihong Tan Xi Zhang Yuliang Zhao State Key Laboratoiy of Radiation Medicine and Protection Jiangsu Key Laboratoiy of Neuropsychiatric Diseases College of Pharmaceutical Sciences Soochow University Suzhou 215123 China Key Laboratoiy of Biomedical Polymers of Ministry of Education Department of Chemistiy Wuhan University Wuhan 430072 China Laboratoiy of Molecular Imaging and Nanomedicine National Institute of Biomedical Imaging and Bioengineering National Institutes of Health Bethesda MD 20892 USA Molecular Science and Biomedicine Laboratoiy State Key Laboratory of Chemo/Bio-Sensing and Chemometrics College of Chemistiy and Chemical Engineering Aptamer Engineering Center of Hunan Province Hunan University Changsha 410082 China Jiangsu Key Laboratoiy for Carbon-Based Functional Materials & Devices Institute of Functional Nano & Soft Materials Soochow University Suzhou 215123 China Department of Polymer Science and Engineering College cf Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics & Center for Molecular Imaging and Translational Medicine School of Public Health Xiamen University Xiamen 361102 China Department of Chemistiy Tsinghua University Beijing 100084 China National Engineering Research Center for Nanomedicine College of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 China Department of Chemistiy and Department of Physiology and Functional Genomics Center for Research at Bio/nano Interface Health Cancer Center UF Genetics Institute and McKnight Brain Institute University of Florida Gainesville FL 32611-7200 USA institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China CAS Key Laboratoiy for Biomedical Effects of Nanomaterials and Nanosafety CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology of China Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China Key Labo

Precise nanomedicine has been extensively explored for efficient cancer imaging and targeted cancer therapy, as evidenced by a few breakthroughs in their preclinical and clinical explorations. Here, we demonstrate the recent advances of intelligent cancer nanomedicine, and discuss the comprehensive understanding of their structure-function relationship for smart and efficient cancer nanomedicine including various imaging and therapeutic applications, as well as nanotoxicity. In particular, a few emerging strategies that have advanced cancer nanomedicine are also highlighted as the emerging focus such as tumor imprisonment, supramolecular chemotherapy, and DNA nanorobot. The challenge and outlook of some scientific and engineering issues are also discussed in future development. We wish to highlight these new progress of precise nanomedicine with the ultimate goal to inspire more successful explorations of intelligent nanoparticles for future clinical translations.

关键词： nanomedicine nanoparticles cancer therapy cancer imaging intelligent therapy

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Microstructure and properties of co-continuous(β-TCP+MgO)/Zn-Mg composite fabricated by suction exsorption for biomedical applications

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Transactions of Nonferrous Metals Society of China 2017年第9期27卷 1996-2006页

作者： Xiang WANG Qi-dong NIE Xu-liang MA Jin-long FAN Ting-liang YAN Xin-lin LI Institute of Surface/Interface Science and Technology Key Laboratory of Superlight Material and Surface Technology Ministry of Education Harbin Engineering University Harbin 150001 China School of Materials Science and Engineering Harbin University of Science and Technology Harbin 150080 China

The biomedical co-continuous(β-TCP+MgO)/Zn-Mg composite was fabricated by infiltrating Zn-Mg alloy into porousβ-TCP+MgO using suction exsorption *** microstructure,mechanical properties and corrosion behaviors of the composite were evaluated by means of scanning electron microscopy(SEM),X-ray diffraction(XRD),mechanical testing,electrochemical and immersion *** was found that the molten Zn-Mg alloy had infiltrated not only into the pores but also into the struts of the porousβ-TCP+MgO scaffold to form a compact *** Zn-Mg alloy contacted to theβ-TCP+MgO scaffold closely,and no reaction layer can be found between the alloy and the *** compressive strength of the composite was as high as244MPa,which was about1000times higher than that of the original porousβ-TCP+MgO scaffold and2/3of the strength of the Zn-Mg bulk *** electrochemical and immersion tests in simulated body fluid(SBF)solution indicated that the corrosion resistance of the composite was better than that of the Zn-Mg bulk *** corrosion products on the composite surface were mainly Zn(OH)*** mechanical and corrosion properties indicated that the(β-TCP+MgO)/Zn?Mg composite fabricated by suction exsorption would be a very promising candidate for bone substitute.

关键词： (β-TCP+MgO)/Zn-Mg composite microstructure mechanical properties corrosion behavior suction exsorption

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Universal Sub-Nanoreactor Strategy for Synthesis of Yolk-Shell MoS2Supported Single Atom Electrocatalysts toward Robust Hydrogen Evolution Reaction

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Angewandte Chemie 2023年第40期135卷

作者： Feilong Gong Yuheng Liu Yang Zhao Prof. Wei Liu Prof. Guang Zeng Prof. Guoqing Wang Prof. Yonghui Zhang Lihua Gong Prof. Jian Liu Key Laboratory of Surface and Interface Science and Technology of Henan Province College of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou Henan 450001 P. R. China Contribution: Conceptualization (equal) Formal analysis (equal) Funding acquisition (lead) Investigation (lead) Visualization (equal) Writing - original draft (lead) Contribution: Data curation (lead) Formal analysis (equal) Investigation (equal) Validation (equal) Visualization (equal) State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian Liaoning 116023 P. R. China Contribution: Data curation (equal) Formal analysis (equal) Resources (equal) Validation (equal) Visualization (equal) Contribution: Data curation (equal) Formal analysis (equal) Investigation (equal) Contribution: Data curation (equal) Methodology (equal) Software (equal) Validation (equal) Contribution: Formal analysis (equal) Software (equal) Writing - review & editing (equal) Contribution: Conceptualization (equal) Data curation (equal) Formal analysis (lead) Software (lead) Writing - review & editing (equal) DICP-Surrey Joint Centre for Future Materials Department of Chemical and Process Engineering and Advanced Technology Institute of University of Surrey Guildford Surrey GU2 7XH UK College of Chemistry and Chemical Engineering Inner Mongolia University Hohhot Inner Mongolia 010021 P. R. China Contribution: Conceptualization (lead) Formal analysis (equal) Funding acquisition (equal) Project administration (lead) Supervision (lead) Writing - review & editing (lead)

The coordination structure determines the electrocatalytic performances of single atom catalysts (SACs), while it remains a challenge to precisely regulate their spatial location and coordination environment. Herein, we report a universal sub-nanoreactor strategy for synthesis of yolk-shell MoS 2 supported single atom electrocatalysts with dual-anchored microenvironment of vacancy-enriched MoS 2 and intercalation carbon toward robust hydrogen-evolution reaction. Theoretical calculations reveal that the “E-Lock” and “E-Channel” are conducive to stabilize and activate metal single atoms. A group of SACs is subsequently produced with the assistance of sulfur vacancy and intercalation carbon in the yolk-shell sub-nanoreactor. The optimized C−Co−MoS 2 yields the lowest overpotential (η 10 =17 mV) compared with previously reported MoS 2 -based electrocatalysts to date, and also affords a 5–9 fold improvement in activity even comparing with those as-prepared single-anchored analogues. Theoretical results and in situ characterizations unveil its active center and durability. This work provides a universal pathway to design efficient catalysts for electro-refinery.

关键词： Electrocatalyst Nanostructures Sub-Nanoreactor Universal Strategy Water Splitting

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Microstructure evolution during heat treatment of Mg-Gd-Y-Zn-Zr alloy and its low-cycle fatigue behavior at 573K

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Transactions of Nonferrous Metals Society of China 2017年第5期27卷 1026-1035页

作者： Luo-yi WU Hao-tian LI Zhong YANG College of Materials Science and Engineering Hunan University Changsha 410082 China Hunan Province Key Laboratory for Spray Deposition Technology and Application Hunan University Changsha 410082 China College of Materials Science and Engineering Xi’an Technological University Xi’an 710032 China

In as-cast Mg?2.1Gd?1.1Y?0.82Zn?0.11Zr(mole fraction,%)alloy,lamellar microstructures that extend from grain boundaries to the interior ofα-Mg grains are identified as clusters ofγ′using a scanning transmission electron microscope equipped with a high-angle annular dark-field *** a total strain-controlled low-cyclic loading at573K,the mechanical response and failure mechanism of Mg?2.1Gd?1.1Y?0.82Zn?0.11Zr alloy(T6peak-aging heat treatment)were *** show that the alloy exhibits cyclic softening response at diverse total strain amplitudes *** experimental observations using scanning electron microscopy show that the micro-cracks initiate preferentially at the interface between long-period stacking order structures andα-Mg matrix and extend along the basal plane ofα-*** massive long-period stacking order structures distributed at grain boundaries impede the transgranular propagation of cracks.

关键词： Mg.Gd.Y.Zn.Zr alloy long-period stacking order structure low-cycle fatigue at high temperature crack initiation and propagation

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Layered double hydroxides with larger interlayer distance for enhanced pseudocapacitance

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science China. materials 2018年第2期61卷 263-272页

作者： Xiao Yuanhua Su Dangcheng Wang Xuezhao Wu Shide Zhou Liming Fang Shaoming Li Feng Zhengzhou University of Light Industry Henan Key Laboratory of Surface and Interface Science and Technology Zhengzhou 450002 the Institute of Metal Research Chinese Academy of Sciences Shenyang National Laboratory for Materials Science Shenyang 110016

The interlayer space of the layered materials is not always the electrochemical active area for contributing to the pseudocapacitive process. To our knowledge, few efforts have been devoted to investigating the effect of interlayer distance of layered double hydroxides (LDHs) on pseudocapacitors. Here, we obtained the CoAl-LDH with different interlayer distance via the reaction in aqueous media hydro-thermally. Electrochemical characterization reveals that the CoAl(DS_(dodecyl sulfate))-LDHs with an interlayer distance of 2.58 nm can deliver higher specific capacitance of 1481.7 F g~(-1) than CoA1(SO_4~(2-))-LDH (0.87 nm, 1252.7 F g~(-1)) and CoAl (CO_3~(2-))-LDH (0.76 nm, 1149.2 F g~(-1)) at a discharge current density of 1 A g~(-1). An asymmetric supercapacitor with the CoAl(DS~-)-LDHs||activated carbon also shows a better electrochemical performance, including a high energy density of 54.2 W h kg~(-1) at a power density of 0.9 kW kg~(-1) and a longterm stability, in comparison with CoA1(SO_4~(2-))-LDH and CoAl (CO_3~(2-))-LDH||activated carbon.

关键词： layered double hydroxides interlayer distance hydrothermal asymmetric supercapacitors

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A Nanosheet Array of Cu2Se Intercalation Compound with Expanded Interlayer Space for Sodium Ion Storage

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Advanced Energy materials 2020年第25期10卷

作者： Yuanhua Xiao Xiaobing Zhao Xuezhao Wang Dangcheng Su Shuo Bai Wei Chen Shaoming Fang Liming Zhou Hui‐Ming Cheng Feng Li Key Laboratory of Surface and Interface Science and Technology Zhengzhou University of Light Industry Zhengzhou 450002 China School of Chemical Engineering and Energy Zhengzhou University Zhengzhou Henan Province 450052 China Shenyang National Laboratory for Material Sciences Institute of Metal Research Chinese Academy of Science Shenyang 110016 China Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City Fuzhou 350207 China Shenzhen Geim Graphene Center Tsinghua‐Berkeley Shenzhen Institute Tsinghua University Shenzhen 518055 China

Intercalation chemistry/engineering has been widely investigated in the development of electrochemical energy storage. Graphite, as an old intercalation host, is receiving vigorous attention again via a new halogen intercalation. Whereas, exploiting new intercalation hosts and optimizing the intercalation effect still remains a great challenge. This study fabricates a Cu 2 Se intercalation compound showing expanded interlayer space and nanosheet array features by using a green growth approach, in which cetyltrimethyl ammonium bromide (CTAB) is inserted into Cu 2 Se at an ambient temperature. When acting as an electrode material for sodium‐ion batteries, the Cu 2 Se–CTAB nanosheet arrays exhibit excellent discharge capacity and rate capability (426.0 mAh g −1 at 0.1 A g −1 and 238.1 mAh g −1 at 30 A g −1 ), as well as high capacity retention of ≈90% at 20 A g −1 after 6500 cycles. Benefiting from the porous array architecture, the transport of electrolytes is facilitated on the surface of Cu 2 Se nanosheets. In particular, the CTAB intercalated in the interlayer space of Cu 2 Se can increase its buffer space, stabilize the polyselenide shuttle, and prevent the fast growth of Cu nanoparticles during its electrochemical process.

关键词： Cu2Se intercalation compounds nanoarrays sodium ion batteries

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Sodium‐Ion Batteries: A Nanosheet Array of Cu2Se Intercalation Compound with Expanded Interlayer Space for Sodium Ion Storage (Adv. Energy Mater. 25/2020)

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Advanced Energy materials 2020年第25期10卷

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Acoustic emission assessment of interface cracking in thermal barrier coatings

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Acta Mechanica Sinica 2016年第2期32卷 342-348页

作者： Li Yang Zhi-Chun Zhong Yi-Chun Zhou Wang Zhu Zhi-Biao Zhang Can-Ying Cai Chun-Sheng Lu Key Laboratory of Key Film Materials & Application for Equipment (Hunan Province) School of Materials Science and EngineeringXiangtan University Key Laboratory of Low Dimensional Materials & Application Technology (Ministry of Education) School of Materials Science and EngineeringXiangtan University Department of Mechanical Engineering Curtin University

In this paper,acoustic emission（AE） and digital image correlation methods were applied to monitor interface cracking in thermal barrier coatings under *** interface failure process can be identifie via its AE features,including buckling,delamination incubation and *** to the Fourier transformation of AE signals,there arefourdifferentfailuremodes：surfaceverticalcracks,opening and sliding interface cracks,and substrate *** characteristic frequency of AE signals from surface vertical cracks is 0.21 MHz,whilst that of the two types of interface cracks are 0.43 and 0.29 MHz,*** energy released of the two types of interface cracks are 0.43 and 0.29 MHz,*** on the energy released from cracking and the AE signals,a relationship is established between the interface crack length and AE parameters,which is in good agreement with experimental results.

关键词： Thermal barrier coatings Acoustic emission interface cracking Crack type Quantitative analysis

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surface Modification of PHBV Tissue Engineering Nanofibrous Scaffolds with Hyaluronic Acid

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hunan Daxue Xuebao/Journal of hunan University Natural sciences 2017年第6期44卷 87-95页

作者： Liu, Hairong Huang, Jiying Zhou, Zheng Hu, Yibing Li, Yongsheng Zou, Peng Dai, Yao College of Materials Science and Engineering Hunan University Changsha410082 China College of Biology Hunan University Changsha410082 China Hunan Province Key Laboratory for Spray Deposition Technology and Application Hunan University Changsha410082 China Hunan Academy of Chinese Medicine Changsha410013 China

surface properties of tissue engineering scaffold play important roles in cell adhesion and other biological processes such as cell proliferation, differentiation. In this study, the surface modification of Poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was performed in order to improve the biological activity of material surface. PHBV nanofibrous scaffold was firstly made by electrostatic spinning method, introducing free amino groups in the PHBV surface through 1, 6-hexanediamine, which provided reaction sites for the further immobilization of hyaluronic acid (HA) macromolecules. The morphology observed by SEM showed that PHBV nanofibrous scaffolds prepared by electrostatic spinning method have smooth surfaces without obvious beads defects and their fiber diameters uniformly distribute. FTIR analysis proved that 1, 6-hexanediamine and hyaluronic acid modified PHBV fibrous scaffolds were successfully achieved. The ninhydrin determination results showed that the surface amine group density, which increased with the extending of aminolysis time, reached its maximum at 50 minutes. Furthermore, there is no significant difference on the morphology of the scaffolds before and after modification by statistic comparison. The water contact angle significantly decreased after the immobilization of hyaluronic acid, indicating that the hydrophilicity was obviously improved after surface modification with the hydrophilic natural biological macromolecules. The Alamar Blue assay manifested that hyaluronic acid modified PHBV nanofibrous scaffolds could significantly promote the chondrocytes proliferation in vitro. Therefore, the hyaluronic acid modified PHBV nanofibrous scaffolds are potential for application in cartilage tissue engineering. © 2017, Editorial Department of Journal of hunan University. All right reserved.

关键词： Biocompatibility

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