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Journal of Energy Chemistry 2019年第2期28卷 65-71页

作者： Xiaoni Zhang Jianjian Yi Hanxiang Chen Mao Mao Liang Liu Xiaojie She Haiyan Ji Xiangyang Wu Shouqi Yuan Hui Xu Huaming Li School of the Environment and Safety Engineering Institute for Energy ResearchJiangsu University

The suppression of the recombination of electrons and holes(e–h) and the enhancement of the light absorption of semiconductors are two key points toward efficient photocatalytic ***,we report a few-layer g-C_3N_4/α-MoO_3 nanoneedles(flg-C_3N_4/α-MoO_3 NNs) all-solid-state Z-scheme mechanism photocatalyst synthesized via a typical hydrothermal method in a controlled *** recombination of the photo-induced e–h pairs could be effectively restrained by the Z-scheme passageway between the flg-C_3N_4 and α-MoO_3 NNs in the composite,which could also promise a high redox ability to degrade *** it became possible for the prepared photocatalyst to absorb light in a wide range of *** detailed mechanism was studied by electron spin-resonance spectroscopy(ESR).The low-dimensional nanostructure of the two constituents(α-MoO_3 NNs with one-dimensional structure and flg-C_3N_4 with two-dimensional structure) endowed the composite with varieties of excellent physicochemical properties,which facilitated the transfer and diffusion of the photoelectrons and increased the specific surface area and the active *** 10 wt% flg-C_3N_4/α-MoO_3 NNs showed the best photocatalytic performance toward RhB degradation,the rate of which was 71.86%,～2.6 times higher than that ofα-MoO_3 NNs.

关键词： Flg-C3N4 α-MoO3 nanoneedles All-solid-state Z-scheme mechanism Low-dimensional nanostructure Photocatalytic degradation

Bimetallic NiCo2S4 nanoneedles Anchored on Mesocarbon Microbeads as Advanced Electrodes for Asymmetric Supercapacitors

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Nano-Micro Letters 2019年第2期11卷 229-243页

作者： Yu Zhang Yihe Zhang Yuanxing Zhang Haochen Si Li Sun Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences

Bimetallic Ni–Co sulfides are outstanding pseudocapacitive materials with high electrochemical activity and excellent energy storage performance as electrodes for high-performance *** this study,a novel urchin-like NiCo2S4@mesocarbon microbead(NCS@MCMB) composite with a core–shell structure was prepared by a facile two-step hydrothermal *** highly conductive MCMBs offered abundant adsorption sites for the growth of NCS nanoneedles,which allowed each nanoneedle to fully unfold without aggregation,resulting in improved NCS utilization and efficient electron/ion transferin the *** applied as an electrode material for supercapacitors,the composite exhibited a maximum specific capacitance of 936 Fg-1 at 1 Ag-1 and a capacitance retention of 94% after 3000 cycles at 5 Ag-1,because of the synergistic effect of MCMB and ***,we fabricated an asymmetric supercapacitor based on the NCS@MCMB composite,which exhibited enlarged voltage windows and could power a light-emitting diode device for several minutes,further demonstrating the exceptional electrochemical performance of the NCS@MCMB composite.

关键词： Bimetallic sulfides NiCo2S4 nanoneedles Mesocarbon microbeads Asymmetric supercapacitor

A Review of Nano/Micro/Milli Needles Fabrications for Biomedical Engineering

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Chinese Journal of Mechanical Engineering 2022年第3期35卷 51-79页

作者： Bin Liu Xin Yi Ying Zheng Zhishan Yuan Jingbo Yang Jian Yang Xiao Yu Lelun Jiang Chengyong Wang Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments School of Biomedical EngineeringShenzhen Campus of Sun Yatsen UniversityShenzhen 518107China Guangdong Provincial Key Laboratory of Minimally Invasive Surgical Instruments and Manufacturing Technology School of Electromechanical EngineeringGuangdong University of TechnologyGuangzhou 510006China

Needles,as some of the most widely used medical devices,have been effectively applied in human disease prevention,diagnosis,treatment,and *** 1D needle can easily penetrate cells/organs by generating highly localized stress with their sharp tips to achieve bioliquid sampling,biosensing,drug delivery,surgery,and other such *** this review,we provide an overview of multiscale needle fabrication techniques and their biomedical *** are classified as nanoneedles,microneedles and millineedles based on the needle diameter,and their fabrication techniques are *** bridge the inside and outside of cells,achieving intracellular electrical recording,biochemical sensing,and drug *** penetrate the stratum corneum layer to detect biomarkers/bioelectricity in interstitial fluid and deliver drugs through the skin into the human circulatory ***,including puncture,syringe,acupuncture and suture needles,are ***,conclusions and future perspectives for next-generation nano/micro/milli needles are discussed.

关键词： nanoneedles Microneedles Millineedles Fabrication methods Biomedical Engineering

Structural and morphological characterizations of ZnO nanopowder synthesized by hydrothermal route using inorganic reactants

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Journal of Semiconductors 2014年第12期35卷 8-12页

作者： D.Djouadi M.Meddouri A.Chelouche L.Hammiche A.Aksas Laboratoire de Génie de l'Environnement(LGE) Université de Béjaia Algérie

Zinc oxide nanoscale powder has been synthesized by a hydrothermal route using zinc sulfate and sodium hydroxide. The as-prepared powder was annealed at 600 ℃ for 2 h and then characterized by X-ray diffraction（XRD）, scanning electron microscopy and infra-red Fourier transformed spectroscopy. XRD measurements have shown a Zn O hexagonal wurtzite polycrystalline structure with good crystallinity and the formation of a new sodium pyrosulfate phase in the as-prepared powder. The annealing improves the crystalline quality of the powder and transforms the sodium pyrosulfate phase to a sodium sulfate one. The thermal treatment does not affect the lattice parameters and the Zn–O bond length but improves the random orientation of the Zn O crystallites *** O crystallites have an interconnected-nano-needles morphology forming irregular shaped aggregates. The size of the crystallites is about 20 nm. EDX analysis has shown the presence of C and S in addition to Zn and O. FTIR spectra confirm the formation of Zn O and sodium sulfate. The synthesized Zn O powder has a very high crystalline quality and the used method is a very advantageous one for the fabrication of nanosized metal oxides from inorganic reactants for photo-catalysis applications.

关键词： Zn O hydrothermal method zinc sulfate nanoneedles DRX SEM FTIR

W-doped VO2(M) with tunable phase transition temperature

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W-doped VO2(M) with tunable phase transition temperature