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Ignition dynamics of radio frequency discharge in atmospheric pressure cascade glow discharge

Chinese Physics B 2023年第2期32卷 354-357页

作者：张亚容韩乾翰方骏林郭颖石建军 College of Science Donghua UniversityShanghai 201620China Textile Key Laboratory for Advanced Plasma Technology and Application Donghua UniversityShanghai 201620China

A cascade glow discharge in atmospheric helium was excited by a microsecond voltage pulse and a pulse-modulated radio frequency(RF) voltage, in which the discharge ignition dynamics of the RF discharge burst was investigated experimentally. The spatio-temporal evolution of the discharge, the ignition time and optical emission intensities of plasma species of the RF discharge burst were investigated under different time intervals between the pulsed voltage and RF voltage in the experiment. The results show that by increasing the time interval between the pulsed discharge and RF discharge burst from 5 μs to 20 μs, the ignition time of the RF discharge burst is increased from 1.6 μs to 2.0 μs, and the discharge spatial profile of RF discharge in the ignition phase changes from a double-hump shape to a bell-shape. The light emission intensity at 706 nm and 777 nm at different time intervals indicates that the RF discharge burst ignition of the depends on the number of residual plasma species generated in the pulsed discharges.

关键词： pulsed voltage modulated radio frequency radio frequency(RF)discharge burst residual plasma species

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S-scheme heterojunction construction of Fe/BiOCl/BiVO4 for enhanced photocatalytic degradation of ciprofloxacin

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Progress in Natural science:Materials International 2024年第2期34卷 290-303页

作者： Guanlong Yu Qifang Sun Yi Yang Si Chen Yuannan Long Yifu Li Shiyong Ge Dian Zheng School of Hydraulic and Environmental Engineering Changsha University of Science & Technology Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province School of Environmental Engineering Wuhan Textile University

With the growing problem of water pollution caused by antibiotics,the development of photocatalysts with high photogenerated carrier separation efficiency is crucial.A high-efficiency microsphere Fe/BiOCl/BiVO4with Sscheme heterojunction was synthesized by solvothermal method and its ciprofloxacin（CIP） degradation performance were investigated under visible ***,FT-IR,SEM,EDS,HRTEM and XPS results show that the photocatalytic have good crystallization,morphology and the formed a *** photocatalytic performance of Fe/BiOCl/BiVO4for CIP was superior to pure BiOCl and BiVO4due to the microsphere and formed heterostructure between BiOCl and *** influencing factors of CIP degradation by Fe/BiOCl/BiVO4were investigated,and the results showed that Fe/BiOCl/BiVO4had high degradation efficiency not only at pH 5-9,but also in the presence of inorganic Cl-,NO3-and metal *** the optimal conditions,the degradation rate of CIP was up to 100% in 75 *** addition to CIP,the Fe/BiOCl/BiVO4photocatalysts degraded other organic pollutants,such as tetracycline,oxytetracycline,chlortetracycline,ofloxacin,levofloxacin,and rhodamine B,by more than 92%.The main active species were photogenerated holes（h+） and superoxide radicals（·O2-）.In addition,possible intermediates and toxicity of intermediates were analyzed and five potential pathways for CIP degradation were proposed.

关键词： BiOCl/BiVO4 Fe3+ doping Organic pollutant Photocatalysis S-scheme heterojunction

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Establishing a Gross Primary Productivity Model by SIF and PRI on the Rice Canopy

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Plant Phenomics 2024年第1期6卷 133-144页

作者： Zhanhao Zhang Jianmao Guo Shihui Han Shuyuan Jin Lei Zhang School of Ecology and Applied Meteorology Nanjing University of Information Science&TechnologyNanjing 210044China Jiangsu Key Laboratory of Agricultural Meteorology Nanjing 210044China National Meteorological Centre China Meteorological AdministrationBeijing 100081China

Solar-induced chlorophyll fluorescence(SIF)has shown remarkable results in estimating vegetation carbon cycles,and combining it with the photochemical reflectance index(PRI)has great potential for estimating gross primary productivity(GPP).However,few studies have used SIF combined with PRI to estimate crop canopy *** temporal and spatial variability between SIF,PRI,and GPP has also been found in remote sensing observations,and the observed PRI and SIF are influenced by the ratio of different observed information(e.g.,background,direct sunlit,and shaded leaves)and the physiological state of the *** this study,the PRI and SIF from a multi-angle spectrometer and the GPP from an eddy covariance system were used to assess the ability of the PRI to enhance the SIF-GPP estimation model.A semi-empirical kernel-driven Bidirectional Reflectance Distribution Function(BRDF)model was used to describe the hotspot PRI/SIF(PRIhs/SIFhs),and a modified two-leaf model was used to calculate the total canopy PRI/SIF(PRItot/SIFtot).We compared the accuracies of PRIhs/SIFhs and PRItot/SIFtot in estimating *** results indicated that the PRItot+SIFtot-GPP model performed the best,with a correlation coefficient(R2)of the validation dataset of 0.88,a root mean square error(RMSE)of 3.74,and relative prediction deviation(RPD)of *** leaf area index(LAI)had a linear effect on the PRI/SIF estimation of GPP,but the temperature and vapor pressure differences had nonlinear *** with hotspot PRIhs/SIFhs,PRItot/SIFtot exhibited better consistency with GPP across different time *** research demonstrates that PRI is effective in enhancing SIF and PRI for estimating GPP on the rice canopy and also suggests that the two-leaf model would contribute to the vegetation index tracking the real-time crop productivity.

关键词： estimating estimation prediction

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Solid-state synthesis and ion transport characteristics of the β-KSbF_(4) for all-solid-state fluoride-ion batteries

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Journal of Energy Chemistry 2024年第7期94卷 758-767页

作者： Jiali Liu Huahui Zhao Jingcheng Xia Lingguang Yi Xiaoyi Chen Dongdu Li Shuhan Ni Xinyi Su Yixuan Chen Min Liu Xianyou Wang National Base for International Science&Technology Cooperation National Local Joint Engineering Laboratory for Key Materials of New Energy Storage BatteryHunan Province Key Laboratory of Electrochemical Energy Storage&ConversionSchool of ChemistryXiangtan UniversityXiangtan 411105HunanChina College of New Energy Ningbo University of TechnologyNingbo 315336ZhejiangChina

All-solid-state fluoride ion batteries(FIBs)have been recently considered as a post-lithium-ion battery system due to their high safety and high energy *** like all solid-state lithium batteries,the key to the development of FIBs lies in room-temperature electrolytes with high ionic conductivity.β-KSbF_(4) is a kind of promising solid-state electrolyte for FIBs owing to its rational ionic conductivity and relatively wide electrochemical stability window at room ***,the previous synthesis routes ofβ-KSbF_(4) required the use of highly toxic hydrofluoric acid and the ionic conductivity of as-prepared product needs to be further ***,the β-KSbF_(4) sample with an ionic conductivity of 1.04×10^(-4)s cm^(-1)(30°C)is synthesized through the simple solid-state *** order to account for the high ionic conductivity of the as-synthesizedβ-KSbF_(4),X-ray diffraction(XRD),scanning electron microscopy(SEM),and energy dispersive X-ray spectroscopy(EDS)are used to characterize the physic-ochemical *** results show that the as-synthesizedβ-KSbF_(4) exhibits higher carrier concentra-tion of 1.0×10^(-6)S cm-Hz^(-1)K and hopping frequency of 1.31×10^(6)Hz at 30°C due to the formation of the fluorine ***,the hopping frequency shows the same trend as the changes of ionic conductivity with the changes of temperature,while the carrier concentration is found to be almost *** two different trends indicate the hopping frequency is mainly responsible for the ionic conduc-tion behavior withinβ-KSbF_(4).Furthermore,the all-solid-state FIBs,in which Ag and Pb+PbF_(2) are adopted as cathode and anode,andβ-KSbF_(4) as fluoride ion conductor,are capable of reversible charge and *** assembled FIBs show a discharge capacity of 108.4 mA h g^(-1) at 1st cycle and 74.2 mA h g^(-1) at 50th *** on an examination of the capacity decay mechanism,it has been found that deterioration of the electrolyte/electrode int

关键词： Solid-state electrolyte Carrier concentration Hopping frequency β-KSbF_(4) All-solid-state fluoride ion batteries

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pH-Sensitive Anti-oxidation Composite Cotton Yarn Loaded with TPU/CUR Nanoparticles

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Fibers and Polymers 2025年第4期26卷 1605-1615页

作者： Li, Xinran Zhou, Yuyang Zheng, Guangming Guo, Jinke Shang, Shanshan Xin, Binjie School of Textiles and Fashion Shanghai University of Engineering Science Shanghai201620 China Key Laboratory of Textile Science and Technology Ministry of Education College of Textiles Donghua University Shanghai201620 China

This study investigates the use of easily accessible nano-biological materials with color change capabilities, antioxidant properties, and antibacterial characteristics. Utilizing electrospinning technology, curcumin-loaded composite elastic polyurethane nanoparticles were prepared and successfully integrated into pre-combed cotton web through a spraying and bonding process. Subsequently, the yarn was produced using traditional spinning methods, including coarse and fine yarn spinning. Cotton webs loaded with varying curcumin contents (1%, 2%, 3%, and 4% by mass) were successfully formed at a feed rate of 60 mm/s. The micro-morphology, macro properties, and functional characteristics of these webs were examined post-yarn spinning at 25 °C and a relative humidity of 60%. Scanning electron microscopy observations indicated that as the curcumin loading content increased, the distribution of curcumin nanoparticles on the cotton fiber surface became more uniform. This research seeks to address the effective loading of curcumin nanoparticles into yarn and to explore the impact of curcumin content on the properties of the resultant yarn. © The Author(s), under exclusive licence to the Korean Fiber Society 2025.

关键词： Biological materials

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Tailoring Cathode-Electrolyte Interface for High-Power and Stable Lithium-Sulfur Batteries

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Nano-Micro Letters 2025年第4期17卷 181-211页

作者： Mengting Liu Ling-Jiao Hu Zhao-Kun Guan Tian-Ling Chen Xin-Yu Zhang Shuai Sun Ruoli Shi Panpan Jing Peng-Fei Wang Center of Nanomaterials for Renewable Energy State Key Laboratory of Electrical Insulation and Power EquipmentSchool of Electrical EngineeringXi’an Jiaotong UniversityXi’an 710049People’s Republic of China Low-Dimensional Materials and Photo/Electrochemical Technology Lab School of Materials Science and EngineeringShaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science&TechnologyXi’an 710021People’s Republic of China

Global interest in lithium-sulfur batteries as one of the most promising energy storage technologies has been sparked by their low sulfur cathode cost,high gravimetric,volumetric energy densities,abundant resources,and environmental ***,their practical application is significantly impeded by several serious issues that arise at the cathode-electrolyte interface,such as interface structure degradation including the uneven deposition of Li_(2)S,unstable cathode-electrolyte interphase(CEI)layer and intermediate polysulfide shuttle ***,an optimized cathode-electrolyte interface along with optimized electrodes is required for overall ***,we comprehensively outline the challenges and corresponding strategies,including electrolyte optimization to create a dense CEI layer,regulating the Li_(2)S deposition pattern,and inhibiting the shuttle effect with regard to the solid-liquid-solid pathway,the transformation from solid-liquid-solid to solid-solid pathway,and solid-solid pathway at the cathode-electrolyte *** order to spur more perceptive research and hasten the widespread use of lithium-sulfur batteries,viewpoints on designing a stable interface with a deep comprehension are also put forth.

关键词： Lithium-sulfur batteries Shuttle effect Cathode-electrolyte interface Structural enhancement Reaction pathway

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Analysis of the mechanism of orientations evolution during hot rolling and mechanical properties of TiBw/TA15 composites based on crystal plasticity finite element model

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Journal of Materials science & technology 2023年第36期167卷 137-151页

作者： Zhenlun Li Qingxin Kang Xiaochong Sui Xunhu Xu Liqiang Zhan Guofeng Wang School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of TechnologyHarbin 150006China School of Architectural Engineering Harbin University of Science&TechnologyHarbin 150080China

An in-depth understanding of the crystal orientation evolution during hot rolling of TiB whisker(TiBw)/TA15 composites and the anisotropy of the as-rolled plates can help fully utilize the material *** this paper,the crystal plasticity finite element models of high-temperature(HT)β-phase and room-temperature(RT)α-phase were constructed from electron backscattering diffraction *** on this,the orientation evolution during hot rolling in the single-phase region and the effects of the matrix texture on the mechanical properties of the as-rolled plates were *** effect of TiBw on the anisotropy was studied by the composites finite element *** showed that theα-fiber texture of theβ-phase was formed during HT *** texture was converted to the T-texture of theα-phase at RT during cooling according to the Burgers orientation *** TiBw had little effect on the matrix texture *** TiBw and matrix texture caused the matrix to have higher strength along the rolling direction and the transverse direction,*** matrix texture dominated the difference in mechanical properties because its effect exceeded that of *** effect of the matrix on the mechanical properties was caused by the Schmid factors(SFs)and the critical resolved shear stress(CRSS)of the slip system *** slip mode was influenced by SFs determined by the angular rela-tionship between the crystal orientation and the loading *** CRSS of the activated slip system determined the yield strength.

关键词： TiBw/TA15 composites Crystal plasticity finite element model Orientation Anisotropic Slip mode

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Interfacial Ru nanoclusters in tandem with single atoms on oxygen-vacancy regulated CeO_(2)for anion exchange membrane seawater-splitting

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Journal of Energy Chemistry 2025年第3期102卷 618-627页

作者： Yue Wang Jing Li Pengfei Yang Hongdong Li Guangrui Xu Yunmei Du Caixia Li Wei Jin Tianyi Ma Zexing Wu Lei Wang Key Laboratory of Eco-chemical Engineering Ministry of EducationInternational Science and Technology Cooperation Base of Eco-chemical Engineering and Green ManufacturingCollege of Chemistry and Molecular EngineeringCollege of Chemical EngineeringQingdao University of Science&TechnologyQingdao 266042ShandongChina College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina College of Materials Science and Engineering Qingdao University of Science&TechnologyQingdao 266042ShandongChina College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009JiangsuChina School of Science STEM CollegeRMIT University 3083VictoriaAustralia

A hydrogen spillover-bridged water dissociation/hydrogen formation could concurrently promote Volmer/Tafel process and improve the efficiency of hydrogen evolution reaction(HER)under alkaline ***,it is still challenging to promote occurrence of hydrogen spillover for the large interfacial transport barriers of H_(2)O and hydrogen on active ***,the strategy of energy barrier gradient to induce hydrogen spillover was proposed by constructing Ru nanoclusters coupled with single atom onto oxygen vacancy cerium dioxide(Ru/CeO_(2)-Ov-2).Density functional theory(DFT)calculations uncover that the adsorption/desorption of H2O occurs at the Ru clusters sites and then the dissociated H*spontaneously overflows from Ru clusters with high binding energy into the adjacent Ru single atom sites with low binding energy,which facilitate the hydrogen ***,the synthesized Ru/CeO_(2)-Ov-2 exhibits a small overpotential of 41 mV at 10 mA cm^(-2)and good stability at 500 mA cm^(-2)for 100 h in alkaline seawater,which could be ascribed to the rapid hydrogen spillover and strong coupling interaction between Ru and CeO_(2)-O_(v).This work provides a novel insight that synthesizing cooperative sites with energy barrier gradient helps to promote hydrogen spillover and accelerate the Volmer/Tafel process of HER.

关键词： Electrocatalyst CeO_(2) Ru Oxygen vacancy Hydrogen evolution reaction

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Bulk ultrafine grained microstructures with high thermal stability via intragranular precipitation of coherent particles

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Journal of Materials science & technology 2024年第14期181卷 220-230页

作者： Shenglong Liang Xiaochun Liu Suihe Jiang Huihui Zhu Wei Li Leqing Liu Xiongjun Liu Yuan Wu Xiaobin Zhang Hui Wang Zhaoping Lu Beijing Advanced Innovation Centre for Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China Yangjiang Branch Guangdong Laboratory for Materials Science and Technology(Yangjiang Advanced Alloys Laboratory)Yangjiang 529500China Institute of Metals College of Materials Science and EngineeringChangsha University of Science&TechnologyChangsha 410000China Liaoning Academy of Materials Shenyang 110000China Inner Mongolia University of science and technology Instrumental Analysis CenterBaotou 014000China

Producing ultrafine-grained(UFG)microstructures with enhanced thermal stability is an important yet challenging route to further improve mechanical properties of structural ***,a high-performance bulk UFG copper that can stabilize even at temperatures up to 750℃(∼0.75 T m,T m is the melting point)was fabricated by manipulating its recrystallization behavior via low alloying of *** of 1 wt.%–1.5 wt.%of Co can trigger quick and copious intragranular clustering of Co atoms,which offers high Zener pinning pressure and pins the grain boundaries(GBs)of freshly recrystallized ul-trafine *** to the fact that the subsequent growth of the coherent Co-enriched nanoclusters was slow,sufficient particles adjacent to GBs remained to inhibit the migration of GBs,giving rise to the UFG microstructure with prominently high thermal *** work manifests that the strategy for pro-ducing UFGs with coherent precipitates can be applied in many alloy systems such as Fe-and Cu-based,which paves the pathway for designing advanced strain-hardenable UFGs with plain compositions.

关键词： Copper alloys Coherent precipitation Ultrafine-grained materials Recrystallization Microstructural stability

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Optimization for Microbial Degumming of Ramie with Bacillus subtilis DZ_(5) in Submerged Fermentation by Orthogonal Array Design and Response Surface Methodology

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Journal of Donghua University(English Edition) 2023年第5期40卷 475-481页

作者：刘芬陈杨栋朱鹏曹张军张兴群 College of Biological Science and Medical Engineering Donghua UniversityShanghai 201620China Key Laboratory of Science&Technology of Eco-Textile Ministry of EducationDonghua UniversityShanghai 201620China College of Textile and Clothing Xinjiang UniversityUrumqi 830046China

As a kind of natural fiber,ramie fiber has distinctive advantages in textile application,but the application is limited due to the traditional degumming *** with the traditional degumming process,the microbial degumming process has many *** obtain the optimal conditions for degumming ramie with Bacillus subtilis DZ_(5)(BS DZ_(5)),a combined statistical approach of orthogonal array design(OAD)and response surface methodology(RSM)was *** influences of initial pH of the bacteria medium,culture temperature,shaking speed,degumming time and inoculum size on submerged fermentation degumming were evaluated by using fractional factorial *** main factors in the analysis were culture temperature,shaking speed and initial *** residual gum mass fraction was used as the optimization index,and the optimal conditions for degumming were determined by central composite design and *** with only a limited number of experiments,an optimal ramie microbial degumming condition was found as the culture temperature of 40℃,the initial pH in the culture medium of 8.5,the shaking speed of 205 r/min,the degumming time of 96 h and the inoculum size of 5%.After microbial degumming of ramie under the optimal conditions,there was only 10.6%residual gum by mass in the *** addition,the effective degumming of BS DZ_(5)was also confirmed by a scanning electron microscope(SEM).

关键词： microbial degumming optimization ramie orthogonal array design(OAD) response surface methodology(RSM)

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