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killing two birds with one stone: Enhancing the photoelectrochemical water splitting activity and stability of BiVO4 by Fe ions association

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Chinese Chemical Letters 2024年第12期35卷 182-187页

作者： Hailang Deng Abebe Reda Woldu Abdul Qayum Zanling Huang Weiwei Zhu Xiang Peng Paul k.chu Liangsheng Hu Department of Chemistry and key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou University Department of Mechanical Engineering Shantou University Shantou Huaxing Metallurgical Equipment Co. Ltd. Hubei key Laboratory of Plasma Chemistry and Advanced Materials School of Materials Science and EngineeringWuhan Institute of Technology Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong Kong Chemistry and Chemical Engineering Guangdong Laboratory

Bi VO4is a promising semiconducting photoanode for photoelectrochemical （PEC） water splitting due to its suitable ***,the dissolution of V5+and sluggish reaction kinetics at the surface in the oxygen evolution reaction （OER） limit its ***,we report a convenient strategy to change the microenvironment by adding Fe（Ⅲ） into the *** the PEC process,Fe（Ⅲ） ions not only improve the current density,but also show excellent stability toward Bi ***,the current increases by more than 1.7 times compared to that without Fe（Ⅲ）.Photoelectrochemical,morphological,and structural characterizations reveal that the FeOOH co-catalyst produced in situ on the Bi VO4photoanode by cyclical formation of the intermediates at the electrode/electrolyte interface during OER accelerates the OER kinetics and prevents photo-corrosion by suppressing the dissolution of V5+.The results reveal a new strategy for the multifunctional modification of photoanodes for efficient solar conversion.

关键词： Photoelectrochemical water splitting BiVO4 photoanodes Fe(Ⅲ) ions Oxygen evolution reaction Dynamic changes

Comprehensive identification and function study of Arabidopsis chloroplast proteome through systems biology approaches

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Comprehensive identification and function study of Arabidops...

第十届上海市植物生物学青年学术研讨会

作者： Yiheng Lan Peng Li Wenjuan Wu Ivan k.chu Jirong Huang Tieliu Shi The Center for Bioinformatics and Computational Biology Shanghai Key Laboratory of Regulatory Biology the Institute of Biomedical Sciences and School of Life Sciences East China Normal University The institute of plant physiology and ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Department of Chemistry The University of Hong Kong

Although chloroplast plays crucial roles in plant growth and development,its proteome remains further *** present study,three Arabidopsis mutants were used to identify chloroplast proteome,among which,low level of Fts...

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电动拖拉机双电源并联控制研究

农机化研究 2025年第1期47卷 234-238页

作者：初香港王宝超陈叶青岛农业大学机电工程学院山东青岛266109

电动拖拉机具有结构简单和节能减排等优点,但现有电动拖拉机作业时采用单一动力电池能源,存在续航时间短的问题。为了提高电动拖拉机长续航供电能力,提出了一种基于下垂控制的直流双电源并联均流联合供电方案,利用MatLab/Simulink搭建... 详细信息

电动拖拉机具有结构简单和节能减排等优点,但现有电动拖拉机作业时采用单一动力电池能源,存在续航时间短的问题。为了提高电动拖拉机长续航供电能力,提出了一种基于下垂控制的直流双电源并联均流联合供电方案,利用MatLab/Simulink搭建了系统模型。仿真试验表明:单电源可以实现升压稳压控制;基于下垂控制的双电源并联均流能够实现双电源的电流均流;当切换不同功率负载时,系统电压随功率增加按比例下调,验证了该方案的可行性。

关键词：电动拖拉机双电源并联下垂控制动态仿真

Analysis of effect factors-based stochastic network planning model

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Journal of Systems Engineering and Electronics 2008年第1期19卷 112-118页

作者： chu chunchao China Academy of Transportation Science Beijing 100029 P. R. China

Looking at all the indeterminate factors as a whole and regarding activity durations as independent random variables, the traditional stochastic network planning models ignore the inevitable relationship and dependence among activity durations when more than one activity is possibly affected by the same indeterminate factors. On this basis of analysis of indeterminate effect factors of durations, the effect factors-based stochastic network planning （EFBSNP） model is proposed, which emphasizes on the effects of not only logistic and organizational relationships, but also the dependent relationships, due to indeterminate factors among activity durations on the project period. By virtue of indeterminate factor analysis the model extracts and describes the quantitatively indeterminate effect factors, and then takes into account the indeterminate factors effect schedule by using the Monte Carlo simulation technique. The method is flexible enough to deal with effect factors and is coincident with practice. A software has been developed to simplify the model-based calculation, in *** language. Finally, a case study is included to demonstrate the applicability of the proposed model and comparison is made with some advantages over the existing models.

关键词： stochastic network planning activity duration effect factor

Microwave Synthesis of Cuprous Oxide Micro-/Nanocrystals with Different Morphologies and Photocatalytic Activities

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Journal of Materials Science & Technology 2011年第4期27卷 289-295页

作者： Qingwei Zhu Yihe Zhang Jiajun Wang Fengshan Zhou Paul k. chu State key Laboratory of Geological Processes & Mineral Resources National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences (Beijing) Beijing 100083 China Department of Powder Metallurgy and Special Materials General Research Institute of Non-Ferrous MetalBeijing 100088 China Department of Physics & Materials Science City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong China

Cuprous oxide micro-/nanocrystals were synthesized by using a simple liquid phase reduction process under microwave irradiation. Copper sulfate was used as the starting materials and macromolecule surfactants served as the templates. The morphologies phase and optical properties of them are characterized by X-ray diffraction （XRD）, scanning elec- tron microscopy （SEM） and ultraviolet-visible diffuse reflection absorptive spectra （UV-vis/DRS）, respectively. The crystals had four different shapes, namely spheres, strips, octahedrons, and dandelions. The photocatalytic behavior of the cuprous oxide particles were investigated by monitoring the degradation of rhodamine B. In spite of the differ- ent morphologies, all of the cuprous oxide micro-/nanocrystals exhibited photocatalytic activities under visible light irradiation in the following order： dandelions, strips, spheres, and octahedral crystals. The photocatalytic degradation rates of rhodamine B are 56.37%, 55.68%, 51.83% and 46.16%, respectively. The morphology affects significantly the photocatalytic performance.

关键词： Cuprous oxide Synthesis Morphology Photocatalytsis

Uniformity of TiN Films Fabricated by Hollow Cathode Discharge

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Plasma Science and Technology 2010年第2期12卷 212-217页

作者：姜海富巩春志田修波杨士勤 R.k.Y.FU P.k.chu State key Lab.of Advanced Welding Production & Technology School of Material Science and Engineering Harbin Institute of Technology Department of Physics and Materials Science City University of Hong Kong

Titanium nitride （TIN） films were deposited on AISI 304 stainless steel substrates using hollow cathode plasma physical vapor deposition （HC-PVD）. Titanium was introduced by eroding the Ti cathode nozzle and TiN was formed in the presence of a nitrogen plasma excited by radio frequency （RF）. The substrate bias voltage was varied from 0 to -300 V and the uniformity in film thickness, surface roughness, crystal size, microhardness and wear resistance for the film with a diameter of 20 mm was evaluated. Although the central zone of the plasma had the highest ion density, the film thickness did not vary appreciably across the sample. The results from atomic force microscopy （AFM） revealed a low surface roughness dominated by an island-like morphology with a similar crystal size on the entire surface. Higher microhardness was measured at the central zone of the sample. The sample treated at -200 V had excellent tribological properties and uniformity.

关键词： hollow cathode TiN film uniformity

Regulation of TiO_(2) nanoarrays on titanium implants for enhanced osteogenic activity and immunomodulation

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Journal of Materials Science & Technology 2023年第19期150卷 233-244页

作者： Ruoyu Li Hongyu Zhang Xiaohong Yao Bin Tang Paul k.chu Xiangyu Zhang Shanxi key Laboratory of Biomedical Metal Materials College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China Department of Occupational Disease Second Hospital of Shanxi Medical UniversityTaiyuan 030001China Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina College of Biomedical Engineering Taiyuan University of TechnologyTaiyuan 030024China

The surface topography of implants plays a major role in osteogenesis and *** this study,three types of TiO_(2) nanoarrays including nanorod arrays with a diameter of 45 nm(TiO_(2)-N),nanorod arrays with a diameter of 60 nm(TiO_(2)-N N),and nanocone arrays(TiO_(2)-NW)are prepared on titanium and the behavior of bone marrow stromal cells(BMSCs)and polarization of macrophages are *** to the planar titanium control,TiO_(2) nanoarrays facilitate osteogenesis of BMSCs and stimulate the pro-healing M2 ***,adhesion,spreading,proliferation,and osteogenic differentiation of BMSCs are more pronounced on TiO_(2)-N N than both TiO_(2)-N and TiO_(2)-***_(2)-NN also produces the best immune microenvironment,while TiO_(2)-NW is more favorable than TiO_(2)-NN from the viewpoint of cell adhesion and spreading of osteoblasts.

关键词： TiO_(2)nanoarrays Osteogenic activity Immunomodulation Hydrothermal treatment

等离子体浸没离子注入(PIII)过程中初始离子阵鞘层尺度内各物理量的时空演化

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真空科学与技术学报 2005年第2期25卷 115-119页

作者：黄永宪田修波杨士勤黄志俊 Ricky Fu Paul k.chu 哈尔滨工业大学现代焊接生产技术国家重点实验室黑龙江哈尔滨150001 香港城市大学物理及材料科学系

等离子体浸没离子注入(PIII)是用于材料表面改性的一种较新的、廉价的、非视线的技术。靶体被浸没在等离子体中,等离子体中的离子在靶体负脉冲偏压的作用下注入靶体而实现材料的表面改性。为了描述等离子体浸没离子注入过程,我们引用了... 详细信息

等离子体浸没离子注入(PIII)是用于材料表面改性的一种较新的、廉价的、非视线的技术。靶体被浸没在等离子体中,等离子体中的离子在靶体负脉冲偏压的作用下注入靶体而实现材料的表面改性。为了描述等离子体浸没离子注入过程,我们引用了一维粒子模型(PIC)对其进行了数值模拟,该模型通过求解空间电势的Poisson方程,电子的Bolzmann分布以及离子在网格中受力运动的Newton运动方程来完成。本文重点研究了一个初始离子阵鞘层内电势、离子浓度、离子注入靶体的速度和动能以及离子流密度的时空演化规律。

关键词：等离子体浸没离子注入离子注人鞘层子阵 PⅢ 物理量 Poisson方程材料表面改性 Newton 时空演化规律离子流密度脉冲偏压数值模拟粒子模型求解空间运动方程离子浓度靶体电势一维电子动能

Spatial Potential Distribution around Trench Target during Plasma Immersion Ion Implantation

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Journal of Materials Science & Technology 2003年第z1期19卷 94-96页

作者： Xiubo Tian chunbei Wei Shiqin Yang Paul k. chu Ricky k.Y. Fu State key Lab. of Welding Production Technology School of Mater. Sci. & Eng. Harbin Institute of Technology Harbin 15001 China Department of Physics & Materials Science City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong State Key Lab. of Welding Production Technology School of Mater. Sci. & Eng. Harbin Institute of Technology Harbin 15001 China Department of Physics & Materials Science City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong State Key Lab. of Welding Production Technology School of Mater. Sci. & Eng. Harbin Institute of Technology Harbin 15001 China Department of Physics & Materials Science City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong State Key Lab. of Welding Production Technology School of Mater. Sci. & Eng. Harbin Institute of Technology Harbin 15001 China Department of Physics & Materials Science City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong State Key Lab. of Welding Production Technology School of Mater. Sci. & Eng. Harbin Institute of Technology Harbin 15001 China Department of Physics & Materials Science City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong

Plasma ion implantation, an alternative to conventional beam-line ion implantation, is a sheath-acceleration ionbombardment technique and the initial sheath is crucial to the process efficacy and surface properties. The initialspatial potential distribution in the plasma sheath around a trench-shaped target is simulated using a two-dimensionalmodel in this work. The results demonstrate that the sheath structure depends very much on the trench width. Thepotential drop in the trench may be quite small and the sheath expands outward if the width is small. This leadsto a smaller incident ion dose into the sidewalls of the trench. In contrast, the initial potential distribution in thecentral region is quite similar to that without a trench if the trench width is larger than twice the ion-matrix sheaththickness for an infinite plane. Consequently, a higher ion dose into the sidewalls is possible.

关键词： Plasma ion implantation, Trench target, Potential distribution