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Fabrication of Superhydrophobic Surface with Different Metal Films on Aluminum Alloy

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Chemical Research in Chinese Universities 2016年第2期32卷 155-158页

作者： WANG Yang LIU Xiaowei ZHANG Haifeng zhou zhiping Department of Microelectronics Harbin Institute of Technology Harbin 150001 P. R. China

A simple technique was developed for the fabrication of a superhydrophobic surface on the aluminum alloy sheets. Different hierarchical structures（Ag, Co, Ni and Zn） were formed on the aluminum surface by the galvanic replacement reactions. After the chemical modification of them with fluorination, the wettability of the surfaces was changed from superhydrophilicity to superhydrophobicity. Scanning electron microscopy（SEM）, energy dispersive spectrometry（EDS） and water contact angle measurement were performed to characterize the morphologi- cal characteristic, chemical composition and superhydrophobicity of the surfaces. The as-prepared superhydrophobic surfaces showed a water contact angle as high as ca.160° and sliding angle as low as ca.3°. We hope the method to produce superhydrophobic surface can be used in many fields.

关键词： Superhydrophobicity Water contact angle Aluminum alloy Micro-nano structure

Optimization of phenol degradation by Candida tropicalis Z-04 using Plackett-Burman design and response surface methodology

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Journal of Environmental Sciences 2011年第1期23卷 22-30页

作者： Jiangya zhou Xiaojuan Yu Cong Ding zhiping Wang Qianqian zhou Hao Pao Weimin Ca School of Environmental Science and Engineering Shanghai Jiaotong University Dongchuan Road 800 Shanghai 200240 China.

Statistical experimental designs were used to optimize the process of phenol degradation by Candida tropicalis Z-04, isolated from phenol-degrading aerobic granules. The most important factors influencing phenol degradation （p 〈 0.05）, as identified by a two-level Plackett-Burman design with 11 variables, were yeast extract, phenol, inoculum size, and temperature. Steepest ascent method was undertaken to determine the optimal regions of these four significant factors. Central composite design （CCD） and response surface analysis were adopted to further investigate the mutual interactions between these variables and to identify their optimal values that would generate maximum phenol degradation. The analysis results indicated that interactions between yeast extract and temperature, phenol and temperature, inocuhim size and temperature affected the response variable （phenol degradation） significantly. The predicted results showed that the maximum removal efficiency of phenol （99.10%） could be obtained under the optimum conditions of yeast extract 0.41 g/L, phenol 1.03 g/L, inoculum size 1.43% （V/V） and temperature 30.04℃. These predicted values were further verified by validation experiments. The excellent correlation between predicted and experimental values confirmed the validity and practicability of this statistical optimum strategy. This study indicated the excellent ability of C. tropicalis Z-04 in degrading high-strength phenol. Optimal conditions obtained in this experiment laid a solid foundation for further use of this microorganism in the treatment of highstrength phenol effluents.

关键词： phenol degradation Candida tropicalis Z-04 optimization Plackett-Burman design response surface methodology

One-step Condensation/copolymerization of VTES and DVB for Self-assembly Bionic Superhydrophobic Surface Coating and Study on Oil-water Separation

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Journal of Bionic Engineering 2021年第3期18卷 559-573页

作者： Ruilong Zhang zhiping zhou Yi Wang Xiaohui Dai Li Chen Jiangdong Dai Research School of Polymeric Materials School of Materials Science and EngineeringJiangsu UniversityZhenjiang 2120133China State Key Laboratory of NBC Protection for Civilian Beijing 102205China Institute of Green Chemistry and Chemical Technology Advanced Chemical Engineering Laboratory of Green Materials and Energy of Jiangsu ProvinceSchool of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China

Mimicry of nature drives the development of bionic *** superhydrophobic materials are a kind of high-efficiency materials to handle oil spills and water ***,the stability of surface coatings of the superhydrophobic materials remains a ***,a new category of self-assembly bionic superhydrophobic surface coating was prepared via one-step condensation/copolymerization of vinyltriethoxysilane(VTES)and divinylbenzene(DVB),which realized the close combination of covalent bonds between organic(***)and inorganic matter(***),and avoided the swelling of polydivinylbenzene(PDVB)in the process of collection of oil from *** organic-inorganic hybrid polymer could self-assembly deposit on the surface of sponge even other *** example,P(VTES-DVB)-Si0_(2)/MS obtained by assembling P(VTES-DVB)-Si0_(2)on the surface of Melamine Sponge(MS)exhibited superhydrophobicity with a Water Contact Angle(WCA)of 157.3,the optimal adsorption capacity of 77 g g 136 g g-1 for diverse oils,and an excellent separation efficiency of 99.3%.Besides,the excellent acid and alkali resistance of P(VTES-DVB)-Si0_(2)/MS suggested the potential value in practical oil-water separation.P(VTES-DVB)-Si0_(2)showed the outstanding hydrophobic performance by using as coating on different *** work provided a new idea about the stable combination of organic and inorganic matter in the surface modification.

关键词： superhydrophobic surface coating oil-water separation condensation copolymerization self-assembly organic-inorganic hybridism

A real-time tunable arbitrary power ratios graphene based power divider

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Science China(Information Sciences) 2018年第8期61卷 104-106页

作者： Haowen SHU Yuansheng TAO Ming JIN Xingjun WANG zhiping zhou State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Engineering and Computer Science Peking University

Dear editor,Recently,photonics integrated circuits have attracted extensive consideration for its realization of large-scale integration of various devices and functionalities on a single chip[1].As a fundamental buil... 详细信息

关键词： Figure A real-time tunable arbitrary power ratios graphene based power divider length GOS

Robust,fluorine-free and superhydrophobic composite melamine sponge modified with dual silanized SiO_(2) microspheres for oil-water separation

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Chinese Journal of Chemical Engineering 2021年第5期34卷 50-60页

作者： Ruilong Zhang zhiping zhou Wenna Ge Yi Lu Tianshu Liu Wenming Yang Jiangdong Dai School of Material Science and Engineering Jiangsu UniversityZhenjiang 212013China Institute of Green Chemistry and Chemical Technology School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China School of Mechanical Engineering Dalian University of TechnologyDalian 116023China Entry-Exit Inspection Quarantine Bureau Zhenjiang 212008China

Massive oily wastewater discharged from industrial production and human daily life have been an urgent environmental and ecological *** materials have attracted tremendous attention due to their unique properties and potential applications in the treatment of *** this study,a novel superhydrophobic/superoleophilic composite melamine sponge modified with dual silanized SiO_(2) microspheres was fabricated simply by a two-step sol-gel method using vinyltriethoxysilane and hexadecyltrimethoxysilane as functional agent,which exhibited a water contact angle of 153.2°and a water sliding contact angle of 4.8°.Furthermore,the composite sponge showed the excellent oil adsorption performance and the compressive elasticity reaching up to 130 g·g^(-1) of dichloromethane and 33.1 kPa of compressive *** was worth noting that the composite sponge presented the excellent separation efficiency(up to 99.5%)in the processes of continuous oil/water *** robust superhydrophobic composite melamine sponge provided the possibility with the practical application for oil-water separation.

关键词： Superhydrophobic sponge Two-step sol-gel method Oil-water separation Dual silanized SiO_(2) microspheres

Silicon-based optoelectronics for general-purpose matrix computation:a review

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Advanced Photonics 2022年第4期4卷 1-13页

作者： Pengfei Xu zhiping zhou Peking University State Key Laboratory of Advanced Optical Communication Systems and NetworksSchool of ElectronicsBeijingChina Chinese Academy of Sciences Shanghai Institute of Optics and Fine MechanicsShanghaiChina

Conventional electronic processors,which are the mainstream and almost invincible hardware for computation,are approaching their limits in both computational power and energy efficiency,especially in large-scale matrix *** combining electronic,photonic,and optoelectronic devices and circuits together,silicon-based optoelectronic matrix computation has been demonstrating great capabilities and *** computation is one of the few general-purpose computations that have the potential to exceed the computation performance of digital logic circuits in energy efficiency,computational power,and ***,electronic processors also suffer from the tremendous energy consumption of the digital transceiver circuits during high-capacity data *** review the recent progress in photonic matrix computation,including matrix-vector multiplication,convolution,and multiply–accumulate operations in artificial neural networks,quantum information processing,combinatorial optimization,and compressed sensing,with particular attention paid to energy *** also summarize the advantages of siliconbased optoelectronic matrix computation in data interconnections and photonic-electronic integration over conventional optical computing *** toward the future of silicon-based optoelectronic matrix computations,we believe that silicon-based optoelectronics is a promising and comprehensive platform for disruptively improving general-purpose matrix computation performance in the post-Moore’s law era.

关键词： silicon-based optoelectronics photonic matrix computation optical interconnections photonic-electronic integration

Luminescence enhancement of CaMoO_(4):Eu^(3+) phosphor by charge compensation using microwave sintering method

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Journal of Advanced Ceramics 2015年第4期4卷 318-325页

作者： zhiping zhou Yingsen YU Xiaotang LIU Weihao YE Guangqi HU Bingfu LEI Yun YAN College of Materials and Energy South China Agricultural UniversityGuangzhou 510642China

CaMoO_(4):Eu^(3+)and CaMoO_(4):Eu^(3+),A+(A=Li,Na,K)phosphors for light-emitting diode(LED)applications have been prepared by microwave sintering method(MSM),and their structure and luminescence properties are *** influences of microwave reaction time and concentration of different kinds of charge compensation A+and Eu^(3+)on luminescence have also been *** samples emit a red luminescence at 615 nm attributed to the^(5)D0→^(7)F2 transition of Eu^(3+)under 464 nm *** is observed that adding charge compensation A+in the sample synthesis increases luminescence *** optimized sample made with 32 mol%Li+and 32 mol%Eu^(3+)has an enhancement factor of 4 in photoluminescence compared to the sample made without charge *** CIE(Commission Internationale de l'Eclairage)coordinates of Ca0.36MoO_(4):0.32Eu^(3+),0.32Li+are x=0.661 and y=0.339,which indicate that the obtained phosphor can be a promising red color candidate for white LED fabrications.

关键词： CaMoO4:Eu^(3+)phosphor luminescence enhancement charge compensation microwave sintering white light-emitting diode(LED)

Low-loss hybrid plasmonic TM-pass polarizer using polarization-dependent mode conversion

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Photonics Research 2020年第7期8卷 1197-1202页

作者： Ruixuan Chen Bowen Bai zhiping zhou State Key Laboratory of Advanced Optical Communication Systems and Networks Department of ElectronicsSchool of Electronics Engineering and Computer SciencePeking UniversityBeijing 100871China Peking University Shenzhen Research Institute Shenzhen 518057China Nano-optoelectronics Frontier Center of Ministry of Education Peking UniversityBeijing 100871China

A low-loss hybrid plasmonic transverse magnetic(TM)-pass polarizer has been demonstrated utilizing polarization-dependent mode *** advantage of the silicon hybrid plasmonic slot waveguide(HPSW),the unwanted transverse electric(TE)fundamental mode can be efficiently converted first to a TM higher-order mode and then suppressed by a power combiner,while the retained TM fundamental mode can pass through with negligible *** the HPSW feature both strong structural asymmetry and a small interaction area in the cross-section between the metal and optical field,the optimized insertion loss of the device is as low as 0.4 d *** the wavelength of 1550 nm,the extinction ratio is 28.3 d B with a moderate footprint of 2.38μm×10μ*** the entire C band,the average reflection of the TE mode is suppressed below-14 d B,and the extinction ratio is over 18.6 d *** work provides another more efficient and effective approach for better on-chip polarizers.

关键词： polarization polarizer pass

Flexible, thermal processable, self-healing, and fully bio-based starch plastics by constructing dynamic imine network

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Green Energy & Environment 2024年第10期9卷 1610-1618页

作者： Xiaoqian Zhang Haishan Zhang Guowen zhou zhiping Su Xiaohui Wang State Key Laboratory of Pulp and Paper Engineering South China University of Technology

The serious environmental threat caused by petroleum-based plastics has spurred more researches in developing substitutes from renewable *** is desirable for fabricating bioplastic due to its abundance and renewable ***,limitations such as brittleness,hydrophilicity,and thermal properties restrict its widespread *** overcome these issues,covalent adaptable network was constructed to fabricate a fully bio-based starch plastic with multiple advantages via Schiff base *** strategy endowed starch plastic with excellent thermal processability,as evidenced by a low glass transition temperature （Tg=20.15℃）.Through introducing Priamine with long carbon chains,the starch plastic demonstrated superior flexibility （elongation at break=45.2%） and waterproof capability （water contact angle=109.2°）.Besides,it possessed a good thermal stability and self-adaptability,as well as solvent resistance and chemical *** work provides a promising method to fabricate fully bio-based plastics as alternative to petroleum-based plastics.

关键词： Bioplastic Covalent adaptable networks Schiff base chemistry Thermal processability Self-healing