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Plasma Science and Technology 2019年第5期21卷 23-33页

作者： Fubao JIN Yuanxiang ZHOU Bin LIANG Xidong LIANG Zhongliu ZHOU Ling ZHANG Key Laboratory of Plateau Ecology and Agriculture College of Agriculture and Animal HusbandrySchool of Water Resources and Electric PowerQinghai UniversityXining 800016People's Republic of China State Key Lab of Control and Simulation of Power Systems and Gen eration Equipments Departme nl of Electrical EngineeringTsinghua UniversityBeijing 100084People's Republic of China

The physicochemical properties and creepage discharge characteristics of aged high temperature Vulca nized(HTV)silicone rubber materials were investigated by ultraviolet radiati on(uv)aging method in this *** experimental results show that as the aging time increases,the creepage discharge flashover voltage increases first and then *** the aging time has little effect on the creepage discharge inception *** the aging time prolonged,the discharge endurance time of HTV silicone rubber is shortened,and the creepage discharge development velocity is *** the short time of applying voltage to aging material,the magnitude of discharge in creases *** to the partial discharge characteristic parameters of creepage discharge,the whole creepage discharge process is partitioned into four *** with unaged HTV silicone rubber,the aged HTV silicone rubber has less fluctuation in performance parameters and a clear *** study found that uv aging not only affects the physicochemical and hydrophobic properties of the HTV silicone rubber,but also accelerates the development of creepage discharge under AC voltage.

关键词： high temperature vulcanized silicone rubber creepage discharge uv aging inception voltage flashover voltage high altitude characteristic parameters

Improved Photoresponse of uv Photodetectors by the Incorporation of Plasmonic Nanoparticles on Ga N Through the Resonant Coupling of Localized Surface Plasmon Resonance

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Nano-Micro Letters 2020年第7期12卷 175-190页

作者： Sundar Kunwar Sanchaya Pandit Jae-Hun Jeong Jihoon Lee Department of Electronic Engineering College of Electronics and InformationKwangwoon University

Very small metallic nanostructures,i.e.,plasmonic nanoparticles(NPs),can demonstrate the localized surface plasmon resonance(LSPR)e ect,a characteristic of the strong light absorption,scattering and localized electromagnetic field via the collective oscillation of surface electrons upon on the excitation by the incident *** LSPR of plasmonic NPs can significantly improve the photoresponse of the *** this work,significantly enhanced photoresponse of uv photodetectors is demonstrated by the incorporation of various plasmonic NPs in the detector *** size and elemental composition of monometallic Ag and Au NPs,as well as bimetallic alloy Ag Au NPs,are fabricated on Ga N(0001)by the solid-state dewetting *** photoresponse of various NPs are tailored based on the geometric and elemental evolution of NPs,resulting in the highly enhanced photoresponsivity of 112 A W-1,detectivity of 2.4×1012 Jones and external quantum e ciency of 3.6×104%with the high Ag percentage of Ag Au alloy NPs at a low bias of 0.1 *** Ag Au alloy NP detector also demonstrates a fast photoresponse with the relatively short rise and fall time of less than 160 and 630 ms,*** improved photoresponse with the Ag Au alloy NPs is correlated with the simultaneous e ect of strong plasmon absorption and scattering,increased injection of hot electrons into the Ga N conduction band and reduced barrier height at the alloy NPs/Ga N interface.

关键词： uv photodetection NP-based photodetectors Nanoparticles Plasmonic enhancement

Enhanced dewaterability of waste activated sludge by uv assisted ZVI-PDS oxidation

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Journal of Environmental Sciences 2022年第3期34卷 152-164页

作者： Yanping Zhang Tiantian Li Jiayu Tian Huichun Zhang Fen Li Jiahua Pei School of Civil Engineering and Transportation Hebei University of TechnologyTianjin 300401China Department of Civil and Environmental Engineering Case Western Reserve UniversityClevelandOH 44106USA College of Chemical and Environmental Engineering Harbin University of Science and TechnologyHarbin 150000China

Ultraviolet(uv)assisted zero-valent iron(ZVI)-activated sodium persulfate(PDS)oxidation(uv-ZVI-PDS)was used to treat waste activated sludge(WAS)in this *** dewaterability performance and mechanism of WAS dewatering were *** results showed that uv-ZVI-PDS can obtain better sludge dewatering performance in a wide pH range(2.0-8.0).When the molar ratio of ZVI/PDS was 0.6,uv was 254nm,PDS dosage was 200 mg/g TS(total solid),pH was 6.54,reaction time was 20 min,the CST(capillary suction time)and SRF(specific resistance to filtration)were decreased by 64.0%and 78.2%,*** molar ratio of ZVI/PDS used in this paper is much lower than that of literatures,and the contents of total Fe and Fe^(2+) in sludge supernatant remained at a low level,as 3.7 mg/L and 0.0 mg/*** analysis of extracellular polymeric substances(EPS),scanning electron microscope(SEM)and particle size distribution showed that the EPS could be effectively destroyed by uv-ZVI-PDS,the sludge flocs broken down into smaller particles,cracks and holes appeared,and then the bound water was *** the same time,the highly hydrophilic tightly bound-EPS(TB-EPS)were converted into loosely bound EPS(LB-EPS)and soluble EPS(S-EPS).During sludge pretreated by uv-ZVI-PDS,positively charged ions,such as Fe^(2+),Fe^(3+) and H^(+),produced in the reaction system could reduce the electronegativity of sludge surface,promote sludge particles aggregation,and then enhanced the sludge dewaterability.

关键词： Sludge dewatering Persulfate Zero-valent iron uv Extracellular polymeric substances

Effect of fabrication temperature on the manufacturability of lateral ZnO nanowire array uv sensor

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Science China(Technological Sciences) 2020年第4期63卷 668-674页

作者： ZHAO LiHuan GAO ZhiYuan ZHANG Jie LU LiWei LI HongDa Key Laboratory of Opto-electronics Technology Microelectronic SchoolBeijing University of TechnologyBeijing 100124China Institute of Microelectronics of Chinese Academy of Sciences Beijing 100029China

Fabrication temperature is an important factor affecting the manufacturability of electronic devices,especially for the bottom-up self-assembled *** this study,we used a lateral-bridged zinc oxide(ZnO)nanowire array uv sensor as a model to investigate the influence of temperature on device performance over the entire manufacturing process,from sensor fabrication to *** found that annealing of the SiO2 substrate would make ZnO seed layer on top of it more compact and uniform,and hence improve the lateral orientation and uniformity of ZnO nanowires grown from the seed *** the annealed substrate,the light-to-dark current ratio increased by two orders of *** the contrary,annealing the ZnO seed layer would deteriorate the light-to-dark current ratio of the sensor,because annealing caused most of the grains in the seed layer to become vertically aligned,which in turn affected the lateral growth of ZnO nanowire *** the packaging process,the surface structure of ZnO nanowires would change if the chip welded at a temperature of 230℃for 2 min,resulting in a decrease of light-to-dark current ratio by three orders of magnitude.

关键词： fabrication temperature manufacturability ZnO nanowire uv sensor

Photodegradation of 2-(2-hydroxy-5-methylphenyl) benzotriazole(uv-P) in coastal seawaters: Important role of DOM

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Journal of Environmental Sciences 2019年第11期31卷 129-137页

作者： Xi Chen Jieqiong Wang Jingwen Chen Chengzhi Zhou Feifei Cui Guoxin Sun Key Laboratory of Industrial Ecology and Environmental Engineering (MOE) School of Environmental Science and Technology Dalian University of Technology

Benzotriazole uv stabilizers (BT-uvs) have attracted concems due to their ubiquitous occurrence in the aquatic environment,and their bioaccumulative and toxic ***,little is known about their aquatic environmental degradation *** this study,photodegradation of a representative of BT-uvs,2-(2-hydroxy-5-methylphenyl) benzotriazole (uv-P),was investigated under simulated sunlight *** show that uv-P photodegrades slower under neutral conditions (neutral form) than under acidic or alkaline conditions (cationic and anionic forms).Indirect photodegradation is a dominant elimination pathway of uv-P in coastal *** organic matter (DOM) from seawaters accelerate the photodegradation rates mainly through excited triplet DOM (3DOM*),and the roles of singlet oxygen and hydroxyl radical are negligible in the *** from seawaters impacted by mariculture exhibits higher steady-state concentration of 3DOM*([3DOM*]) relative to those from pristine seawaters,leading to higher photosensitizing effects on the *** ions inhibit the DOM-sensitized photodegradation of uv-P by decreasing [3DOM*].Photodegradation half-lives of uv-P are estimated to range from 24.38 to 49.66 hr in field water bodies of the Yellow River *** results are of importance for assessing environmental fate and risk uv-P in coastal water bodies.

关键词： Benzotriazole uv stabilizers Photodegradation Dissolved organic matter Coastal seawaters

uv difference spectra and electrophoresis of recombination of lanthanides and calmodulin

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Chinese Science Bulletin 1996年第22期41卷 1905-1911页

作者：陈旭周玉祥徐育敏 State Key Laboratory of Biomembrane and Biomembrane Engineering Department of Biological Sciences and Biotechnology Tsinghua University Beijing 100084 China

The studies of the effects of lanthanides on biological system show that lanthanides(Ln3+)can facilitate growth of crops and increase their ***,Ln3+ is toxicto some animal tissues,although the reaction mechanism of Ln3+ in biological system isnot *** roles of Ln3+ in living system may be related to the competition withCa2+.Calmodulin（CaM）,an ubiquitous Ca2+-binding protein that mediates

关键词： lanthanide calmodulin uv difference spectra.

Influence of uv-Irradiation on Latent Tracks in Polyethylene Terephthalate Films

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Chinese Physics Letters 2016年第1期33卷 100-103页

作者：文琪王鹏飞凌云汪茂闫东晓曹兴忠王宝义王宇钢 State Key Laboratory of Nut/ear Physics and Technology Peking University Beijing 100871 Key Laboratory of Nuclear Radiation and Nuclear Energy Technology Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049

Polyethylene terephthalate （PET） films in thickness of 12 μm are irradiated by Xe and Au ions at the energies of 9.5 and 11.4MeV/u and with the ion fluence from 5 × 10^9 cm^-2 to 1×10^11 cm^-2. After irradiation, ultra-violet lights are used to illuminate the samples with latent tracks at the wavelength of 365nm with flux density of 4.2mW/cm^-2. uv-irradiation effects on tracked PET are investigated by the uv-vis spectrum and positron annihilation lifetime spectroscopy （PALS）. It is found that carbonaceous clusters in PET films are generated by ion irradiation and decomposed with uv illumination by calculating the optical energy band gap Eg in the uv-vis spectrum. The free volumes behave differently in track and bulk after uv illumination. In our experiment, the PALS results show an increase in radius and density of free volume in tracked PET films after uv treatment, which indicates an expansion in radius of latent tracks.

关键词： of in uv that PET on been is

Optical Field Confinement Enhanced Single ZnO Microrod uv Photodetector

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Chinese Physics Letters 2017年第7期34卷 283-286页

作者：魏铭徐春祥秦飞飞 Arumugam Gowri Manohari 卢俊峰祝秋香 State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Nanjing 210096

ZnO microrods are synthesized using the vapor phase transport method, and the magnetron sputtering is used to decorate the A1 nanoparticles （NPs） on a single ZnO microrod. The micro-PL and I-V responses are measured before and after the decoration orAl NPs. The FDTD stimulation is also carried out to demonstrate the optical field distribution around the decoration of Al NPs on the surface of a ZnO microrod. Due to an implementation of AI NPs, the ZnO microrod exhibits an improved photoresponse behavior. In addition, AI NPs induced localized surface plasmons （LSPs） as well as improved optical field confinement can be ascribed to an enhancement of ultraviolet （uv） response. This research provides a method for improving the responsivity of photodetectors.

关键词： ZnO Optical Field Confinement Enhanced Single ZnO Microrod uv Photodetector uv

Durability of Ultra-Thin Silver Films and Silver-Gold Alloy Films under uv Irradiation

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Chinese Physics Letters 2016年第10期33卷 124-127页

作者：周明蔡渊李耀鹏刘定权 Shanghai Institute of Technical Physics Chinese Academy of Sciences School of Physical Science and Technology Shanghai Tech University

Silver films fag） and silver-gold films （Ag-A u） with thickness -15 nm are coated on Bk 7 glasses through thermal evaporation. After doping gold of 5.2%, the grain size of the Ag film reduces from 13.6nm to 9.1 nm, also the surface roughness decreases from 1.45nm to 0.94nm. A uv lamp is used as the irradiation light source to accelerate the corrosion process in the atmosphere. After 17h irradiation, the pure silver film surface turns dark, and the transmittances reduce from 35Onto to 500nm, while the Ag-Au film degrades much less, almost negligibly after uv radiation. Additional x-ray photoelectron spectroscopy and atomic force micrographs data are provided to show atomic content of films and their surface morphologies. It is suggested that small grain size and high packing density of alloy film prevent reaction of silver with oxygen in the atmosphere, which leads to high stability of the Ag-Au film.

关键词： Ag in of nm uv

Effective Removal of Tetracycline by Using Biochar Supported Fe3O4 as a uv-Fenton Catalyst

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Chemical Research in Chinese Universities 2019年第1期35卷 79-84页

作者： YU Xiaodan LIN Xinchen LI Weiguang FENG Wei School of Environment Harbin Institute of TechnologyHarbin 150090P.R.China Key Labroratory of Songliao Aquatic Environnmento Ministry of Education Jilin Jianzhu UniversityChangchun 130118P.R.China Key Laboratory of Groundwater Resource and Environment Ministry Education College of Environment and ResourcesJilin UniversityChangehun 130021P.R.China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090.P.R.China

Novel Fe3O4-decorate hierarchical porous carbon skeleton derived from maize straw(Fe3O4@MSC)was synthesized by a facile co-precipitation process and a calcination process,which was developed as a uv assisted heterogeneous Fenton-like *** as-synthesized catalysts were characterized via X-ray powder diffraction(XRD), scanning electron microscope(SEM),transmission electron microscope(TEM),Brunauer-Emmet-Teller(BET)and vibrating sample magnetometer(VSM)at room *** morphology and structure analysis revealed that the as-prepared Fe3O4@MSC retained the original pore morphology of the maize straw *** non-uniform poly- hedral Fe3O4 grew on the whole surface of the MSC,which reduced the aggragation of Fe3O4 and provided more active sites to strengthen the uv-assisted Fenton-like *** a result,the tetracycline(TC)degradation efficiency after 40 min reaction and total organic carbon(TOC)removal efficiency after 2 h reaction of Fe3O4@MSC catalyzing uv-Fenton system reached 99.2%and 72.1%,respectively,which were more substantial than those of Fe3O4@MSC/H2O2(31.5%and 2%),uv/H2O2 system(68%and 23.4%)and uv/Fe3O4/H2O2(80% and 37.5%).The electron spin resonance(ESR)results showed that the ·OH played an important role in the catalytic reaction.A possible degradation pathway of TC was proposed on the basis of the identified ***,the uv assisted heterogeneous Fenton-like process in Fe3O4@MSC improved the cycle of Fe^3+/Fe^2+ and activated the interfacial catalytic site,which eventually realized the enhancement of degradation and mineralization to tetracycline.

关键词： Fe3O4 Carbon skeleton of maize straw,Heterogeneous Fenton-like catalyst uv irradiation Degradation of tetracycline