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photo-assisted Deposited Titanium Dioxide Film and the Enhancement of Its photocatalytic Water Splitting Activity

Chinese Journal of Structural Chemistry 2021年第9期40卷 1223-1230,1111页

作者：徐超胜吕佩文 Fuzhou University College of Chemical EngineeringFuzhou 350116China Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

photo-assisted deposited method is often employed in the metal-organic chemical vapor deposition whose ion source is organic compounds. It has been proved to increase the deposition rate and improve the crystallinity of the films. We demonstrate a photo-assisted sputtering deposited method which is used to prepare high quality TiO_(2) films. The crystallinity of the films is improved by the photo assistance without changing the morphology. And the structural and optical properties remain the same. The photo-assisted deposited TiO_(2) film shows a H_(2) evolution rate of 1.62 μmol·cm^(-2)·h^(-1) that is about twice more than that of the pristine TiO_(2) film. It is found the Mott-Schottky effect responds for the photocatalytic activity. photo-assisted deposited films show an enhanced photocatalytic activity due to the reduction of interface recombination and the high efficiency in the transferring of photo-generated carriers.

关键词： TiO_(2) photo-assisted Mott-Schottky photocatalyst

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photo-assisted electrochemical hydrogen evolution by plasmonic Ag nanoparticle/nanorod heterogeneity

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InfoMat 2019年第3期1卷 417-425页

作者： Hao Wu Husam N.Alshareef Ting Zhu Department of Electrical and Computer Engineering National University of SingaporeSingaporeSingapore Materials Science and Engineering Physical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)ThuwalSaudi Arabia School of Materials Science and Engineering Central South UniversityChangshaChina

Transition metal sulfide-based hydrogen evolution electrocatalysts still lag in catalytic activity due to the zero-deviated free energy of*H *** metals bridge the gap between light utilization and plasmon-mediated redox reactions for substantially enhanced electrocatalytic *** this work,a strategic broadband light utilization heterostructure,composed of two distinct Ag nanostructures(discontinuous Ag nanorods and monodispersed nanoparticles),is achieved through in situ sulfurization and metal *** heterostructure benefits the electrocatalytic hydrogen evolution reactivity thanks to the localized surface plasmon resonance induced hot electrons injection and inter-gap electric fields revealed by the finite-difference time-domain ***,the prudent heterostructured catalyst exhibits a significantly improved overpotential(at 10 mA cm−2)from 151 to 95 mV along with a Tafel slope from 74 to 45 mV dec−1 toward hydrogen ***,this instructional study sheds light on the design of hybrid photo-assisted electrocatalysts with cooperative effect of solar energy toward sustainable electrocatalysis.

关键词： hydrogen evolution interface photo-assisted plasmonic

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Two-dimensional TiO_(2)(001)nanosheets as an effective photo-assisted recyclable sensor for the electrochemical detection of bisphenol A

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Chinese Chemical Letters 2020年第10期31卷 2839-2842页

作者： Sujuan Hu Yingjian Yu Yu Guan Yanhuan Li Baoling Wang Mingshan Zhu School of Chemistry and Chemical Engineering Kunming UniversityKunming 650214China School of Environment Jinan UniversityGuangzhou 510632China Department of Physics Science and Technology Kunming UniversityKunming 650214China Yunnan Engineering Technology Research Center for Plastic Films Kunming UniversityKunming 650214China

Electrochemical detection is an efficient method for the detection of Bisphenol A(BPA).Herein,a sensitive photo-electrochemical sensor based on two-dimensional(2 D)TiO_(2)(001)nanosheets was fabricated and then used for BPA electrochemical *** light irradiation,the 2 D TiO_(2)(001)nanosheets electrode provided a lower detection limit of BPA detection compared with an ambient electrochemical *** low detection limit is^5.37 nmol/L(S/N=3).Furthermore,profiting from the photoelectric characteristics,the 2 D TiO_(2)(001)nanosheets electrode exhibits a nice regeneration prope *** 45 min of light irradiation,the electrochemical signal was regenerated from14.7%to 82.9%of the original signal at the 6th *** is attributed to the non-selective·OH mediation produced by the 2 D TiO_(2)(001)nanosheets mineralizing anodic polymeric products and resuming surface reactive *** investigation indicates that photo-assistance is an efficient method to improve the electrochemical sensor for detecting BPA in water environments.

关键词： TiO_(2)(001)nanosheets Bisphenol A Electrochemical detection Recyclable photo-assisted

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External field–assisted batteries toward performance improvement

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SusMat 2023年第2期3卷 146-159页

作者： Wanwan Wang Yi-Chun Lu Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)Singapore Electrochemical Energy and Interfaces Laboratory Department of Mechanical and Automation EngineeringThe Chinese University of Hong KongShatinHong Kong SARChina

Rechargeable batteries are essential for the increased demand for energy storage technologies due to their ability to adapt intermittent renewable energies into electric devices,such as electric *** boost the battery performance,applying external fields to assist the electrochemical process has been developed and exhibits significant merits in energy efficiency and cycle stability *** perspective focuses on recent advances in the development of external field–assisted battery technologies,including photo-assisted,magnetic field–assisted,sound field–assisted,and multiple field–*** workingmechanisms of external field–assisted batteries and their challenges and opportunities are highlighted.

关键词： external field magnetic field-assisted mechanism photo-assisted rechargeable battery

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Method of evaluating interface traps in Al2O3/AlGaN/GaN high electron mobility transistors

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Chinese Physics B 2019年第6期28卷 378-383页

作者：包斯琴高娃马晓华陈伟伟杨凌侯斌朱青祝杰杰郝跃 School of Advanced Materials and Nanotechnology Xidian UniversityXi’an 710071China Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices School of MicroelectronicsXidian UniversityXi’an 710071China School of Science Inner Mongolia University of TechnologyHohhot 010051China 4China Academy of Space Technology(Xi’an)Xi’an 710071China

In this paper, the interface states of the AlGaN/GaN metal–insulator–semiconductor(MIS) high electron mobility transistors(HEMTs) with an Al2 O3 gate dielectric are systematically evaluated. By frequency-dependent capacitance and conductance measurements, trap density and time constant at Al2 O3/AlGaN and AlGaN/GaN interface are *** experimental results reveal that the density of trap states and the activation energy at the Al2 O3/AlGaN interface are much higher than at the AlGaN/GaN interface. The photo-assisted capacitance-voltage measurements are performed to characterize the deep-level traps located near mid-gap at the Al2 O3/AlGaN interface, which indicates that a density of deep-level traps is lower than the density of the shallow-level states.

关键词： AlGaN/GaN HEMTs interface traps frequency-dependent C–V measurements photo-assisted C–V measurements

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