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论文类型：期刊论文

发表时间：2017-12-01

发表刊物：MOLECULAR CATALYSIS

收录刊物：SCIE、EI、Scopus

卷号：442

页面范围：97-106

ISSN号：2468-8231

关键字：TiO2 nanotube; Transient photovoltage; Electron spinning resonance; Photoelectrochemical property

摘要：The AgInS2/TiO2 nanotube array electrodes were successfully prepared by depositing AgInS2 nanopartides onto well-aligned anodized TiO2 NTs via an ultrasonic-assisted successive ionic layer absorption and reaction (SILAR) method. The microscopic morphology, composition and interfacial structure were well characterized with field-emission scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectra and transmission electron microscopy. The optical property was investigated by UV-vis diffusion reflection spectra. Photoluminescence investigation demonstrated that the constructed heterojunctions reduced the recombination rate of photoinduced charges in the composite. Furthermore, transient photovoltage technique revealed that AgInS2/TiO2 NTs electrode had high separation efficiency of photoinduced electrons and holes. Finally, the composite electrode was tested by degradation of Norfloxacin (NOR) under simulated solar irradiation. Electron spinning resonance study indicated that O-2 species played an essential role for efficient NOR photodegradation. The higher photoelectrochemical performance of AgInS2/TiO2 NTs electrode could be attributed to the finely deposited AgInS2 nanoparticles, which improved the light adsorption and facilitated the charge transfer. (C) 2017 Elsevier B.V. All rights reserved.