标题：Enhanced visible light-driven activity of TiO2nanotube array photoanode co-sensitized by “green” AgInS2photosensitizer and In2S3buffer layer
作者：Sun, Mengmeng ;Chen, Zhuoyuan ;Li, Jiarun ;Hou, Jian ;Xu, Fengling ;Xu, Likun ;Zeng, Rongchang
作者机构：[Sun, Mengmeng ;Chen, Zhuoyuan ;Li, Jiarun ] Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academ 更多
摘要：The AgInS2/In2S3nanoparticles (NPs) co-sensitized TiO2nanotube array (NTA) photoanodes with high photoelectrochemical (PEC) conversion efficiency are prepared and optimized. The In2S3buffer layer around AgInS2absorber layer significantly improves the charge generation/separation efficiency of the prepared photoanode. Compared with single AgInS2NPs sensitized TiO2NTAs, the design of the AgInS2/In2S3heterojunction NPs sensitized TiO2NTAs further promotes the charge transfer in the system, and avoids the unmatched energy band alignment between AgInS2and TiO2. The AgInS2(3)/In2S3(5) NPs co-sensitized TiO2NTAs possess the best PEC conversion performance. The AgInS2and In2S3NPs distribute uniformly on TiO2NTAs to form close interfacial adhesion. Simultaneously, the one-dimensional TiO2nanotubes serve as the direct electron pathways and ensure the rapid collection of charge carriers generated by the system. Moreover, due to the more negative Fermi levels and energy band potentials of AgInS2and In2S3, the prepared TiO2NTA/AgInS2(3)/In2S3(5) photoanode also exhibits an excellent PEC cathodic protection performance for 316L stainless steel in NaCl solution.
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