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Enhanced photoelectrochemical protection of 304 stainless steel induced by the internal electric field effect of a g-C3N4/graphene/TiO2 Z-scheme system
Zhang, Weiwei1; Tao, Xianchao1; Guo, Hanlin2; Ding, Jianxu1; Sun, Haiqing1; Zhan, Xiaoyuan1
2023-08-01
摘要Photo-generated cathodic protection by TiO2-based semiconductors has attracted considerable attentions for non-sacrificial and environment-friendly characteristics. A ternary g-C3N4/graphene/TiO2 composite was constructed by a one-step hydrothermal method in the work. The 2D nanosheets and the TiO2 nanoparticles are closely coexisting with each other to form a wrapping structure. An internal electric field formed in the heterosemiconductor junction for matched band structure and insufficient oxidation ability of g-C3N4. This resulted that the electrons transfer in a Z-scheme mechanism, which was confirmed by Mott-Schottky and EIS analysis. The Z-scheme system pushed photo-excited electrons to a high energy potential that boosted electron migration from photoelectrode to the connected metal, leading to novel photoelectrochemical performance and enhanced photoelectrochemical corrosion protection of 304 stainless steel.
关键词semiconductors interfaces   electrochemical properties
DOI10.1016/j.materresbull.2023.112283
发表期刊MATERIALS RESEARCH BULLETIN
ISSN0025-5408
卷号164页码:7
通讯作者Zhang, Weiwei(zhww@sdust.edu.cn)
收录类别SCI
WOS记录号WOS:000986057500001
语种英语