Enhanced photoelectrochemical protection of 304 stainless steel induced by the internal electric field effect of a g-C3N4/graphene/TiO2 Z-scheme system

被引：7
作者：
Zhang, Weiwei [1 ]
Tao, Xianchao [1 ]
Guo, Hanlin [2 ]
Ding, Jianxu [1 ]
Sun, Haiqing [1 ]
Zhan, Xiaoyuan [1 ]
机构：
[1] Shandong Univ Sci & Technol, Coll Mat & Engn, Qingdao 266590, Shandong, Peoples R China
[2] Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, 266 Fangzheng Ave, Chongqing 400714, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2023年 / 164卷
基金：
中国国家自然科学基金;
关键词：
semiconductors; interfaces;   electrochemical properties; PHOTOCATALYTIC DEGRADATION; PERFORMANCE; NANOSHEETS; HETEROJUNCTION; MICROSPHERES; TRANSPORT;
D O I：
10.1016/j.materresbull.2023.112283
中图分类号：
T [工业技术];
学科分类号：
08 ;
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.
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页数：7
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