文献类型：期刊文献

英文题名：Oxygen Vacancy Defects and a Field Effect-Mediated ZnO/WO2.92 Heterojunction for Enhanced Corrosion Resistance

作者：Guo, Xiao-Jiao[1];Yang, Xiu[1];Yuan, Xiao-Yu[1];Zhou, Dan[1];Lu, Yi[1];Liu, Jin-Ku[1]

机构：[1]East China Univ Sci & Technol ECUST, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2021

卷号：60

期号：20

起止页码：15390

外文期刊名：INORGANIC CHEMISTRY

收录：;EI(收录号：20214211035560);WOS:【SCI-EXPANDED(收录号:WOS:000710270100041)】；

基金：This work was supported by the National Natural Science Foundation of China (grant 21878090) and the Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan Province (grant 2020CL04).

语种：英文

外文关键词：Heterojunctions - Corrosion protection - Oxygen vacancies - Surface plasmon resonance - Gas adsorption - Electron transport properties - Epoxy resins - Electric fields - II-VI semiconductors - Photoelectricity - Corrosion rate

摘要：The heterojunction constructed by tungsten oxide and zinc oxide materials can improve the problem of easy deactivation of electrons, which is a new and effective strategy for realizing anticorrosion. Here, the ZnO/WO2.92 heterojunction modified by oxygen vacancies (OVs) serving as the photoelectric conversion center was not consumed to provide continuous light-induced protection for steel, and the impedance value was increased by 185.35% compared to that of epoxy resin after 72 h of corrosion. The enhanced anticorrosion activity was due to OV modification leading to oxygen adsorption and electron capture, which inhibited the cathodic corrosion reaction and effectively hindered electron transport. Additionally, the localized surface plasmon resonance effect produced by OVs improved light utilization efficiency and increased electron density, which enabled numerous photoelectrons to gather on the surface of the iron substrate to reduce the corrosion rate of metals. Besides, the cascade effect of the ZnO/WO2.92 heterojunction promoted the transfer of e(-)/h(+) to form an electric field that allowed the directional flow of electrons to inhibit the anode dissolution process. Thus, exploring the corrosion reaction involving OVs and heterojunction structures was of great significance to the development of nonsacrificial and efficient anticorrosion materials.