Journal
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
Volume 90, Issue -, Pages 183-193Publisher
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2021.02.037
Keywords
WO3/ZnWO4/ZnO; Multiphase-heterojunction photoelectrode; Three-dimensional hierarchical structure; Photoinduced cathodic protection; Electron storage capacity
Funding
- National Natural Science Foundation of China [41976036]
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI) [KF190408, KF190404]
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A novel three-dimensional hierarchical WO3 photoelectrode was prepared by solvothermal method, and a WO3/ZnWO4/ZnO multiphase heterojunction photoelectrode was obtained through annealing treatment, showing significantly improved photoinduced cathodic protection and electron storage capacity in a 3.5% NaCl solution without the need for a hole scavenger. The electron storage capacity of the heterojunction enables long-term and effective photoinduced cathodic protection of metallic materials even in the dark.
A novel three-dimensional hierarchical WO3 photoelectrode was prepared by solvothermal method, and ZnO was deposited on its surface by electrochemical method. The WO3/ZnWO4/ZnO multiphaseheterojunction photoelectrode was prepared by further annealing treatment to explore the photoinduced cathodic protection (CP) performance. Compared with WO3 and ZnO, the photoinduced CP and electron storage capacity performance of WO3/ZnWO4/ZnO is significantly improved in 3.5% NaCl solution without adding any hole scavenger. The electron storage capacity of the WO3/ZnWO4/ZnO heterojunction makes it possible to continuously protect metallic materials in the dark after switching offthe light, which can realize long-term and effective photoinduced CP. (C) 2021 Published by Elsevier Ltd on behalf of Chinese Society for Metals.
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