Fabrication of three-dimensional WO3/ZnWO4/ZnO multiphase heterojunction system with electron storage capability for significantly enhanced photoinduced cathodic protection performance. (10th November 2021)

• Record Type: Journal Article
• Authors: Feng, Chang; Chen, Zhuoyuan; Tian, Jing; Jing, Jiangping; Ma, Li; Hou, Jian
• Is Part Of: Journal of materials science & technology. Volume 90(2022)
• Page Start: 183
• Page End: 193
• Publication Date: 2021-11-10
• Subjects: WO3/ZnWO4/ZnO -- Multiphase-heterojunction photoelectrode -- Three-dimensional hierarchical structure -- Photoinduced cathodic protection -- Electron storage capacity; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2021.02.037
• Languages: English
• ISSNs: 1005-0302

Abstract

Highlights: A novel three-dimensional hierarchical WO3 /ZnWO4 /ZnO photoelectrode was prepared. The photoinduced CP performance of WO3 /ZnWO4 /ZnO is significantly improved. WO3 /ZnWO4 /ZnO has significantly enhanced electron storage capacity. The photoinduced CP mechanism of WO3 /ZnWO4 /ZnO are analyzed and proposed. Abstract: 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 multiphase-heterojunction 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 off the light, which can realize long-term and effective photoinduced CP. Graphical abstract: Image, graphical abstract