High-efficiency photoelectrochemical cathodic protection performance of the TiO2/AgInSe2/In2Se3 multijunction nanosheet array. (November 2020)

• Record Type: Journal Article
• Authors: Jiang, Xuhong; Sun, Mengmeng; Chen, Zhuoyuan; Jing, Jiangping; Feng, Chang
• Is Part Of: Corrosion science. Volume 176(2020)
• Publication Date: 2020-11
• Subjects: A. AgInSe2/In2Se3 nanoparticles -- A. Multijunctions -- A. TiO2 nanosheet array -- C. Photoelectrochemical conversion performance -- C. Photoelectrochemical cathodic protection performance; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2020.108901
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Vertically-aligned 2D TiO2 nanosheets array (NSA) substrate was prepared. The TiO2 NSA/AgInSe2 /In2 Se3 multijunction system was prepared. TiO2 NSA/AgInSe2 /In2 Se3 promotes the separation of photoinduced carriers. TiO2 NSA/AgInSe2 /In2 Se3 exhibits the enhanced PEC performance. TiO2 NSA/AgInSe2 /In2 Se3 exhibits efficient PECCP performance for 316 L SS. Abstract: Optimization of multijunction photoelectric conversion materials with a much negative band potential is very important for improving the photoelectric conversion and photoelectrochemical cathodic protection performance because the well-matched multijunction can assist the fast transport of photogenerated electrons. In this paper, a "green" AgInSe2 /In2 Se3 sensitized TiO2 nanosheet array (NSA) photoanode was prepared. Vertically-grown two-dimensional TiO2 NSA with the multijunction of TiO2 NSA/AgInSe2 (7)/In2 Se3 (3) improves the separation efficiency and the transfer of photoinduced charge carriers compared with single AgInSe2 sensitized TiO2 NSA. The TiO2 NSA/AgInSe2 /In2 Se3 photoanode achieves highly efficient photoelectrochemical cathodic protection performance for 316LSS in NaCl solution under AM1.5 light illumination.