Li H, Yang Z, Cui X, Li Y, Zhang P, Li J. A highly efficient In
2S
3/Ag
2S/TiO
2NTAs photoelectrodes for photocathodic protection of Q235 carbon steel under visible light.
Nanotechnology 2022;
34:045705. [PMID:
36301697 DOI:
10.1088/1361-6528/ac9da8]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 10/26/2022] [Indexed: 06/16/2023]
Abstract
A novel In2S3/Ag2S/TiO2nanotube arrays (NTAs) was successfully fabricated by successive ionic layer adsorption and reaction method and electrochemical anodic oxidation method, and served as photoanode for photocathodic protection application. The micromorphologies, optical absorption properties, crystalline structure and elemental valence states of the composites were performed by field emission scanning electron microscopy, high resolution transmission electron microscope, UV-vis diffuse reflectance absorption spectra, x-ray diffractometer and x-ray photoelectron spectroscopy, respectively. The photocathodic protection performances of In2S3/Ag2S/TiO2NTAs on the Q235 carbon steel (CS) were also studied. The In2S3/Ag2S/TiO2nanocomposites show better photoelectrocatalytic and photocathodic protection performance than pure TiO2NTAs. The photocurrent density of In2S3(9)/Ag2S(8)/TiO2photoelectrode coupled with Q235 CS reach 211μA cm-2, which is about 4.5 times higher than that of TiO2NTAs. The photogenerated potential of Q235 CS coupled to In2S3(9)/Ag2S(8)/TiO2under illumination shows a negative shift to -0.92 V versus SCE. Results indicate that the co-sensitization of In2S3and Ag2S could extend the light absorption of TiO2to the visible light range and enhance its photoelectric conversion efficiency.
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