Abstract
Highly ordered Ag2S/ZnS/ZnO nanorod array film photoanodes were prepared on a Ti substrate for photocathodic cathodic protection. The results indicated that the photoresponse range of the Ag2S/ZnS/ZnO composite film was extended compared to those of the ZnO and ZnS/ZnO films, indicating its higher light absorption capacity. When the Ag2S/ZnS/ZnO composite film served as a photoanode, the film can provide the best effective photocathodic protection for 304 stainless steel in a 3.5 wt% NaCl solution under white light illumination compared to the ZnO and ZnS/ZnO films. Additionally, in comparison to pure ZnO film, the photocurrent for the ZnS/ZnO film remained the same without noticeable fluctuation after illumination for 1 h, indicating that the ZnS functionalization improved the stability by overcoming the photocorrosion effect of the ZnO photoanode under light irradiation.
Published Version
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