Dual-function photoelectrode of TiO_(2)nanotube array/CdZnS/ZnS heterojunction for efficient photoelectrochemical cathodic protection and anti-biofouling  

作　　者：Feng Qian Jing Tian Chongqing Guo Li Liu Shiqiang Chen Jiarun Li Ning Wang Lei Wang 

机构地区：[1]School of Environment and Safety Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [2]Institute of Marine Science and Technology,Shandong University,Qingdao 266237,China [3]Key Laboratory of Marine Environmental Corrosion and Bio-fouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China [4]College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,China

出　　处：《Journal of Materials Science & Technology》2024年第22期25-36,共12页材料科学技术（英文版）

基　　金：financially supported by the Natural Science Foundation of Shandong(No.ZR2021MD002);the National Natural Science Foundation of China(Nos.42106051 and U2106206).

摘　　要：The low photoelectric conversion efficiency of photoelectrode is an important factor that limits the application in photoelectrochemical cathodic protection(PECCP)field for marine anti-corrosion of metallic structures.In this work,a photoelectrode of TiO_(2)/CdZnS/ZnS triple-phase heterojunction was fabricated by loading the narrow-band CdZnS associated with the broad-band ZnS via hydrothermal and continuous ion layer adsorption methods,respectively.The composite of CdZnS enhances the photoelectric conversion ability of TiO_(2),while the ZnS composite can prevent the CdZnS from photo-corrosion and suppress the spillover of the photogenerated electrons.The three-phase heterostructure effectively improves the PECCP performance on 316 L stainless steel(SS)under simulated solar irradiation,especially in 3.5 wt%NaCl solution without the sacrificial agent.In addition,the prepared TiO_(2)/CdZnS/ZnS photoelectrode also performs anti-biofouling effect evidenced by the high removal efficiency of Pseudomonas aeruginosa(P.aeruginosa),which can be attributed to the oxidizability of photogenerated holes.The TiO_(2)/CdZnS/ZnS triple-phase heterojunction with desirable performance is a promising semiconductor material for the applications of PECCP and anti-biofouling.

关 键 词：Photoelectrochemical cathodic protection Anti-corrosion TiO_(2)/CdZnS/ZnS Anti-biofouling P.aeruginosa 

分 类 号：TG174.41[金属学及工艺—金属表面处理]