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Fabrication of ZnAl-LDH/TiO2 heterojunction material and it's application in photoelectrochemical cathodic protection

文献类型：期刊论文

作者Dai, Yongchao2,3; Liu, Xiangju3; Liu, Nazhen3; Wang, Yuanxia2,3; Kuai, Bowen1,3; Jiang, Quantong3; Wang, Xiutong3; Hou, Baorong3
刊名APPLIED SURFACE SCIENCE
出版日期2026-06-01
卷号730页码:14
关键词ZnAl-LDH Z -scheme heterojunction 304 stainless steel Photoelectrochemical cathodic protection
ISSN号0169-4332
DOI10.1016/j.apsusc.2026.166264
通讯作者Liu, Nazhen(liunazhen@qdio.ac.cn)
英文摘要TiO2-based n-type semiconductor materials are promising photoanodic materials in photoelectrochemical (PEC) cathodic protection, if only their dependence to hole scavengers can be overcome. In this study, ZnAl-layered double hydroxide/TiO2 composites (Ti-Z/A) were prepared hydrothermally. The PEC cathodic protection performance of the composites was then tested in NaCl solution, without the use of any hole scavengers. Open circuit potential (OCP)-time (OCP-t) and current-time (i-t) measurements indicated that the composite with a Zn: Al ratio of 3:1 exhibited the most effective cathodic protection of 304 stainless steel (304 SS), as evidenced by the largest negative shift in OCP (-350 mV) and the highest photocurrent density (10 mu A cm-2). An 85-h intermittent illumination test demonstrated the long-term stability of the Ti-Z/A photoanode. Reasons for the non-dependence of Ti-Z/A on hole scavengers were discussed in detail. The result indicated a Z-scheme heterojunction between ZnAl-LDH and TiO2 was formed, which preserved powerful redox potentials (e.g., highly oxidizing holes and highly reducing electrons). The highly oxidizing holes can be directly consumed by ambient substances (e.g., H2O, OH-). The result demonstrated a direct, rapid and thorough consumption of photo-generated holes is essential to maintain long-term performance of TiO2 based photoanodes.
WOS关键词TIO2
资助项目National Key R & D Program of China[2024YFB4207000] ; National Natural Science Foundation of China[52201092] ; Shandong Provincial Natural Science Foundation[ZR2022QB128] ; CAS Pioneer Hundred Talents Program
WOS研究方向Chemistry ; Materials Science ; Physics
语种英语
WOS记录号WOS:001693848400001
出版者ELSEVIER
源URL[http://ir.qdio.ac.cn/handle/337002/204796]  
专题海洋研究所_海洋腐蚀与防护研究发展中心
通讯作者Liu, Nazhen
作者单位1.Qilu Univ Technol, Shandong Acad Sci, Sch Mat Sci & Engn, Jinan 250353, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, State Key Lab Adv Marine Mat, Qingdao 266071, Peoples R China
推荐引用方式
GB/T 7714		 Dai, Yongchao,Liu, Xiangju,Liu, Nazhen,et al. Fabrication of ZnAl-LDH/TiO2 heterojunction material and it's application in photoelectrochemical cathodic protection[J]. APPLIED SURFACE SCIENCE,2026,730:14.
APA Dai, Yongchao.,Liu, Xiangju.,Liu, Nazhen.,Wang, Yuanxia.,Kuai, Bowen.,...&Hou, Baorong.(2026).Fabrication of ZnAl-LDH/TiO2 heterojunction material and it's application in photoelectrochemical cathodic protection.APPLIED SURFACE SCIENCE,730,14.
MLA Dai, Yongchao,et al."Fabrication of ZnAl-LDH/TiO2 heterojunction material and it's application in photoelectrochemical cathodic protection".APPLIED SURFACE SCIENCE 730(2026):14.

入库方式： OAI收割

来源：海洋研究所

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