Zheng Li , Xiaoying Zhang , Zuquan Jin , Haosen Jiang , Xiaoqing Wang , Yuehua Chen , Yue Zhang , Baorong Hou
{"title":"硫化锌铟/氧化钛 Z 型异质结增强光阴极保护涂层的防腐机理","authors":"Zheng Li , Xiaoying Zhang , Zuquan Jin , Haosen Jiang , Xiaoqing Wang , Yuehua Chen , Yue Zhang , Baorong Hou","doi":"10.1016/j.conbuildmat.2024.139109","DOIUrl":null,"url":null,"abstract":"<div><div>In order to develop novel anti-corrosion technologies of metals, the photoelectrochemical cathodic protection (PECCP) coating with zinc indium sulfide/titanium oxide (Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub>/TiO<sub>2</sub>) was successfully fabricated and its enhanced anticorrosion mechanism was explored in marine environment under light and dark condition, respectively. It found that the improvement of anticorrosion performance is due to the introduction of Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub>/TiO<sub>2</sub> with Z-scheme heterojunctions, which has been verified systematically through theoretical calculations and electrochemical experiments. Under illumination, the photoelectrons generated by Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub>/TiO<sub>2</sub> Z-scheme heterojunctions were accumulated on the conduction band (CB) of Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub> at an internal electric field (IEF) pointing from Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub> to TiO<sub>2</sub>, which endowed Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub>/TiO<sub>2</sub> with strong oxidation-reduction ability to provide PECCP for Q235CS and 304SS in 3.5 wt% NaCl. In the dark state, Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub>/TiO<sub>2</sub> Z-scheme heterojunctions served as nanofills to enhance the maze effect, ensuring the remarkable anticorrosion performance of PECCP coating. Furthermore, the protective effect of Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub>/TiO<sub>2</sub> coating was quantified as 74.23 % and 98.91 % for 304SS and Q235CS in 3.5 wt% NaCl for 30 days, respectively.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"453 ","pages":"Article 139109"},"PeriodicalIF":7.4000,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced anticorrosion mechanism of photocathodic protection coatings with zinc indium sulfide/titanium oxide Z-scheme heterojunctions\",\"authors\":\"Zheng Li , Xiaoying Zhang , Zuquan Jin , Haosen Jiang , Xiaoqing Wang , Yuehua Chen , Yue Zhang , Baorong Hou\",\"doi\":\"10.1016/j.conbuildmat.2024.139109\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>In order to develop novel anti-corrosion technologies of metals, the photoelectrochemical cathodic protection (PECCP) coating with zinc indium sulfide/titanium oxide (Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub>/TiO<sub>2</sub>) was successfully fabricated and its enhanced anticorrosion mechanism was explored in marine environment under light and dark condition, respectively. It found that the improvement of anticorrosion performance is due to the introduction of Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub>/TiO<sub>2</sub> with Z-scheme heterojunctions, which has been verified systematically through theoretical calculations and electrochemical experiments. Under illumination, the photoelectrons generated by Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub>/TiO<sub>2</sub> Z-scheme heterojunctions were accumulated on the conduction band (CB) of Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub> at an internal electric field (IEF) pointing from Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub> to TiO<sub>2</sub>, which endowed Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub>/TiO<sub>2</sub> with strong oxidation-reduction ability to provide PECCP for Q235CS and 304SS in 3.5 wt% NaCl. In the dark state, Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub>/TiO<sub>2</sub> Z-scheme heterojunctions served as nanofills to enhance the maze effect, ensuring the remarkable anticorrosion performance of PECCP coating. Furthermore, the protective effect of Zn<sub>2</sub>In<sub>2</sub>S<sub>5</sub>/TiO<sub>2</sub> coating was quantified as 74.23 % and 98.91 % for 304SS and Q235CS in 3.5 wt% NaCl for 30 days, respectively.</div></div>\",\"PeriodicalId\":288,\"journal\":{\"name\":\"Construction and Building Materials\",\"volume\":\"453 \",\"pages\":\"Article 139109\"},\"PeriodicalIF\":7.4000,\"publicationDate\":\"2024-11-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Construction and Building Materials\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S095006182404251X\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Construction and Building Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S095006182404251X","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Enhanced anticorrosion mechanism of photocathodic protection coatings with zinc indium sulfide/titanium oxide Z-scheme heterojunctions
In order to develop novel anti-corrosion technologies of metals, the photoelectrochemical cathodic protection (PECCP) coating with zinc indium sulfide/titanium oxide (Zn2In2S5/TiO2) was successfully fabricated and its enhanced anticorrosion mechanism was explored in marine environment under light and dark condition, respectively. It found that the improvement of anticorrosion performance is due to the introduction of Zn2In2S5/TiO2 with Z-scheme heterojunctions, which has been verified systematically through theoretical calculations and electrochemical experiments. Under illumination, the photoelectrons generated by Zn2In2S5/TiO2 Z-scheme heterojunctions were accumulated on the conduction band (CB) of Zn2In2S5 at an internal electric field (IEF) pointing from Zn2In2S5 to TiO2, which endowed Zn2In2S5/TiO2 with strong oxidation-reduction ability to provide PECCP for Q235CS and 304SS in 3.5 wt% NaCl. In the dark state, Zn2In2S5/TiO2 Z-scheme heterojunctions served as nanofills to enhance the maze effect, ensuring the remarkable anticorrosion performance of PECCP coating. Furthermore, the protective effect of Zn2In2S5/TiO2 coating was quantified as 74.23 % and 98.91 % for 304SS and Q235CS in 3.5 wt% NaCl for 30 days, respectively.
期刊介绍：
Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged.
Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.
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