{"title":"Preparation of Ti4O7/h-BN self-supported ceramic photoelectrode and its photoelectrocatalytic performance for water purification","authors":"Shanshan Li, Yanan Gong, Md Azharul Hossain, Zeqi Jiang, Jiarong Zhang, Guowen Wang, Yinghuan Fu, Pengyuan Wang, Yu Song, Hongchao Ma","doi":"10.1002/apj.3072","DOIUrl":null,"url":null,"abstract":"<p>The construction of high-efficiency self-supported ceramic photoelectrode based on ideal semiconductor materials is essential for achieving effective degradation of pollutants by photoelectrocatalysis (PEC) technology. Herein, a Ti<sub>4</sub>O<sub>7</sub>/h-BN composite ceramic photoelectrode with a unique microstructure was fabricated by a step-by-step calcination process and used in PEC water pollution remediation. The PEC activity of Ti<sub>4</sub>O<sub>7</sub> ceramic photoelectrode could be enhanced by introducing hexagonal boron nitride (h-BN) nanoparticles on the surface. The most optimized Ti<sub>4</sub>O<sub>7</sub>/h-BN photoelectrode exhibited the decolorization rate of active brilliant blue KN-R at about 97.79% in 30 min. The PEC activities could remain stable during five degradation cycles. The excellent photoelectrocatalytic performance of Ti<sub>4</sub>O<sub>7</sub>/h-BN ceramic photoelectrode could be attributed to the low Tafel slope, low charge transfer resistance, large electrochemical active area, and excellent photo-generated carrier separation efficiency. A type-II heterojunction was formed between the Ti<sub>4</sub>O<sub>7</sub> and h-BN, which caused more effective carrier separation and enhanced the generation of dominant active species •O<sup>2−</sup> and h<sup>+</sup>. This work provided a mature synthesis strategy of Ti<sub>4</sub>O<sub>7</sub>/h-BN self-supported ceramic photoelectrodes with excellent practical application prospects to achieve superior PEC performance for water purification.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Asia-Pacific Journal of Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/apj.3072","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The construction of high-efficiency self-supported ceramic photoelectrode based on ideal semiconductor materials is essential for achieving effective degradation of pollutants by photoelectrocatalysis (PEC) technology. Herein, a Ti4O7/h-BN composite ceramic photoelectrode with a unique microstructure was fabricated by a step-by-step calcination process and used in PEC water pollution remediation. The PEC activity of Ti4O7 ceramic photoelectrode could be enhanced by introducing hexagonal boron nitride (h-BN) nanoparticles on the surface. The most optimized Ti4O7/h-BN photoelectrode exhibited the decolorization rate of active brilliant blue KN-R at about 97.79% in 30 min. The PEC activities could remain stable during five degradation cycles. The excellent photoelectrocatalytic performance of Ti4O7/h-BN ceramic photoelectrode could be attributed to the low Tafel slope, low charge transfer resistance, large electrochemical active area, and excellent photo-generated carrier separation efficiency. A type-II heterojunction was formed between the Ti4O7 and h-BN, which caused more effective carrier separation and enhanced the generation of dominant active species •O2− and h+. This work provided a mature synthesis strategy of Ti4O7/h-BN self-supported ceramic photoelectrodes with excellent practical application prospects to achieve superior PEC performance for water purification.
期刊介绍:
Asia-Pacific Journal of Chemical Engineering is aimed at capturing current developments and initiatives in chemical engineering related and specialised areas. Publishing six issues each year, the journal showcases innovative technological developments, providing an opportunity for technology transfer and collaboration.
Asia-Pacific Journal of Chemical Engineering will focus particular attention on the key areas of: Process Application (separation, polymer, catalysis, nanotechnology, electrochemistry, nuclear technology); Energy and Environmental Technology (materials for energy storage and conversion, coal gasification, gas liquefaction, air pollution control, water treatment, waste utilization and management, nuclear waste remediation); and Biochemical Engineering (including targeted drug delivery applications).