S-scheme enhanced photocatalysis on titanium oxide clusters functionalized with soluble perylene diimides. Issue 38 (23rd September 2022)

• Record Type: Journal Article
• Authors: Dai, Shuqi; Xu, Yongsheng; Zhang, Weijie; Li, Shurong; Guo, Qing-Yun; Cui, Jinyi; Song, Yaohao; Yuan, Jun; Peng, Wenchao; Huang, Mingjun
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 38(2022)
• Page Start: 20248
• Page End: 20253
• Publication Date: 2022-09-23
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2ta06372g
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : We demonstrate that S-scheme photocatalysis of a hybrid system can promote the performance of photo-Fenton reaction under sunlight. Highly efficient charge-carrier separation can be achieved owing to a dispersion of TOC-PDI-POSS on the g-C3 N4 surface. Abstract : Fabricating S-scheme photocatalysts to optimize their ability of using sunlight has gained great attention in environmental remediation. Herein, we designed a soluble hybrid, titanium oxide cluster–perylene diimide–polyhedral oligomeric silsesquioxane (TOC–PDI–POSS). Through π–π stacking interaction with the most commonly applied graphitic carbon nitride (g-C3 N4 ), a new S-scheme heterostructure was successfully constructed. The combination of the near full visible light responsive TOC–PDI–POSS and g-C3 N4 enhanced the utilization of sunlight to achieve highly efficient charge-carrier separation. More importantly, the photo-Fenton reaction can be achieved without an extra oxidant. Owing to the enhanced oxidation capacity of holes, the obtained TOC–PDI–POSS/g-C3 N4 heterostructure displayed efficient photocatalytic degradation for phenol under an air atmosphere and the reaction rate constant reaches 5.6 h −1 in five cycles under simulated sunlight.