Construction of a double heterojunction between graphite carbon nitride and anatase TiO2 with co-exposed (101) and (001) faces for enhanced photocatalytic degradation. Issue 31 (13th July 2022)

• Record Type: Journal Article
• Authors: Sun, Jingjing; Deng, Lang; Sun, Jing; Shen, Tingting; Wang, Xikui; Zhao, Rusong; Zhang, Yiyao; Wang, Baolin
• Is Part Of: RSC advances. Volume 12:Issue 31(2022)
• Page Start: 20206
• Page End: 20216
• Publication Date: 2022-07-13
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d2ra01620f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A double-heterojunction-structure photocatalyst g-C3 N4 /(101)-(001)-TiO2 with Z-system and surface heterojunction, was synthesized, which can effectively promote the separation of photogenerated e − –h + pairs and the degradation of organic pollutants. Abstract : This study aimed to promote the separation of photogenerated carriers and improve the redox performance of graphite carbon nitride (g-C3 N4 ) by synthesizing a double-heterojunction-structure photocatalyst, g-C3 N4 /(101)-(001)-TiO2, through the solvothermal method. The photocatalyst comprised a Z-system formed from g-C3 N4 and the (101) plane of TiO2, as well as a surface heterojunction formed from the (101) and (001) planes of TiO2 . The results showed that g-C3 N4 /(101)-(001)-TiO2 had strong photocatalytic activity and stable performance in the photodegradation of paracetamol. The active species ·O2 − and ·OH were found to play important roles in the photocatalytic degradation of paracetamol through a radical-quenching experiment. The charge-transfer mechanism was also described in detail. Overall, this work provided a new strategy for the Z-system heterojunction and opened up the application of this structure in the degradation of organic pollutants.