Construction of a CsPbBr3 modified porous g-C3N4 photocatalyst for effective reduction of CO2 and mechanism exploration. (4th January 2021)

• Record Type: Journal Article
• Authors: Wang, Yunqi; Liu, Zhixiang; Tang, Xu; Huo, Pengwei; Zhu, Zhi; Yang, Boting; Liu, Zhi
• Is Part Of: New journal of chemistry. Volume 45:Number 2(2021)
• Page Start: 1082
• Page End: 1091
• Publication Date: 2021-01-04
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d0nj04018e
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A P-CN/CsPbBr3 photocatalyst with a lamellar porous structure was prepared by a high temperature calcination and freeze drying method, and it exhibited superior CO2 reduction performance under the conditions of full spectrum irradiation. Abstract : In-depth research of the active sites and charge transport behavior is an important topic for investigating photocatalytic reduction of CO2 . Herein, a novel photocatalyst composed of flake-like porous graphitic carbon nitride (P-CN) and CsPbBr3 is fabricated via a high temperature calcination and freeze drying method. The experimental results show that P-CN/CsPbBr3 has a superior CO2 reduction efficiency, and that the yield of CO reaches 30.39 μmol g −1, which is about 7.2 and 1.2 times higher than those of the primary B-CN (4.2 μmol g −1 ) and CsPbBr3 (24.4 μmol g −1 ), respectively. The improvement in photocatalytic performance is mainly ascribed to the heterostructure, which can promote the separation of photogenerated carriers, and the porous structure of P-CN, which can improve the absorption capacity of CO2 . This study provides a significant method for the construction of efficient g-C3 N4 based photocatalysts to reduce CO2 .