Construction of the Sn-doped defect pyrochlore oxide KNbMoO6·H2O/g-C3N4 composite and its photocatalytic reduction of CO2. (3rd September 2022)

• Record Type: Journal Article
• Authors: Zeng, Xu; Wang, Bo; Zhang, Xin; Zhang, Hong; Fan, Meiqing; Wang, Jun; Ren, Bo; Yang, Xiaodong; Bai, Xuefeng
• Is Part Of: New journal of chemistry. Volume 46:Number 37(2022)
• Page Start: 17785
• Page End: 17790
• Publication Date: 2022-09-03
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj03415h
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : The Sn-doped defect pyrochlore oxide KNbMoO6 ·H2 O/g-C3 N4 composite can be used as a photocatalyst for conversion of CO2 in order to deal with energy and environmental issues. Abstract : In order to cope with the gradually increasing greenhouse effect and energy issues, it is remarkably desired to generate new semiconductors for photocatalysis for the conversion of CO2 into valuable fuels. Defect pyrochlore oxides are considered potential photocatalysts. Herein, the defective pyrochlore oxide KNbMoO6 ·H2 O (KNMO) was synthesized via a hydrothermal/solvothermal route for the first time, and then a g-C3 N4 coupled Sn-doped KNbMoO6 ·H2 O (SKNMO) (SKNMO/g-C3 N4 ) composite was successfully prepared. In comparison with the original KNMO, SKNMO/g-C3 N4 presents a higher photocatalytic performance, and the photocatalytic conversion efficiency of CO2 to CO has quadrupled. On the basis of UV-vis and photoluminescence results, we deduced that the improvement of photocatalytic activity is mainly due to the extended visible light response and intensive charge separation. This work implies that modified defect pyrochlore oxides have the potential to become a new type of photocatalyst, which can be applied in the fields of environmental remediation and energy regeneration.