Selective CO_(2) photoreduction to CH_(4) mediated by dimension-matched 2D/2D Bi_(3)NbO_(7)/g-C_(3)N_(4) S-scheme heterojunction

作     者：Kai Wang Xuezhen Feng Yangzi Shangguan Xiaoyong Wu Hong Chen 王楷;冯雪真;上官杨子;吴晓勇;陈洪

作者机构：Hubei Key Laboratory of Pollutant Analysis and Reuse TechnologyCollege of Urban and Environmental SciencesHubei Normal UniversityHuangshi 435002HubeiChina School of Resources and Environmental EngineeringWuhan University of TechnologyWuhan 430070HubeiChina School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055GuangdongChina 

基　　金：国家自然科学基金(21975193,21777045) 湖北省教育厅研究计划项目(Q20202501) 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2022年第43卷第2期

页      码：246-254页

摘      要：Discovering highly selective catalysts is key to achieve effective CO_(2) photoreduction to hydrocarbon *** this work,we construct an ultrathin dimension-matched S-scheme Bi_(3)NbO_(7)/g-C_(3)N_(4) heterostructure,which permits the highly selective photocatalytic reduction of CO_(2) to CH_(4),as shown by 13C isotopic *** functional theory calculations combined with solid-state characterization confirm the electron transfer from g-C_(3)N_(4) nanosheets to Bi_(3)NbO_(7),establishing an internal electric *** internal electric field drives photogenerated electrons from Bi_(3)NbO_(7) to g-C_(3)N_(4),as revealed by in-situ X-ray photoelectron spectroscopy,demonstrating the presence of an S-scheme charge transfer path in Bi_(3)NbO_(7)/g-C_(3)N_(4) heterostructures allowing efficient and selective CO2 *** a result,the optimized sample achieved a CH_(4) evolution rate of 37.59μmol·g^(-1)·h^(-1),a ca.15-fold enhancement compared to ultrathin g-C_(3)N_(4) nanosheets,and also retained stability after 10 reaction cycles and 40 h of simulated solar irradiation with no sacrificial *** optimized Bi3 Nb O7/g-C_(3)N_(4) composites achieve almost 90%selectivity for CH_(4) production over CO.

主 题 词：Dimension-matched S-scheme Photocatalysis CO_(2)reduction Selectivity 

学科分类：083002[083002] 0830[工学-生物工程类] 081702[081702] 081705[081705] 08[工学] 0817[工学-轻工类] 080502[080502] 0805[工学-能源动力学] 

核心收录：

D　O　I：10.1016/S1872-2067(21)63819-6

馆 藏 号：203107118...