Graphitic carbon nitride/La,Rh co-doped SrTiO_(3)S-scheme heterojunction for photocatalytic CO_(2)reduction  

作　　者：Si-Jie Wan Yan-Ting Hou Wang Wang Guo-Qiang Luo Chuan-Bin Wang Rong Tu Shao-Wen Cao 

机构地区：[1]Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory,Chaozhou 521000,China [2]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China [3]Hubei Technology Innovation Center for Advanced Composites,Wuhan University of Technology,Wuhan 430070,China

出　　处：《Rare Metals》2024年第11期5880-5890,共11页稀有金属（英文版）

基　　金：financially supported by the Key-Area Research and Development Program of Guangdong Province(No.2021B0707050001);the Self-innovation Research Funding Project of Hanjiang Laboratory(No.HJL202202A001)。

摘　　要：Photocatalytic reduction of CO_(2)has attracted considerable interest owing to its potential to resolve the energy and environmental problems.Nevertheless,the lack of proficient photocatalysts has restricted the application of solar-driven photocatalytic CO_(2)reduction.Herein,we reported an S-scheme heterojunction by combining g-C_(3)N_(4)with La^(3+)and Rh^(3+)co-doped SrTiO_(3)through the electrostatic self-assembly method for the efficient photocatalytic CO_(2)reduction.In comparison with g-C_(3)N_(4),the asprepared CN/LRSTO-30 wt%S-scheme heterojunction not only possesses a broadened visible-light response due to the defect states in La,Rh co-doped SrTiO_(3)induced by codoped La^(3+)and Rh^(3+)but also has more adsorption sites for the capture and activation of CO_(2)molecules.Additionally,separation and transfer efficiency of the photoinduced charge carriers is much enhanced in the CN/LRSTO-30wt%S-scheme heterojunction via its robust internal electric field,which is firmly demonstrated by in situ irradiation X-ray photoelectron spectroscopy technology.Consequently,the prepared S-scheme heterojunction achieves impressive photocatalytic CO_(2)reduction performance with an average CO and CH4 evolution rate of4.1-1.8μmol·g^(-1)·h^(-1),respectively,which are~1.9 and~22.5-fold higher than those of pure g-C_(3)N_(4).This study provides innovative perspectives on the design of creative S-scheme heterojunctions for applications in photocatalytic CO_(2)reduction.

关 键 词：g-C_(3)N_(4) La Rh co-doped SrTiO_(3) S-scheme heterojunction Separation of photogenerated charge carriers Photocatalytic CO_(2)reduction 

分 类 号：X701[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]