Creation of Sn_(x)Nb_(1−x)O_(2) solid solution through heavy Nb-doping in SnO_(2) to boost its photocatalytic CO_(2) reduction to C_(2+) products under simulated solar illumination
作者机构：Key Laboratory of Advanced Technologies of Materials(Ministry of Education)School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China
出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)
年 卷 期：2022年第11卷第9期
页 面：1404-1416页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：This study was supported by the National Natural Science Foundation of China(Grant No.51902271) the Fundamental Research Funds for the Central Universities(Grant Nos.2682020CX07,2682020CX08,and 2682021CX116) Sichuan Science and Technology Program(Grant Nos.2020YJ0072,2020YJ0259,and 2021YFH0163)
主 题：photocatalytic CO_(2)reduction heavy Nb-doping tin oxide solid solution C^(2+)product
摘 要：Photocatalytic CO_(2)reduction driven by green solar energy could be a promising approach for the carbon neutral *** this work,a novel defect engineering approach was developed to form the Sn_(x)Nb_(1-x)O_(2)solid solution by the heavy substitutional Nb-doping of SnO_(2)through a robust hydrothermal *** detailed analysis demonstrated that the heavy substitution of Sn^(4+)by a higher valence Nb^(5+)created a more suitable band structure,a better photogenerated charge carrier separation and transfer,and stronger CO_(2)adsorption due to the presence of abundant acid centers and excess electrons on its ***,the Sn_(x)Nb_(1-x)O_(2)solid solution sample demonstrated a much better photocatalytic CO_(2)reduction performance compared to the pristine SnO_(2)sample without the need for sacrificial *** photocatalytic CO_(2)reduction efficiency reached~292.47μmol/(g·h),which was 19 times that of the pristine SnO_(2)***,its main photocatalytic CO_(2)reduction product was a more preferred multi-carbon(C_(2+))compound of C_(2)H_(5)OH,while that of the pristine SnO_(2)sample was a one-carbon(C1)compound of CH_(3)*** work demonstrated that,the heavy doping of high valence cations in metal oxides to form solid solution may enhance the photocatalytic CO_(2)reduction and modulate its reduction process,to produce more C_(2+)*** material design strategy could be readily applied to various material systems for the exploration of high-performance photocatalysts for the solar-driven CO_(2)reduction.
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