Construction of S-scheme 0D/2D heterostructures for enhanced visible-light-driven CO2 reduction

被引：110
作者：
Gong, Shuaiqi [1 ]
Teng, Xue [1 ]
Niu, Yanli [1 ]
Liu, Xuan [1 ]
Xu, Mingze [1 ]
Xu, Chen [1 ]
Ji, Lvlv [2 ]
Chen, Zuofeng [1 ]
机构：
[1] Tongji Univ, Shanghai Key Lab Chem Assessment & Sustainabil, Sch Chem Sci & Engn, 1239 Siping Rd, Shanghai 200092, Peoples R China
[2] Zhejiang Sci Tech Univ, Key Lab Adv Text Mat & Mfg Technol, Hangzhou 310018, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2021年 / 298卷 / 298期
基金：
中国国家自然科学基金;
关键词：
S-scheme; 0D/2D heterojunction; InVO4 quantum dots; CO2; reduction; Photocatalysis; QUANTUM DOTS; PHOTOCATALYTIC REDUCTION; ATOMICALLY-THIN; CARBON NITRIDE; EFFICIENT; CONVERSION; HETEROJUNCTION; FABRICATION; SHEETS; CHARGE;
D O I：
10.1016/j.apcatb.2021.120521
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Zero-dimensional quantum dots (QDs) and two-dimensional nanosheets represent two kinds of distinctive materials with unique properties. Here, we describe the fabrication of step-scheme (i.e. S-scheme) 0D/2D hetero-structure with InVO4 QDs and g-C3N4 (CN) ultrathin nanosheets for photocatalytic CO2 reduction. The formation of S-scheme heterostructure facilitates the separation of electron-hole pairs and reduces the recombination of charge carriers. Moreover, the light-absorption edge of InVO4/CN is extended to 605 nm because of the strong visible light absorption of InVO4 QDs. The 0D/2D hybrid enables highly selective photocatalytic reduction of CO2 to CO (93.3 %) at a decent rate of 69.8 mu mol g(-1) h(-1) under visible light irradiation. Density functional theory (DFT) results suggest that the formation of InVO4/CN heterostructure can enhance CO2 adsorption/activation, stabilize COOH* intermediates and allow rapid CO desorption as the major product. This study opens up a new possibility for construction of novel S-scheme heterostructure for photocatalytic applications.
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页数：11
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