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Integrated S‐Scheme Heterojunction of Amine‐Functionalized 1D CdSe Nanorods Anchoring on Ultrathin 2D SnNb 2 O 6 Nanosheets for Robust Solar‐Driven CO 2 Conversion
Author(s) -
Ke Xiaochun,
Zhang Jinfeng,
Dai Kai,
Fan Ke,
Liang Changhao
Publication year - 2021
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.202000805
Subject(s) - nanorod , heterojunction , photocatalysis , materials science , chemical engineering , nanotechnology , adsorption , visible spectrum , catalysis , optoelectronics , chemistry , organic chemistry , engineering
Photocatalytic CO 2 reduction to value‐added fuels is an appealing avenue in response to global warming and the energy crisis, but it still suffers from high energy barriers, low conversion efficiencies, and poor photostability. Herein, a novel S‐scheme SnNb 2 O 6 /CdSe–diethylenetriamine (SNO/CdSe–DET) heterojunction is designed by a microwave‐assisted solvothermal process, composed of 2D ultrathin SNO nanosheets (NSs) and amine‐modified CdSe–DET nanorods (NRs). The SNO/CdSe–DET composite without any co‐catalyst possesses a boosted performance in the solar‐driven photocatalytic conversion of CO 2 to CO, and the highest CO evolution rate achieved is 36.16 μmol g −1 h −1 , which is roughly 3.58 and 9.39 times greater than those of CdSe–DET and SNO under visible‐light illumination. Such a superior activity should be ascribed to the S‐scheme system, which benefits the separation of the photogenerated carriers and promotes the synergy between CdSe–DET NRs and SNO NSs by strong chemical‐bonding coordination. Meanwhile, DET can enhance CO 2 adsorption/activation and precisely regulate the surface reactive sites. This innovative work provides fresh insight into the development of highly efficient S‐scheme photocatalytic heterostructures for CO 2 reduction.