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Photoinduced Defect Engineering: Enhanced Photothermal Catalytic Performance of 2D Black In 2 O 3− x Nanosheets with Bifunctional Oxygen Vacancies
Author(s) -
Qi Yuhang,
Song Lizhu,
Ouyang Shuxin,
Liang Xichen,
Ning Shangbo,
Zhang QiQi,
Ye Jinhua
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201903915
Subject(s) - bifunctional , materials science , photothermal therapy , catalysis , oxygen , molecule , nanotechnology , photochemistry , selectivity , adsorption , oxygen evolution , chemical engineering , chemical physics , chemistry , electrochemistry , organic chemistry , engineering , electrode
Photothermal CO 2 reduction technology has attracted tremendous interest as a solution for the greenhouse effect and energy crisis, and thereby it plays a critical role in solving environmental problems and generating economic benefits. In 2 O 3− x has emerged as a potential photothermal catalyst for CO 2 conversion into CO via the light‐driven reverse water gas shift reaction. However, it is still a challenge to modulate the structural and electronic characteristics of In 2 O 3 to enhance photothermocatalytic activity synergistically. In this work, a novel route to activate inert In(OH) 3 into 2D black In 2 O 3− x nanosheets via photoinduced defect engineering is proposed. Theoretical calculations and experimental results verify the existence of bifunctional oxygen vacancies in the 2D black In 2 O 3− x nanosheets host, which enhances light harvesting and chemical adsorption of CO 2 molecules dramatically, achieving 103.21 mmol g cat −1 h −1 with near‐unity selectivity for CO generation and meanwhile excellent stability. This study reveals an exciting phenomenon that light is an ideal external stimulus on the layered In 2 O 3 system, and its electronic structure can be adjusted efficiently through photoinduced defect engineering; it can be anticipated that this synthesis strategy can be extended to wider application fields.