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Defect‐Rich Bi 12 O 17 Cl 2 Nanotubes Self‐Accelerating Charge Separation for Boosting Photocatalytic CO 2 Reduction
Author(s) -
Di Jun,
Zhu Chao,
Ji Mengxia,
Duan Meilin,
Long Ran,
Yan Cheng,
Gu Kaizhi,
Xiong Jun,
She Yuanbin,
Xia Jiexiang,
Li Huaming,
Liu Zheng
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201809492
Subject(s) - materials science , reagent , photocatalysis , charge carrier , selectivity , chemical engineering , nanotechnology , boosting (machine learning) , energy conversion efficiency , catalysis , optoelectronics , chemistry , biochemistry , machine learning , computer science , engineering
Abstract Solar‐driven reduction of CO 2 , which converts inexhaustible solar energy into value‐added fuels, has been recognized as a promising sustainable energy conversion technology. However, the overall conversion efficiency is significantly limited by the inefficient charge separation and sluggish interfacial reaction dynamics, which resulted from a lack of sufficient active sites. Herein, Bi 12 O 17 Cl 2 superfine nanotubes with a bilayer thickness of the tube wall are designed to achieve structural distortion for the creation of surface oxygen defects, thus accelerating the carrier migration and facilitating CO 2 activation. Without cocatalyst and sacrificing reagent, Bi 12 O 17 Cl 2 nanotubes deliver high selectivity CO evolution rate of 48.6 μmol g −1 h −1 in water (16.8 times than of bulk Bi 12 O 17 Cl 2 ), while maintaining stability even after 12 h of testing. This paves the way to design efficient photocatalysts with collaborative optimizing charge separation and CO 2 activation towards CO 2 photoreduction.