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Defect‐Rich Bi 12 O 17 Cl 2 Nanotubes Self‐Accelerating Charge Separation for Boosting Photocatalytic CO 2 Reduction

2018; Wiley; Volume: 130; Issue: 45 Linguagem: Inglês

10.1002/ange.201809492

1521-3757

Jun Di, Chao Zhu, Mengxia Ji, Meilin Duan, Ran Long, Cheng Yan, Kaizhi Gu, Jun Xiong, Yuanbin She, Jiexiang Xia, Huaming Li, Zheng Liu,

Catalytic Processes in Materials Science

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.