文献类型：期刊文献

英文题名：Atomically-thin Bi2MoO6 nanosheets with vacancy pairs for improved photocatalytic CO2 reduction

作者：Di, Jun[2];Zhao, Xiaoxu[3];Lian, Cheng[4];Ji, Mengxia[1];Xia, Jiexiang[1];Xiong, Jun[1];Zhou, Wu[5];Cao, Xingzhong[6];She, Yuanbin[7];Liu, Honglai[4];Loh, Kian Ping[3];Pennycook, Stephen J.[3];Li, Huaming[1];Liu, Zheng[2]

机构：[1]Jiangsu Univ, Inst Energy Res, Sch Chem & Chem Engn, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China;[2]Nanyang Technol Univ, Sch Mat Sci & Engn, Ctr Programmable Mat, Singapore 639798, Singapore;[3]Natl Univ Singapore, Dept Mat Sci & Engn, 9 Engn Dr 1, Singapore 117575, Singapore;[4]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[5]Univ Chinese Acad Sci, Sch Phys Sci, CAS Key Lab Vacuum Sci, Beijing 100049, Peoples R China;[6]Chinese Acad Sci, Inst High Energy Phys, Multidiscipline Res Div, Beijing 100049, Peoples R China;[7]Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310032, Zhejiang, Peoples R China

年份：2019

卷号：61

起止页码：54

外文期刊名：NANO ENERGY

收录：;EI(收录号：20191606802875);WOS:【SCI-EXPANDED(收录号:WOS:000471201800007)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. 21676128, 21606113 and 21576123), Singapore National Research Foundation under NRF RF Award No. NRF-RF2013-08, MOE2016-T2-1-131, MOE2015-T2-2-007, Tier 1 2017-T1-001-075.

语种：英文

外文关键词：Bi2MoO6; Photocatalytic; CO2 reduction; Ultrathin; Vacancy pairs

摘要：Exploring efficient strategies to increase CO2 photoreduction performance is a key challenge in the energy conversion field. Herein, a cooperative role involving an ultrathin 2D structure and surface defects is employed to design defective Bi2MoO6 ultrathin nanosheets, to boost the CO2 photoreduction activity under water with no sacrificial agent, co-catalyst or extra photosensitizer. Bi2MoO6 ultrathin nanosheets with surface "Bi-O '' vacancy pairs are grown via a template-directed strategy, as proved by STEM-ADF and positron annihilation spectroscopy. The engineered "Bi-O '' vacancy pairs tune the local atomic structure, electronic structure of Bi2MoO6 and serve as charge separation centers to boost the electron-hole separation. Meanwhile, the defective ultrathin structure favors the CO2 adsorption, activation and CO desorption processes. With the merits of atomically-thin configuration and surface defects, the defective Bi2MoO6 ultrathin nanosheets display 2.55 times improved CO formation rate than their bulk counterpart under light irradiation.