DOI: 10.1016/j.scib.2020.02.019
论文题名: Cooperation of oxygen vacancies and 2D ultrathin structure promoting CO2 photoreduction performance of Bi4Ti3O12
作者: Liu L. ; Huang H. ; Chen F. ; Yu H. ; Tian N. ; Zhang Y. ; Zhang T.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期: 11 起始页码: 934
结束页码: 943
语种: 英语
中文关键词: Bismuth titanate
; Charge separation
; CO2 photoreduction
; Oxygen vacancies
; Ultrathin nanosheets
英文关键词: Artificial photosynthesis
; Carbon dioxide
; Electronic structure
; Nanosheets
; Oxygen vacancies
; Photocatalytic activity
; Titanium compounds
; Bismuth titanate
; Charge separations
; Migration distance
; Photo-reduction
; Photoabsorptions
; Reduction process
; Ultra-thin structures
; Ultrathin nanosheets
; Bismuth compounds
英文摘要: Reduction of CO2 to solar fuels by artificial photosynthesis technology has attracted considerable attention. However, insufficient separation of charge carriers and weak CO2 adsorption hamper the photocatalytic CO2 reduction activity. Herein, we tackle these challenges by introducing oxygen vacancies (OVs) on the two-dimensional Bi4Ti3O12 ultrathin nanosheets via a combined hydrothermal and post-reduction process. Selective photodeposition experiment of Pt over Bi4Ti3O12 discloses that the ultrathin structure shortens the migration distance of photo-induced electrons from bulk to the surface, benefiting the fast participation in the CO2 reduction reaction. The introduction of OVs on ultrathin Bi4Ti3O12 nanosheets leads to enormous amelioration on surface state and electronic structure, thereby resulting in enhanced CO2 adsorption, photoabsorption and charge separation efficiency. The photocatalytic experiments uncover that ultrathin Bi4Ti3O12 nanosheets with OVs reveal a largely enhanced CO2 photoreduction activity for producing CO with a rate of 11.7 μmol g−1 h−1 in the gas–solid system, ~3.2 times higher than that of bulk Bi4Ti3O12. This work not only yields efficient ultrathin photocatalysts with OVs, but also furthers our understanding on enhancing CO2 reduction via cooperative tactics. © 2020 Science China Press Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169986
Appears in Collections: 气候变化与战略
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作者单位: Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China; Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
Recommended Citation:
Liu L.,Huang H.,Chen F.,et al. Cooperation of oxygen vacancies and 2D ultrathin structure promoting CO2 photoreduction performance of Bi4Ti3O12[J]. Science Bulletin,2020-01-01,65(11)