| DOI | 10.1016/j.scib.2020.02.019
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| Cooperation of oxygen vacancies and 2D ultrathin structure promoting CO2 photoreduction performance of Bi4Ti3O12 |
| Liu L.; Huang H.; Chen F.; Yu H.; Tian N.; Zhang Y.; Zhang T.
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| 发表日期 | 2020
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| ISSN | 20959273
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| 起始页码 | 934
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| 结束页码 | 943
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| 卷号 | 65期号:11 |
| 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 |
| 关键词 | Bismuth titanateCharge separationCO2 photoreductionOxygen vacanciesUltrathin 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 |
| 语种 | 英语
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| 来源期刊 | Science Bulletin
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| 文献类型 | 期刊论文
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| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/207130
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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
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推荐引用方式
GB/T 7714 |
Liu L.,Huang H.,Chen F.,et al. Cooperation of oxygen vacancies and 2D ultrathin structure promoting CO2 photoreduction performance of Bi4Ti3O12[J],2020,65(11).
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| APA |
Liu L..,Huang H..,Chen F..,Yu H..,Tian N..,...&Zhang T..(2020).Cooperation of oxygen vacancies and 2D ultrathin structure promoting CO2 photoreduction performance of Bi4Ti3O12.Science Bulletin,65(11).
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| MLA |
Liu L.,et al."Cooperation of oxygen vacancies and 2D ultrathin structure promoting CO2 photoreduction performance of Bi4Ti3O12".Science Bulletin 65.11(2020).
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