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Supercritical CO2 produces the visible-light-responsive TiO2/COF heterojunction with enhanced electron-hole separation for high-performance hydrogen evolution

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Abstract

To construct the heterojunctions of TiO2 with other compounds is of great importance for overcoming its inherent shortages and improving the visible-light photocatalytic performance. Here we propose the construction of TiO2/covalent organic framework (COF) heterojunction with tight connection by a supercritical CO2 (SC CO2) method, which helps bridging the transformation paths for photo-induced charge between TiO2 and COF. The produced TiO2/COF heterojunction performs a H2 evolution of 3,962 µmol·g−1·h−1 under visible-light irradiation, which is ∼ 25 times higher than that of pure TiO2 and 4.5 folds higher than that of TiO2/COF synthesized by the conventional solvothermal method. This study opens up new possibilities for constructing heterojunctions for solar energy utilization.

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Acknowledgements

The authors thank the financial supports from Ministry of Science and Technology of China (No. 2017YFA0403003), the National Natural Science Foundation of China (Nos. 21525316 and 21673254), Chinese Academy of Sciences (No. QYZDY-SSW-SLH013), and Beijing Municipal Science & Technology Commission (No. Z191100007219009).

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Authors and Affiliations

  1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China

    Lifei Liu, Jianling Zhang, Xiuniang Tan, Bingxing Zhang, Jinbiao Shi, Xiuyan Cheng, Dongxing Tan, Buxing Han & Fanyu Zhang

  2. School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China

    Lifei Liu, Jianling Zhang, Xiuniang Tan, Bingxing Zhang, Jinbiao Shi, Xiuyan Cheng, Dongxing Tan, Buxing Han & Fanyu Zhang

  3. Physical Science Laboratory, Huairou National Comprehensive Science Center, Beijing, 101400, China

    Jianling Zhang & Buxing Han

  4. Beijing Synchrotron Radiation Facility (BSRF), Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China

    Lirong Zheng

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  1. Lifei Liu
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  2. Jianling Zhang
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  3. Xiuniang Tan
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Correspondence to Jianling Zhang.

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Supercritical CO2 produces the visible-light-responsive TiO2/COF heterojunction with enhanced electron-hole separation for highperformance hydrogen evolution

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Liu, L., Zhang, J., Tan, X. et al. Supercritical CO2 produces the visible-light-responsive TiO2/COF heterojunction with enhanced electron-hole separation for high-performance hydrogen evolution. Nano Res. 13, 983–988 (2020). https://doi.org/10.1007/s12274-020-2728-6

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