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Nano Research 2020, 13(4): 983-988 https://doi.org/10.1007/s12274-020-2728-6
Research Article | Issue | Published: 14 March 2020

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

Show Author's Information Lifei Liu1,2,  Jianling Zhang1,2,3( ),  Xiuniang Tan1,2,  Bingxing Zhang1,2,  Jinbiao Shi1,2,  Xiuyan Cheng1,2,  Dongxing Tan1,2,  Buxing Han1,2,3,  Lirong Zheng4,  Fanyu Zhang1,2
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
School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Physical Science Laboratory, Huairou National Comprehensive Science Center, Beijing 101400, China
Beijing Synchrotron Radiation Facility (BSRF), Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Keywords:
TiO2, visible light, supercritical CO2, covalent organic framework (COF), H2 production
Topics:
Carbon dioxideEnergy utilizationHeterojunctionsHydrogen productionPhotocatalytic activity Solar energyTitanium Dioxide
Cite this article:
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 Research, 2020, 13(4): 983-988. https://doi.org/10.1007/s12274-020-2728-6
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Abstract Full text Electronic supplementary material About this article

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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About this article

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

Show Author's information Lifei Liu1,2, Jianling Zhang1,2,3( ), Xiuniang Tan1,2, Bingxing Zhang1,2, Jinbiao Shi1,2, Xiuyan Cheng1,2, Dongxing Tan1,2, Buxing Han1,2,3, Lirong Zheng4, Fanyu Zhang1,2
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
School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Physical Science Laboratory, Huairou National Comprehensive Science Center, Beijing 101400, China
Beijing Synchrotron Radiation Facility (BSRF), Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

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.

Keywords: TiO2, visible light, supercritical CO2, covalent organic framework (COF), H2 production

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Publication history
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Acknowledgements

Publication history

Received: 18 December 2019
Revised: 09 February 2020
Accepted: 21 February 2020
Published: 14 March 2020
Issue date: April 2020

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020

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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