Carbon Quantum Dot Implanted Graphite Carbon Nitride Nanotubes: Excellent Charge Separation and Enhanced Photocatalytic Hydrogen Evolution |
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| Authors: | Yang Wang Prof Xueqin Liu Dr Jia Liu Prof Bo Han Xiaoqin Hu Fan Yang Zuwei Xu Yinchang Li Songru Jia Prof Zhen Li Prof Yanli Zhao |
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| Institution: | 1. Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, P. R. China;2. Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore;3. State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan, P. R. China |
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| Abstract: | Graphite carbon nitride (g‐C3N4) is a promising candidate for photocatalytic hydrogen production, but only shows moderate activity owing to sluggish photocarrier transfer and insufficient light absorption. Herein, carbon quantum dots (CQDs) implanted in the surface plane of g‐C3N4 nanotubes were synthesized by thermal polymerization of freeze‐dried urea and CQDs precursor. The CQD‐implanted g‐C3N4 nanotubes (CCTs) could simultaneously facilitate photoelectron transport and suppress charge recombination through their specially coupled heterogeneous interface. The electronic structure and morphology were optimized in the CCTs, contributing to greater visible light absorption and a weakened barrier of the photocarrier transfer. As a result, the CCTs exhibited efficient photocatalytic performance under light irradiation with a high H2 production rate of 3538.3 μmol g?1 h?1 and a notable quantum yield of 10.94 % at 420 nm. |
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| Keywords: | carbon quantum dots graphite carbon nitride hydrogen production photocatalysis nanotubes |
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