Facile construction of porous C-PDA@CN-ms core-shell heterostructures with superior photocatalytic H2 evolution |
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| Affiliation: | 1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;2. National Materials Corrosion and Protection Data Center, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China;3. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China;1. Ufa State Petroleum Technological University, Ufa, 450064, Russia;2. Department of Petroleum Engineering, Shahid Bahonar University of Kerman, Kerman, Iran;3. Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran;4. College of Engineering and Technology, American University of the Middle East, Kuwait;5. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing, China;6. Department of Chemical Engineering, McGill University, Montreal, QC H3A 0C5, Canada;1. Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang, 621907, PR China;2. Institute of Materials, China Academy of Engineering Physics, Mianyang, 621900, China |
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| Abstract: | Building carbon nitride (CN)-based core shell heterostructures is an effective strategy to enhance the photocatalytic performance and stability by optimize the interface area and protect the CN core, respectively. Moreover, by fabricating the porous structures in core shells can further optimize the light absorption, charge separation, and mass transfer. Herein, we have constructed porous C-PDA–CN–ms core-shell heterostructures through a facile green molten salt (ms) sculpture the polydopamine (PDA) derived carbon (C-PDA) shells with CN core. In which, the C-PDA-CN core-shells arise from in situ polymerization of dopamine (DA) on the surface of melamine to form PDA@melamine coatings followed by thermal polycondensation. The molten salts at high-temperature act as a green fluid immersing in and out of C-PDA-CN core-shells to further produce porous structures. The 1 wt% C-PDA–CN–ms with porous core-shell structures display photocatalytic H2 evolution rate of 3830 μmol h?1 g?1, which is 20.8 times enhancement of 1 wt% C-PDA-CN core-shells, even 73.6 times higher than that of pristine CN. It reveals that the porous and core-shell heterostructures endow C-PDA–CN–ms enhanced light absorption, various charge transport channels for improved charge carrier separation and transfer, contributing to the superior photocatalytic H2 evolution performance. Our work opens a new window for the green construction of porous core-shell heterostructures of CN-based photocatalysts. |
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| Keywords: | Core-shell Carbon nitride Molten salt Photocatalytic |
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