Journal
RSC ADVANCES
Volume 10, Issue 50, Pages 29633-29641Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ra03773g
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Funding
- INST Mohali
- Department of Science and Technology, India (DST) [SR/NM/NT-06/2016]
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Metal-free organic polymer photocatalysts have attracted dramatic attention in the field of visible light-induced hydrogen evolution reaction (HER). Herein, we showed a polymeric O-linked heptazine polymer (OLHP) decorated with S, N co-doped graphene quantum dots (S,N-GQDs) as a photosensitizer to generate hydrogen upon quantum dot sensitization. Both of these heptazine-based systems show effective photosensitization with strong pi-pi interactions and enhanced photocatalytic H(2)generation (24 times) as metal-free systems. Electrochemical impedance and optical measurements show effective charge transfer kinetics with decreased charge recombination, which is responsible for the enhanced photocatalytic activity. As a result, a significant high apparent quantum yield (AQY) with highest value of 10.2% was obtained for our photocatalyst OLHP/S,N-GQD10.
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