Quantum dot-sensitized O-linked heptazine polymer photocatalyst for the metal-free visible light hydrogen generation

Soumadri Samanta, Sunil Kumar, V. R. Battula, Arpna Jaryal, Neha Sardana, Kamalakannan Kailasam

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

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 π-π interactions and enhanced photocatalytic H2 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.

Original languageEnglish
Pages (from-to)29633-29641
Number of pages9
JournalRSC Advances
Volume10
Issue number50
DOIs
StatePublished - 11 Aug 2020
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering

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