Abstract

Graphitic carbon nitride (g-C3N4) is known to photogenerate hydrogen peroxide in the presence of hole quenchers in aqueous environments. Here, the g-C3N4 photocatalyst is embedded into a host polymer of intrinsic microporosity (PIM-1) to provide recoverable heterogenized photocatalysts without loss of activity. Different types of g-C3N4 (including Pt@g-C3N4, Pd@g-C3N4, and Au@g-C3N4) and different quenchers are investigated. Exploratory experiments yield data that suggest binding of the quencher either (i) directly by adsorption onto the g-C3N4 (as shown for α-glucose) or (ii) indirectly by absorption into the microporous polymer host environment (as shown for Triton X-100) enhances the overall photochemical H2O2 production process. The amphiphilic molecule Triton X-100 is shown to interact only weakly with g-C3N4 but strongly with PIM-1, resulting in accumulation and enhanced H2O2 production due to the microporous polymer host.

Original languageEnglish
Pages (from-to)19938–19948
Number of pages11
JournalACS Applied Materials and Interfaces
Volume14
Issue number17
Early online date24 Apr 2022
DOIs
Publication statusPublished - 4 May 2022

Keywords

  • adsorption
  • bipolar photocatalysis
  • disinfection
  • hydrogen generation
  • hydrogen peroxide

ASJC Scopus subject areas

  • Materials Science(all)

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