Supramolecular Chemistry in Molten Sulfur: Preorganization Effects Leading to Marked Enhancement of Carbon Nitride Photoelectrochemistry

Jingsan Xu, Shaowen Cao, Thomas Brenner, Xiaofei Yang, Jiaguo Yu, Markus Antonietti, Menny Shalom

Research output: Contribution to journalArticlepeer-review

73 Scopus citations

Abstract

Here, a new method for enhancing the photoelectrochemical properties of carbon nitride thin films by in situ supramolecular-driven preorganization of phenyl-contained monomers in molten sulfur is reported. A detailed analysis of the chemical and photophysical properties suggests that the molten sulfur can texture the growth and induce more effective integration of phenyl groups into the carbon nitride electrodes, resulting in extended light absorption alongside with improved conductivity and better charge transfer. Furthermore, photophysical measurements indicate the formation of sub-bands in the optical bandgap which is beneficial for exciton splitting. Moreover, the new bands can mediate hole transfer to the electrolyte, thus improving the photooxidation activity. The utilization of high temperature solvent as the polymerization medium opens new opportunities for the significant improvement of carbon nitride films toward an efficient photoactive material for various applications.

Original languageEnglish
Pages (from-to)6265-6271
Number of pages7
JournalAdvanced Functional Materials
Volume25
Issue number39
DOIs
StatePublished - 1 Oct 2015
Externally publishedYes

Keywords

  • carbon nitride thin film
  • charge transfer
  • molten sulfur
  • photoelectrochemistry

ASJC Scopus subject areas

  • Chemistry (all)
  • Materials Science (all)
  • Condensed Matter Physics

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