In situ formation of heterojunctions in modified graphitic carbon nitride: Synthesis and noble metal free photocatalysis

Menny Shalom*, Miguel Guttentag, Christian Fettkenhauer, Sahika Inal, Dieter Neher, Antoni Llobet, Markus Antonietti

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

142 Scopus citations

Abstract

Herein, we report the facile synthesis of an efficient roll-like carbon nitride (C3N4) photocatalyst for hydrogen production using a supramolecular complex composed of cyanuric acid, melamine, and barbituric acid as the starting monomers. Optical and photocatalytic investigations show, along with the known red shift of absorption into the visible region, that the insertion of barbituric acid results in the in situ formation of in-plane heterojuctions, which enhance the charge separation process under illumination. Moreover, platinum as the standard cocatalyst in photocatalysis could be successfully replaced with first row transition metal salts and complexes under retention of 50% of the catalytic activity. Their mode of deposition and interaction with the semiconductor was studied in detail. Utilization of the supramolecular approach opens new opportunities to manipulate the charge transfer process within carbon nitride with respect to the design of a more e fficient carbon nitride photocatalyst with controlled morphology and optical properties. (Chemical Equation Presented).

Original languageEnglish (US)
Pages (from-to)5812-5818
Number of pages7
JournalChemistry of Materials
Volume26
Issue number19
DOIs
StatePublished - Oct 14 2014

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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