A Rapid Microwave-Assisted Thermolysis Route to Highly Crystalline Carbon Nitrides for Efficient Hydrogen Generation

Yufei Guo, Jing Li, Yupeng Yuan, Lu Li, Mingyi Zhang, Chenyan Zhou, Zhiqun Lin

Research output: Contribution to journalArticlepeer-review

341 Scopus citations

Abstract

Highly crystalline graphitic carbon nitride (g-C3N4) with decreased structural imperfections benefits from the suppression of electron–hole recombination, which enhances its hydrogen generation activity. However, producing such g-C3N4materials by conventional heating in an electric furnace has proven challenging. Herein, we report on the synthesis of high-quality g-C3N4with reduced structural defects by judiciously combining the implementation of melamine–cyanuric acid (MCA) supramolecular aggregates and microwave-assisted thermolysis. The g-C3N4material produced after optimizing the microwave reaction time can effectively generate H2under visible-light irradiation. The highest H2evolution rate achieved was 40.5 μmol h−1, which is two times higher than that of a g-C3N4sample prepared by thermal polycondensation of the same supramolecular aggregates in an electric furnace. The microwave-assisted thermolysis strategy is simple, rapid, and robust, thereby providing a promising route for the synthesis of high-efficiency g-C3N4photocatalysts.

Original languageEnglish
Pages (from-to)14693-14697
Number of pages5
JournalAngewandte Chemie - International Edition
Volume55
Issue number47
DOIs
StatePublished - 14 Nov 2016

Bibliographical note

Publisher Copyright:
© 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

  • graphitic carbon nitride
  • microwave-assisted thermolysis
  • photocatalysis
  • supramolecular aggregates
  • water splitting

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