A true oxygen-linked heptazine based polymer for efficient hydrogen evolution

V. R. Battula, Sunil Kumar, D. K. Chauhan, Soumadri Samanta, Kamalakannan Kailasam

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

O-doped/functional g-CN polymers are promising materials which have been reported to modify inherent electronic structure and light harvest ability of the g-C3N4 based photocatalysts. However, the doping position and concentration of hetero atom remains ill-defined although enhanced photocatalytic activity of modified g-CN photocatalysts has been reported. Herein, a facile two step procedure to synthesize heptazine polymer with defined O-atom position in polymer structure is presented. Cyameluric acid, a member of cyamelurine family upon polycondensation under inert atmosphere ensures the insertion of O-atom at bridge position between heptazine units in growing polymer. The developed polymer OLHP (oxygen linked heptazine polymer) attains high hydrogen production efficiency likely due to high O-content and efficient charge separation evident from PL spectra compared to g-CN. This heptazine based precursor design also eliminates the possibility of presence of triazine based moiety defects in g-C3N4 polymers.

Original languageEnglish
Pages (from-to)313-319
Number of pages7
JournalApplied Catalysis B: Environmental
Volume244
DOIs
StatePublished - 5 May 2019
Externally publishedYes

Keywords

  • Carbon nitride
  • Cyameluric acid
  • Heptazine
  • Heterogeneous photocatalysis
  • Water splitting

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science (all)
  • Process Chemistry and Technology

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