Copolymerization with 2,4,6-Triaminopyrimidine for the Rolling-up the Layer Structure, Tunable Electronic Properties, and Photocatalysis of g-C₃N₄

Wing Kei HO, Zizhong ZHANG, Wei LIN, Shuping HUANG, Xianwen ZHANG, Xuxu WANG, Yu HUANG

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113 Citations (Scopus)

Abstract

Copolymerization with 2,4,6-triaminopyrimidine (TAP) is developed for precise substitution of one nitrogen with carbon atom in the triazine ring of polymeric g-C₃N₄. Direct incorporation of C₄N₂ ring from TAP into the network retains the structural features of g-C₃N₄, but induces the rolling-up of g-C₃N₄ sheets into tubular configuration. The band gap energy is narrowed from 2.7 to 2.4 eV by a negative shift of valence band of the g-C₃N₄ photocatalyst, which enhances charge-carrier migration and separation, leading to higher photocatalytic activity for NO gas pollutant removal. It is attributed to the decrease of the π-deficiency and the generation of imbalanced electron density in π-electron conjugated units of g-C₃N₄ by TAP incorporation. This work provides a significant technique for precise control of heteroatom in the framework of g-C₃N₄ to finely adjust its intrinsic electronic properties and its photocatalytic properties. Copyright © 2015 American Chemical Society.
Original languageEnglish
Pages (from-to)5497-5505
JournalACS Applied Materials and Interfaces
Volume7
Issue number9
Early online dateFeb 2015
DOIs
Publication statusPublished - 2015

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Photocatalysis
Photocatalysts
Valence bands
Charge carriers
Electronic properties
Copolymerization
Carrier concentration
Energy gap
Substitution reactions
Nitrogen
Atoms
Carbon
Electrons
Gases
Triazines
2,4,6-triaminopyrimidine

Bibliographical note

Ho, W., Zhang, Z., Lin, W., Huang, S., Zhang, X., Wang, X., et al. (2015). Copolymerization with 2,4,6-Triaminopyrimidine for the Rolling-up the Layer Structure, Tunable Electronic Properties, and Photocatalysis of g-C₃N₄. ACS Applied Materials and Interfaces, 7(9), 5497-5505.

Keywords

  • g-C₃N₄
  • Copolymerization
  • Nitrogen substitution
  • Tubular configuration
  • Photocatalysis