Synthesis of mesoporous polymeric carbon nitride exhibiting enhanced and durable visible light photocatalytic performance

Fan DONG, Yuhan LI, Wing Kei HO, Haidong ZHANG, Min FU, Zhongbiao WU

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21 Citations (Scopus)

Abstract

A thiourea precursor was employed to synthesize mesoporous carbon nitride (C₃N₄) by a thermal polycondensation process with high surface area SiO₂ and nanosphere SiO₂ as two types of hard templates. The resultant mesoporous C₃N₄ samples have high surface areas (105–112 m²/g) and mesopores with narrow sizes distribution (9.3 nm). Photocatalytic performance was evaluated by removal of NO in air under visible light irradiation. The results showed that mesoporous C₃N₄ samples exhibited significantly improved photocatalytic activity in comparison with bulk C₃N₄, which also exceeded that of N-doped TiO₂ and C-doped TiO₂. The activity enhancement can be ascribed to the synergistic effects of large surface area and pore volume, enhanced light-harvesting ability, increased redox potential, and reduced recombination of charge carriers. In addition to the high activity, the mesoporous C₃N₄ samples also showed high photochemical stability. The mesoporous C₃N₄ photocatalysts with enhanced and durable activity could provide a new efficient material for environmental pollution control. Copyright © 2014 Science China Press and Springer-Verlag Berlin Heidelberg.
Original languageEnglish
Pages (from-to)688-698
JournalChinese Science Bulletin
Volume59
Issue number7
DOIs
Publication statusPublished - Mar 2014

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Thiourea
Pollution control
Nanospheres
Polycondensation
Photocatalysts
Charge carriers
cyanogen
Irradiation
Air
Hot Temperature
Oxidation-Reduction

Bibliographical note

Dong, F., Li, Y., Ho, W., Zhang, H., Fu, M., & Wu, Z. (2014). Synthesis of mesoporous polymeric carbon nitride exhibiting enhanced and durable visible light photocatalytic performance. Chinese Science Bulletin, 59(7), 688-698.

Keywords

  • Carbon nitride
  • Mesoporous
  • Silica template
  • Visible light photocatalysis
  • No removal