Enhanced visible-light-driven photocatalytic removal of NO: Effect on layer distortion on g-C₃N₄ by H₂ heating

Wing Kei HO, Zizhong ZHANG, Mukun XU, Xianwen ZHANG, Xuxu WANG, Yu HUANG

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73 Citations (Scopus)

Abstract

We report a simple strategy for realizing the tunable structure distortion of graphitic carbon nitride (g-C₃N₄) layers by H₂ post calcination to improve the intrinsic electronic structure and the photocatalytic performances of g-C₃N₄ samples. In comparison with the O₂ or N₂ post treatment, the H₂-modified g-C₃N₄ develops new optical absorption above 460 nm and enhances photocatalytic activity for NO removal. The combined characterization results reveal that H₂ heating induced the structure distortion of g-C₃N₄ layers is originated from the creation of amino groups within the structure and generation of the strong hydrogen bonding interactions between layers. The distorted structure allows n–π* electron transitions in g-C₃N₄ to increase visible-light absorption. The structure distortion also enables more electrons to be available for initiating the photocatalytic reaction and the separation of photogenerated charge carriers in g-C₃N₄. This work provides a simple strategy for realizing the tunable structure distortion of g-C₃N₄ layers to adjust its electronic structure and photocatalysis. Copyright © 2015 Elsevier B.V.
Original languageEnglish
Pages (from-to)106-112
JournalApplied Catalysis B: Environmental
Volume179
Early online dateMay 2015
DOIs
Publication statusPublished - Dec 2015

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Carbon nitride
heating
Heating
carbon
Light absorption
Electronic structure
electron
Photocatalysis
Electron transitions
cyanogen
removal
effect
Charge carriers
Calcination
Hydrogen bonds
hydrogen
Electrons

Bibliographical note

Ho, W., Zhang, Z., Xu, M., Zhang, X., Wang, X., & Huang, Y. (2015). Enhanced visible-light-driven photocatalytic removal of NO: Effect on layer distortion on g-C₃N₄ by H₂ heating. Applied Catalysis B: Environmental, 179, 106-112. doi: 10.1016/j.apcatb.2015.05.010

Keywords

  • g-C₃N₄
  • Layer distortion
  • H₂ heating
  • NO removal
  • Photocatalysis