Skip to main content

A facile method of activating graphitic carbon nitride for enhanced photocatalytic activity

Journal Article


Abstract


  • Activated graphitic carbon nitride (g-C3N4) with enhanced photocatalytic capability under visible light irradiation was fabricated by using a facile chemical activation treatment method. In the chemical activation, a mixed solution of hydrogen peroxide and ammonia was employed. The yield can reach as high as 90% after the activation process. The activation process did not change the crystal structure, functional group, morphology and specific surface area of pristine g-C3N4, but it introduced H and O elements into the CN framework of g-C3N4, resulting in a broader optical absorption range, higher light absorption capability and more efficient separation of photogenerated electrons and holes. The photoactivity was investigated by the degradation of rhodamine B (RhB) under visible light irradiation. As compared to the pristine g-C3N4, the activated g-C3N4 exhibited a distinct and efficient two-step degradation process. It was found that the RhB dye in the activated g-C3N4 was mainly oxidized by the photogenerated holes. It is believed that sufficient holes account for the two-step degradation process because they would significantly improve the efficiency of the N-de-ethylation reaction of RhB.

Authors


  •   Liao, Yongliang (external author)
  •   Zhu, Shenmin (external author)
  •   Chen, Zhixin
  •   Lou, Xianghong (external author)
  •   Zhang, Di (external author)

Publication Date


  • 2015

Citation


  • Liao, Y., Zhu, S., Chen, Z., Lou, X. & Zhang, D. (2015). A facile method of activating graphitic carbon nitride for enhanced photocatalytic activity. Physical Chemistry Chemical Physics, 17 (41), 27826-27832.

Scopus Eid


  • 2-s2.0-84944235429

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/4797

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 27826

End Page


  • 27832

Volume


  • 17

Issue


  • 41

Place Of Publication


  • United Kingdom

Abstract


  • Activated graphitic carbon nitride (g-C3N4) with enhanced photocatalytic capability under visible light irradiation was fabricated by using a facile chemical activation treatment method. In the chemical activation, a mixed solution of hydrogen peroxide and ammonia was employed. The yield can reach as high as 90% after the activation process. The activation process did not change the crystal structure, functional group, morphology and specific surface area of pristine g-C3N4, but it introduced H and O elements into the CN framework of g-C3N4, resulting in a broader optical absorption range, higher light absorption capability and more efficient separation of photogenerated electrons and holes. The photoactivity was investigated by the degradation of rhodamine B (RhB) under visible light irradiation. As compared to the pristine g-C3N4, the activated g-C3N4 exhibited a distinct and efficient two-step degradation process. It was found that the RhB dye in the activated g-C3N4 was mainly oxidized by the photogenerated holes. It is believed that sufficient holes account for the two-step degradation process because they would significantly improve the efficiency of the N-de-ethylation reaction of RhB.

Authors


  •   Liao, Yongliang (external author)
  •   Zhu, Shenmin (external author)
  •   Chen, Zhixin
  •   Lou, Xianghong (external author)
  •   Zhang, Di (external author)

Publication Date


  • 2015

Citation


  • Liao, Y., Zhu, S., Chen, Z., Lou, X. & Zhang, D. (2015). A facile method of activating graphitic carbon nitride for enhanced photocatalytic activity. Physical Chemistry Chemical Physics, 17 (41), 27826-27832.

Scopus Eid


  • 2-s2.0-84944235429

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/4797

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 27826

End Page


  • 27832

Volume


  • 17

Issue


  • 41

Place Of Publication


  • United Kingdom