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N-loaded TiO2 for photocatalytic degradation of methyl orange under visible light irradiation

Journal Article


Abstract


  • Nitrogen-loaded TiO2 (N-loaded TiO2), a visible-light driven catalyst, was successfully synthesized by the modified sol-gel method. Physical characterizations of the as-prepared catalysts have been performed by using X-ray diffraction (XRD), Diffuse reflectance UVvisspectroscopy(DRUVvis), Raman spectroscopyand BETspecific surface areain order to obtain structure-activity relationship. Results from Raman spectroscopy clearly suggested that N atoms were incorporated into the TiO2 crystal lattice as evidenced by the vibrational peak of TiN in TiO2-xNx.DR UVvis results also suggested that the nitrogen dopant might be responsible for narrowing the TiO2band gap energy, thus resulting in a shift towards the visiblelight region. Photocatalytic activity of N-loaded TiO2 evaluated through the degradation of methyl orange (MO)under visible light irradiation (l> 400 nm) indicated that all N-loaded photocatalysts exhibited significantly higher activities than the unloaded TiO2 and Degussa P25 TiO2. According to the results from DR UV-vis, XRD and BET studies, the enhanced photoactivity observed from N-loaded samples might be due to a decrease in TiO2 band gap energy and/or changes in chemical and physical properties of the materials upon loading with nitrogen.

UOW Authors


  •   Boonprakob, Natkritta (external author)
  •   Wetchakun, Natda (external author)
  •   Phanichphant, Sukon (external author)
  •   Chen, Jun
  •   Inceesungvorn, Burapat (external author)

Publication Date


  • 2013

Citation


  • Boonprakob, N., Wetchakun, N., Phanichphant, S., Chen, J. & Inceesungvorn, B. (2013). N-loaded TiO2 for photocatalytic degradation of methyl orange under visible light irradiation. Advanced Materials Research, 622-623 883-888.

Scopus Eid


  • 2-s2.0-84872711586

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/550

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 883

End Page


  • 888

Volume


  • 622-623

Place Of Publication


  • Switzerland

Abstract


  • Nitrogen-loaded TiO2 (N-loaded TiO2), a visible-light driven catalyst, was successfully synthesized by the modified sol-gel method. Physical characterizations of the as-prepared catalysts have been performed by using X-ray diffraction (XRD), Diffuse reflectance UVvisspectroscopy(DRUVvis), Raman spectroscopyand BETspecific surface areain order to obtain structure-activity relationship. Results from Raman spectroscopy clearly suggested that N atoms were incorporated into the TiO2 crystal lattice as evidenced by the vibrational peak of TiN in TiO2-xNx.DR UVvis results also suggested that the nitrogen dopant might be responsible for narrowing the TiO2band gap energy, thus resulting in a shift towards the visiblelight region. Photocatalytic activity of N-loaded TiO2 evaluated through the degradation of methyl orange (MO)under visible light irradiation (l> 400 nm) indicated that all N-loaded photocatalysts exhibited significantly higher activities than the unloaded TiO2 and Degussa P25 TiO2. According to the results from DR UV-vis, XRD and BET studies, the enhanced photoactivity observed from N-loaded samples might be due to a decrease in TiO2 band gap energy and/or changes in chemical and physical properties of the materials upon loading with nitrogen.

UOW Authors


  •   Boonprakob, Natkritta (external author)
  •   Wetchakun, Natda (external author)
  •   Phanichphant, Sukon (external author)
  •   Chen, Jun
  •   Inceesungvorn, Burapat (external author)

Publication Date


  • 2013

Citation


  • Boonprakob, N., Wetchakun, N., Phanichphant, S., Chen, J. & Inceesungvorn, B. (2013). N-loaded TiO2 for photocatalytic degradation of methyl orange under visible light irradiation. Advanced Materials Research, 622-623 883-888.

Scopus Eid


  • 2-s2.0-84872711586

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/550

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 883

End Page


  • 888

Volume


  • 622-623

Place Of Publication


  • Switzerland