N-TiO2-coated polyester filters for visible light - Photocatalytic removal of gaseous toluene under static and dynamic flow conditions

Li Zhang, Pei Yun Tan, Chiew Keat Lim, Xiao Guo, Man Siu Tse, Ooi Kiang Tan, Victor W. C. Chang

Research output: Contribution to journalArticleResearchpeer-review

14 Citations (Scopus)


The present work aims to utilize N-TiO2 coating for decontamination of gaseous pollutants under normal room light irradiation. N-TiO2 nanoparticles were prepared by incomplete thermal oxidation of TiN at different temperatures to achieve self-doping of TiO2 to improve simultaneously the structural, morphological, and electronic properties of conventional TiO2 photocatalyst. The thermal evolution of TiN to oxygen-rich titanium oxynitride (N-TiO2) and subsequently TiO2 at different temperatures is characterized systematically by different tools including XRD, TEM, XPS, UV-vis diffuse reflectance and SPV responses. The synthesized N-TiO2 was coated onto polyester filters using a facile spray coating method. The excellent photocatalytic performance was successfully demonstrated on mineralization of gaseous toluene with fluorescent light irradiation under both static and dynamic flow conditions in a comprehensive custom-built photocatalytic test system. Therefore, it shows promising potential to be utilized in practical air purification applications.

Original languageEnglish
Pages (from-to)357-364
Number of pages8
JournalJournal of Environmental Chemical Engineering
Issue number1
Publication statusPublished - 1 Mar 2016
Externally publishedYes


  • Coating
  • N-TiO
  • Photocatalysis
  • Reactors
  • Toluene
  • Visible light

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