Enhanced photocatalytic activity of potassium-doped titania photocatalyst films with nanosheet structure

Sujun Guan, Taito Watabe, Liang Hao, Hiroyuki Yoshida, Yanling Cheng, Kaowen Zhou, Yun Lu

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Potassium-doped titania (K-doped TiO 2 ) films had been prepared by molten-salt treatment in KNO 3 for Ti-TiC coatings, containing different amount of TiC, in order to achieve enhanced activity of the films. When the amount of TiC is lower than 40%, the partial surface morphology of K-doped TiO 2 films clearly shows a nanosheet structure, and the formed nanosheets could increase the accessible surface area. The results show that K-doped TiO 2 with composite crystals has formed with different amount of TiC, and the relative Raman peak intensity of Ti-O-K bonding is highest for 40% TiC. Even avoiding high adsorption of K-doped TiO 2 films, the films exhibit excellent and stable photocatalytic activity. With increasing the amount of TiC, the photocatalytic activity of K-doped TiO 2 films first increases then decreases, reaching the highest for 40% TiC.

Original languageEnglish (US)
Pages (from-to)174-178
Number of pages5
JournalMaterials Letters
Volume242
DOIs
StatePublished - May 1 2019
Externally publishedYes

Keywords

  • K-doped TiO
  • Molten salt of KNO
  • Nanosheet
  • Photocatalyst films
  • Photocatalytic activity

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