Preparation of nanosmooth potassium tetratitanate films by sol-gel method

Qing Hua Qian*, Yang Bai, Xue Feng Zhou, Chang Liu, Xin Feng, Xiao Hua Lu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A new nanosmooth potassium tetratitanate film was prepared on glass substrates by a sol-gel method using Ti(n-OC4H9)4 and CH3COOK as precursors. The surface structure of the film was analyzed by atomic force microscope (AFM). The crystal growth of potassium tetratitanate was characterized by TG and XRD. The photocatalytic decomposition of octadecyltrichlorosilane (OTS) based self-assembled monolayers (SAMs) formed on K2Ti4O9 films was studied by using contact angle analysis. The results show that the films consist of flat particles with the ratio of diameter to height about 11. The root mean square roughness (RMS) of the films measured on an area of 2 μm × 2 μm in AFM images is 4.1 nm. Densely packed OTS-SAMs similar in quality to those on TiO2 are formed on K2Ti4O9. K2Ti4O9 efficiently decomposes OTS-SAMs under UV irradiation in air.

Original languageEnglish
Pages (from-to)749-753
Number of pages5
JournalWuji Cailiao Xuebao/Journal of Inorganic Materials
Issue number4
Publication statusPublished - 1 Jul 2007


  • Atomic force microscope
  • Photocatalysis
  • Potassium tetratitanate film
  • Sol-gel process


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