Photocatalytic activities of Pd-loaded mesoporous TiO2 thin films

Chih Chieh Chan, Chung Chieh Chang, Chia Wen Hsu, Shih Kai Wang, Jerry Lin

Research output: Contribution to journalArticlepeer-review

107 Citations (Scopus)


In the present study, transparent nanocrystalline Pd-TiO2 films were prepared by a sol-gel spin coating technique. By introducing non-ionic surfactant Triton X-100 into the sol, transparent mesoporous Pd-TiO2 films were also prepared after calcination at 500 °C. To reveal the structural and morphological differences, the as-prepared TiO2 and Pd-TiO2 films were characterized by scanning electron microscope with energy dispersive spectrometer, thermal gravimetric analysis, X-ray diffraction and UV-vis spectrophotometer. In addition, the photocatalytic activities of these films were investigated by degrading methylene blue under UV and visible light irradiation. Sol-gel TiO2 film, processed without surfactant, exhibited a pore-free smooth surface. Mesoporous TiO2 and Pd-TiO2 films with pore sizes ranging from 4 to 20 nm were obtained when surfactant was introduced and removed after calcination. In this study, the mesoporous Pd-TiO2 film with molar ratio of Pd/Ti = 0.05 exhibited the best photocatalytic activity while specifically maintained good transparency.

Original languageEnglish
Pages (from-to)492-497
Number of pages6
JournalChemical Engineering Journal
Issue number2-3
Publication statusPublished - Oct 15 2009
Externally publishedYes


  • Mesoporous
  • Pd-loaded
  • Photocatalytic
  • Spin coating
  • TiO thin film

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Chemistry
  • Industrial and Manufacturing Engineering
  • Environmental Chemistry


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