Fabrication of porous TiO2 film on Ti foil by hydrothermal process and its photocatalytic efficiency and mechanisms with ethyl violet dye

Fu Der Mai, Wen Lian William Lee, Jia Lin Chang, Shou Ching Liu, Chia Wei Wu, Chiing Chang Chen

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Most of commercial dyes and pigments have rather complicated polyaromatic chemical structures with prolonged lifetime surviving in the Mother Nature. However, TiO2 has been reported as one of the best photocatalytic candidates for degrading dye pollutants. In this report, TiO2 film/Ti foil was prepared by hydrothermal reaction in alkali solution, the porous TiO2 film with microcrystalline structure has been obtained. The porous structure of TiO2 film was analyzed and characterized by XRD, FE-SEM and XPS. This is the first report that demonstrates that TiO2 film/Ti foil has an excellent commercial application potential for photocatalytic degradation of Ethyl Violet (EV). Especially, because of refluxing at 100°C, the porous TiO2 film structure remained undisturbed, and EV decomposed in the period of 20h. In addition, porous TiO2-mediated EV photo degradation mechanism has been proposed, as intermediates are isolated and clearly identified by GC-MS and HPLC-PDA-ESI-MS.

Original languageEnglish
Pages (from-to)864-875
Number of pages12
JournalJournal of Hazardous Materials
Volume177
Issue number1-3
DOIs
Publication statusPublished - May 2010

Keywords

  • Ethyl violet
  • Hydrothermal process
  • Photocatalytic
  • Porous TiO film/Ti foil

ASJC Scopus subject areas

  • Health, Toxicology and Mutagenesis
  • Pollution
  • Waste Management and Disposal
  • Environmental Chemistry
  • Environmental Engineering

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