Enhanced photocatalytic activity of TiO2 films by modification with polyethylene glycol

Álvaro A. Ramírez-Santos, Próspero Acevedo-Peña, Elcy M. Córdoba

Research output: Contribution to journalArticle in an indexed scientific journalpeer-review

22 Scopus citations

Abstract

Titanium dioxide porous thin films on the Anatase phase were deposited onto glass slides by the sol-gel method assisted with polyethylene glycol (PEG). The dip-coated films were characterized using scanning electron microscopy (SEM), thermogravimetric analysis (TGA and DTG), UV-visible spectroscopy and X-ray diffraction (XRD). The photocatalytic activity of the films was determined by means of methyl-orange oxidation tests. The resultant PEG-modified films were crack-free and developed a porous structure after calcination at 500 °C. Photo-oxidation tests showed the dependency of catalytic activity of the films on the number of layers (thickness) and porosity, i.e. of the interfacial area.

Original languageEnglish
Pages (from-to)1931-1935
Number of pages5
JournalQuimica Nova
Volume35
Issue number10
DOIs
StatePublished - 2012
Externally publishedYes

Keywords

  • Photocatalysis
  • Polyethylene glycol (PEG)
  • TiO films

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