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Title: Role of water adsorption in photoinduced superhydrophilicity on TiO{sub 2} thin films

Abstract

The ultraviolet (UV) irradiation of a titanium dioxide (TiO{sub 2}) film surface gives rise to two simultaneous phenomena: photocatalysis and superhydrophilicity. Photocatalysis has been thoroughly studied, but the mechanism governing superhydrophilicity remains controversial. The authors' investigations show the effects induced by UV irradiation on the water adsorption and desorption on the TiO{sub 2} surface. The observations prove that superhydrophilicity cannot be solely induced by the removal of organic contamination via photocatalysis, but is associated with water adsorption most probably due to the appearance of hydroxyl groups on surface defects.

Authors:
; ;  [1]
  1. Service de Physique de l'Etat Condense (CNRS URA 2464), DSM/DRECAM/SPEC, CEA Saclay, 91191 Gif sur Yvette Cedex (France)
Publication Date:
OSTI Identifier:
20971902
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 90; Journal Issue: 18; Other Information: DOI: 10.1063/1.2737132; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ADSORPTION; DESORPTION; HYDROXIDES; PHOTOCATALYSIS; THIN FILMS; TITANIUM OXIDES; WATER

Citation Formats

Lee, Fuk Kay, Andreatta, Gaeelle, and Benattar, Jean-Jacques. Role of water adsorption in photoinduced superhydrophilicity on TiO{sub 2} thin films. United States: N. p., 2007. Web. doi:10.1063/1.2737132.
Lee, Fuk Kay, Andreatta, Gaeelle, & Benattar, Jean-Jacques. Role of water adsorption in photoinduced superhydrophilicity on TiO{sub 2} thin films. United States. doi:10.1063/1.2737132.
Lee, Fuk Kay, Andreatta, Gaeelle, and Benattar, Jean-Jacques. Mon . "Role of water adsorption in photoinduced superhydrophilicity on TiO{sub 2} thin films". United States. doi:10.1063/1.2737132.
@article{osti_20971902,
title = {Role of water adsorption in photoinduced superhydrophilicity on TiO{sub 2} thin films},
author = {Lee, Fuk Kay and Andreatta, Gaeelle and Benattar, Jean-Jacques},
abstractNote = {The ultraviolet (UV) irradiation of a titanium dioxide (TiO{sub 2}) film surface gives rise to two simultaneous phenomena: photocatalysis and superhydrophilicity. Photocatalysis has been thoroughly studied, but the mechanism governing superhydrophilicity remains controversial. The authors' investigations show the effects induced by UV irradiation on the water adsorption and desorption on the TiO{sub 2} surface. The observations prove that superhydrophilicity cannot be solely induced by the removal of organic contamination via photocatalysis, but is associated with water adsorption most probably due to the appearance of hydroxyl groups on surface defects.},
doi = {10.1063/1.2737132},
journal = {Applied Physics Letters},
number = 18,
volume = 90,
place = {United States},
year = {Mon Apr 30 00:00:00 EDT 2007},
month = {Mon Apr 30 00:00:00 EDT 2007}
}