The behavior of H2O on clean and trimethylacetate (TMA)-covered TiO2(110)-(1x1), prepared with or without oxygen vacancies and associated Ti3?, reveals the hydrophilic nature of clean surfaces and the hydrophobic nature of TMA-covered surfaces. UV irradiation of a hydrophobic surface in the presence of 10-6 Torr of O2 removes TMA with a cross section of at least 10-17 cm2 photon-1 and rapidly restores hydrophilicity. The presence of oxygen vacancies does not detectably increase the hydrophilicity of either clean or TMA-covered TiO2(110).
Revised: May 18, 2004 |
Published: August 28, 2003
Citation
White J.M., J. Szanyi, and M.A. Henderson. 2003.The Photon-Driven Hydrophilicity of Titania: A Model Study Using TiO2(110) and Adsorbed Trimethyl acetate.Journal of Physical Chemistry B 107, no. 34:9029-9033.PNNL-SA-38444.