Photocatalytic Deposition of Gold on Nanocrystalline TiO2 Films

Ivanka Ruvarac-Bugarčić,1 Ivana Janković,1 Zorica Konstantinović,2 Zoran Šaponjić1 and Jovan Nedeljković1*

1Vinča Institute of Nuclear Sciences, P. O. Box 522, 11001 Belgrade, Serbia
2Departament de Física Fonamental and Institut de Nanociència i Nanotecnologia, Universitat de Barcelona, Martíi Franquès 1, 08028 Barcelona, Spain
* Corresponding author: E-mail:

Nanocrystalline TiO2 films were prepared on glass supports by the dip coating technique using colloidal solutions consisting of 45 Å TiO2 particles as a precursor in order to probe the feasibility of exploiting solid state photocatalytic reactions for efficient deposition of gold. The reduction of Au3+ ions was maintained by photoirradiation of unmodified Ti-O2 films with metal ions being attached directly to the surface of TiO2. Absorption spectrum as well as atomic force microscopy measurements revealed presence of gold grains in the nanosize regime. Conductivity of deposited gold was measured in the temperature range from 45 to 295 K.

Keywords: TiO2 films, gold, photocatalytic deposition, conductivity