Enhancement of photocatalytic activity by metal deposition:: characterisation and photonic efficiency of Pt, Au and Pd deposited on TiO2 catalyst

Pt, An and Pd deposited TiO2 have been prepared and characterised by surface analytical methods such as surface area, XRD, and scanning electron micrograph and photophysical characterisation by diffuse reflectance spectroscopy. The photocatalytic activity of the doped catalysts was ascertained by the photo-oxidation of leather dye, acid green 16 in aqueous solution illuminated with low-pressure mercury lamp (similar to254nm). The effect of metal contents on the photocatalytic activity was investigated. The highest photonic efficiency was observed with metal deposition level of less than 1 wt%. (C) 2004 Elsevier Ltd. All rights reserved.