Improved photocatalytic efficiency of a WO3 system by an efficient visible-light induced hole transfer

Abstract

Amorphous Cu(II) nanoclusters grafted WO₃ particles were coated on a smooth TiO₂ film, and site selective depositions of PbO₂ and metal Ag particles by photocatalytic processes were observed on TiO₂ and WO₃ due to transfer of holes to TiO₂, and accumulation of electrons in WO₃ respectively. As a result, the photocatalytic activity of TiO₂ modified Cu(II)–WO₃ increased ∼3.5 fold higher than that of Cu(II)–WO₃.