3.1.2. Impregnation

During the impregnation process, the combination of noble metal and semiconductor nanostructures is achieved through the attachment of noble metal precursor onto semiconductor substrate due to the van der Waals force, coulomb force or some other interactions between them. Typically, in the work of Lin et al., H2PtCl6 was added into a suspension of TiO2 (B) nanofibers. Then the solvent was evaporated under stirring. Then, the as-obtained powders were heated in a reducing atmosphere to reduce H2PtCl6 absorbed on TiO2 (B) nanofibers, leading to the formation of Pt-decorated TiO2 (B) nanofibers [49].
