A new kind of preparation method of CdS/TiO 2 coupled semiconductor nanoparticle in aqueous solution is described, in which CdS is in situ formed on the surface of TiO 2. Furthermore, coupling of the two semiconductor particles via the bifunctional thiols offers an opportunity to sensitize TiO 2 with a large bandgap and energetically low lying conduction band by CdS with a small bandgap and an energetically high lying conduction band. IR spectra were used to follow the formation process of thi...
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