Abstract
Sunlight harvesting nano heterostructure materials with excellent photocatalytic activity has received considerable attention in recent years. Here we meticulously investigated the effect of CdS nano crystal loading on the light absorption capacity and the photocatalytic activity of TiO2 nanomaterials by assembling TiO2-CdS heterostructures. A distinct heterostructure was established in the presently reported hybrid system with 10 wt% CdS incorporation into TiO2 and the photocatalytic study showed that TiO2-CdS10 has 3.5 times higher catalytic activity than bare TiO2. This superior photocatalytic performance is attributed to the excellent light absorption, high surface area and the slow rate of recombination of photogenerated charge carriers of TiO2-CdS10 hetero structures. A mechanism was also proposed for the CdS sensitized sunlight driven photocatalytic degradation of methyl orange dye in presence of CdS–TiO2 nano heterostructure.
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