Synthesis of reduced graphene oxide decorated with Sn/Na doped TiO2 nanocomposite: a photocatalyst for Evans blue dye degradation

The major drawbacks associated with existed nanophotocatalyst are mild response, narrow spectrum range, hence speedy recombination of electrons, and holes subsequently less number of charge separation which leads to lower the overall efficiency of the catalyst. In order to overcome from this drawback, we have synthesized a nano-spherical shaped reduced graphene oxide NS-rGO (NC1) decorated with modified tin and sodium-doped titanium oxide nanocomposite NS-rGO@Sn/Na-doped-TiO2 (NC2). The synthesized NC2 decreases the probability of recombination of electrons and holes which is the necessary requirement for any photocatalyst and is rather, more advantageous compared to the reported photocatalyst which have demerits of speedy recombination of electrons and holes. The newly synthesized NC2 is used as an efficient photocatalyst for Evans blue dye degradation. This photocatalyst exhibits significant progress on light absorption, narrow band gap, active charge collection, and separation. The photocatalytic degradation of NC2 showed high activity in a short duration of time. The geometry of the NS-rGO facilitates collection and transporting of electrons in an effective photocatalytic dye degradation process. The investigation may lead to the development of novel photocatalyst for the degradation of toxic dye which is discharged into sewage from various chemical industries.