Abstract
Due to the fact that TiO2 semiconductor has a profound surface and a porous structure, this compound shows a high photocatalytic activity among other similar counterparts. The wide band gap of TiO2 (∼3.2 eV) and existing defects in the structure of this material provides desirable efficacy to enhance absorption of visible-region of the solar energy. Therefore, introducing narrower band-gap semiconductors next to TiO2 is an effective route to expand the range of sunlight absorption in composite photocatalysts. The purpose of this research is to prepare TiO2/AgSbO3 nanophotocatalyst by the well-known hydrothermal method, then, characterized by FT-IR, XRD, EDX, DRS, and FE-SEM. After that, the nanophotocatalyst was performed in the multi-component synthesis of some pharmaceutically important 2-substituted benzimidazoles. This study confirmed that hydroxyl radical, superoxide anion radical, and holes are viable contributing mediators in the photocatalytic process. Speeding up the reaction, green nature, cost-effectiveness and non-toxicity of the nanophotocatalyst are highlight features of the present protocol.
Published Version
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