Synthesis, characterization and catalytic activity of nano size semiconductor metal oxide in a visible light batch slurry photoreactor

► Nano sized ZnO synthesized through sol-gel process and characterized ► Nano size of the catalyst was established by TEM and XRD analysis. ► Visible photocatalytic activity tested with amido black 10B dye as a model pollutant ► Complete degradation observed at neutral pH and kinetics had also been studied. ► Mineralization of dye molecules analysed by HPLC and ESI-Mass analysis