Abstract
The health hazards generated from textile and dye industries wastewater which are most carcinogenic and they poses a danger to human and aquatic biota. The present work investigates the degradation of dye pollutants such as Eosin yellow (EY) and Brilliant green (BG) under visible light irradiation using SnO2/Fe2O3/Ag nanocomposite. This nanocomposite was prepared by hydrothermal route and characterized by various instrument techniques like XRD, FTIR, FESEM, EDS, HRTEM, UV–Vis DRS, PL and UV–Vis spectrophotometer for determine its crystalline phase, morphology, bandgap and photocatalytic efficiency. The photocatalytic activity of nanocomposite was tested on both dyes EY and BG under visible light irradiation and the experimental results declared that this composite shown better photocatalytic activity in basic solution degraded 93% of BG and 95% of EY in 75 min and 60 min, respectively under the normalised conditions such as basic pH, 30 mg catalyst dose and 10 mg/L of dye solution concentration without any oxidants such as H2O2. This is due to lower bandgap energy of SnO2/Fe2O3/Ag nanocomposite (1.78 eV) and thus shows the red shift, making it active in the visible region, resulting in higher photocatalytic activity. This was proved by compare the photocatalytic efficiency with SnO2 and SnO2/Fe2O3 shown lesser photocatalytic degradation efficiency over EY and BG under visible light irradiation.
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