Enhanced rates photocatalytic degradation of acid red 37 dye by TiO2–SnO2 in solid state under UV-irradiation light

A variety of compounds have been treated with lit semiconductors for water pollution treatment. UV irradiation with oxidants or catalysts (TiO₂) can remediate industrial effluent. The goal of this study is to prepare and characterize TiO₂-SnO₂ nanocomposites with different ratios to degradation dyes in wastewater treatment. These nanocomposites will be used to photocatalysis degradation of acid red 37 dye in aqueous solution using UV irradiation as a model pollutant. The characterization of TiO₂-SnO₂ nanocomposites was conducted using XRD, TEM, EDAX, FTIR, and XPS. The photocatalytic degradation was tested with several advanced oxidation processes (AOPs) by adding varying concentrations of SnO₂ (0-20 wt.%), and then by employing an inorganic antioxidant (H₂O₂, Na₂S₂O₈, NaIO₄) with a ratio of UV/TiO₂-SnO₂ (90:10) to high efficiency of degradation of acid red 37 dye using a batch photoreactor. Consequently, the effects of pH, dye concentrations, and different loading (g/L) of nanocomposite on the photocatalytic activity of the SnO₂-TiO₂ nanocrystals were examined. The UV/TiO₂-SnO₂ (90:10) wt.% has higher photocatalytic efficiency for degradation acid red 37 dye from either TiO₂, SnO₂ or the other ratios in this study.