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

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Abstract A variety of compounds have been treated with lit semiconductors for water pollution treatment. UV irradiation with oxidants or catalysts (TiO 2 ) can remediate industrial effluent. The goal of this study is to prepare and characterize TiO 2 –SnO 2 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 TiO 2 –SnO 2 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 SnO 2 (0–20 wt.%), and then by employing an inorganic antioxidant (H 2 O 2 , Na 2 S 2 O 8 , NaIO 4 ) with a ratio of UV/TiO 2 –SnO 2 (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 SnO 2 –TiO 2 nanocrystals were examined. The UV/TiO 2 –SnO 2 (90:10) wt.% has higher photocatalytic efficiency for degradation acid red 37 dye from either TiO 2 , SnO 2 or the other ratios in this study.

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