Photocatalytic Decolourization of Bromophenol Blue in Aqueous Solution with Cu(II)-Peroxo Complexes in Presence of SDS

Abstract

In the current work, the photocatalytic decolourization of Bromophenol blue (BrPB) with Cu(II)-peroxo complexes in presence of sodium dodecyl sulfate (SDS) under UV light was investigated. The analytical parameters such as pH, titanium dioxide (TiO2) catalyst dosage, initial concentration of the dye, amounts of H2O2, Cu(II) and SDS affecting the photocatalytic decolourization of BrPB were studied. The obtained optimal values were as follows: pH 6.0, 55 mmol L-1 H2O2, 60 μg L-1 Cu(II), 0.02 mmol L-1 SDS, 5 mg L-1 dye, 1.0 g L-1 TiO The percent removals have been obtained as 81.6% and 76.3% for TiO2 -UV-H2O2-Cu(II) system with and without SDS while they are 74.3% and 66.2% for TiO2-UV system with and without H2O2 under the optimized conditions. Consequently, it has been observed that the maximum removal rate is obtained for TiO2 -UV-H2O2-Cu(II) in presence of SDS at premicellar region with a value of 81.6%. The removal rate of the dye was monitored by measuring the absorbance at 592 nm, using UV-visible spectrophotometer.