Effects of cationic and anionic micelles on the redox reaction of Erythrosine B by H₂O₂ in presence of Cu‐Fe nanoparticles

Abstract

Kinetic investigation of the degradation of Erythrosine B (EB) by H2O2 and copper‐iron bimetallic nanoparticles was carried out spectrophotometrically. The degradation was carried out under the condition of sonication at 40°C. The co‐precipitation method was used for the fabrication of CuO/Fe2O3 (Cu‐Fe) in an alkaline solution and characterized by SEM, XRD, FTIR, TEM, EDS, and BET methods. In the absence of the Cu‐Fe, no degradation of EB by H2O2 was observed. The presence of Cu‐Fe resulted into the degradation of EB by H2O2. The kinetics of the degradation was studied under the conditions of variation of the amount of nanoparticles and at different concentrations of EB, H2O2, H+, surfactants (sodium dodecyl sulphate; SDS and cetyltrimethylammonium bromide; CTABr). The rate of reaction depends on the amount of Cu‐Fe and [H2O2]. The rate constant values gave the peaked like curve (with maximum value at pH 3) at different pH. The dye degradation decreased with the increase in presence of (SDS) and (CTABr).