Cobalt-doped alumina catalysts in catalytic oxidation of tartrazine induced by Oxone®

Abstract

In this work cobalt-doped alumina catalysts were synthetized using the sol-gel method. The calcination temperatures were 500 °C, 1000 °C and 1100 °C and the catalysts were denoted as CoA-500, CoA-1000 and CoA-110, respectively. The obtained catalysts were tested as Oxone® activators for the degradation of tartrazine azo-dye. The influence of the mass of catalyst and the reaction temperature was investigated. The catalyst mass and temperature increase were beneficial for the dye degradation rate. All three catalysts were found to be effective for tartrazine degradation in the presence of Oxone®.