In this study, Fe2V4O13 nanoparticle (FeV2) as a hetero-Fenton catalyst was synthesized using a low-temperature hydrothermal method and characterized by X-ray, SEM, EDX, TEM and Raman techniques. The effectiveness of the heterogeneous Fenton catalyst of FeV2 towards the degradation and mineralization of indigo carmine dye (Ind, 0.1 mM) was studied by UV-Vis, ICP-MS and COD measurement. The optimal conditions for maximum degradation were pH 4, 66.7 mg/L of Fe2V4O13, 0.3 mM of initial H2O2 concentration with 0.1 mM of initial Ind concentration, at a reaction temperature of 298K. The effect of temperature on the reaction was also investigated, resulting in the activation energy of the reaction Ea = 53.5 kJ mol-1. Using the Eyring equation, activated parameters were calculated, indicating the controlling parameter is the activated enthalpy, the step of activated complex formation is an associative and endothermic reaction. It also performed that the FeV2 catalyst was highly influential in the degradation and mineralization of indigo carmine dye, with a degradation efficiency of more than 90% and 85% of COD after 10 minutes under the optimal operating condition. Additionally, the FeV2 catalyst displayed good stability after four cycles, indicating that Fe2V4O13 could be a promising catalyst for treating textile dye wastewater containing indigo carmine.
