Enhanced photo catalytic degradation of methyl orange using p-n CoO₃O₄-TiO₂hetero-junction as catalyst

Photo catalytic degradation of pollutants is one of the techniques used for treatment of dye contaminated wastewater. TiO₂has attracted much attention as photo catalyst for treatment of contaminated water. In this study, the photo catalytic performance of TiO₂has been enhanced by formation of p-n CoO₃O₄-TiO₂hetero-junction. The p-n CoO₃O₄-TiO₂hetero-junction was prepared by wet incipient impregnation method and characterized by various techniques. The photo catalytic activity of prepared composite was evaluated by photo degradation of methyl orange. The as prepared CoO₃O₄-TiO₂composite was found as effective catalyst than CoO₃O₄and TiO₂. The higher photo catalytic activity was attributed to p-n junction formed between CoO₃O₄and TiO₂. The degradation data was analyzed according to Eley-Rideal mechanism in terms of 1st and 2nd order kinetics.