Electrocatalytic oxidation of indomethacin on a modified carbon nanotube electrode

Abstract

Electrocatalytic oxidation of indomethacin on a modified multiplewalled carbon nanotubes (MWCNTs) cathode in aqueous solution was studied in this paper. The experiments were carried out to explore the effects of initial concentration, electrolytic voltage, pH, concentration of electrolyte and electrolysis time on removal rate of indomethacin. The results of show that the removal rate reached 78% by using the Pt/MWCNTs electrode, when the concentration of indomethacin was 40 mg·L−1, the electrolytic voltage was 30V, the pH was 11, the concentration of Na2SO4 was 2000 mg·L−1 and the reaction time was 1h. Under such conditions, indomethacin degradation accords with the first order kinetics.