Bulk electrolysis
In order to rationalize the degradation mechanism, the bulk electrolysis was performed in the presence of 0.5 M KNO3 and 0.5 M KCl within the potential range between 0 and +1.5 V at pH 2. The relative bleaching/decolorization performance was evaluated based on the assumption that MB molecules decayed exponentially following the first order reaction presented below: