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The conditions for the preparation of PbO 2 modified Pt rotation disc electrode in solutions containing HClO 4 and Pb(II) were studied, and the morphology and composition of the obtained PbO 2 film were characterized by SEM and XRD techniques, respectively. The results show that the modification process of PbO 2 is dependent on the rotation velocity of the electrode and the concentrations of HClO 4 and Pb(II). And it was observed that the obtained PbO 2 film was rutile β PbO 2 structure. At a certain positive potential, HO· and HO 2· radicals can be generated on the surface of the modified PbO 2/Pt electrode and then oxidize phenols. According to the change of the responding anodic current, the determination of phenols was realizable and good results were obtained.
The conditions for the preparation of PbO 2 modified Pt rotation disc electrode in solutions containing HClO 4 and Pb (II) were studied, and the morphology and composition of the PbO 2 film were characterized by SEM and XRD techniques, respectively. The results show that the modification process of PbO 2 is dependent on the rotation velocity of the electrode and the concentrations of HClO 4 and Pb (II). And it was observed that the resultant PbO 2 film was rutile β PbO 2 structure. At a certain positive potential , HO · and HO 2 · radicals can be generated on the surface of the modified PbO 2 / Pt electrode and then oxidize phenols. According to the change of the responding anodic current, the determination of phenols was realizable and good results were obtained.