α-PbO
2 was introduced into the intermediate layer of an electrode to prevent the separation of the electrodeposited layer and maintain oxidizing power. The resulting Ti/α-PbO
2/β-PbO
2 composite electrode was applied to the electrochemical decolorization of methylene blue (MB) and the
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α-PbO
2 was introduced into the intermediate layer of an electrode to prevent the separation of the electrodeposited layer and maintain oxidizing power. The resulting Ti/α-PbO
2/β-PbO
2 composite electrode was applied to the electrochemical decolorization of methylene blue (MB) and the operating conditions for MB decolorization with the Ti/α-PbO
2/β-PbO
2 electrode were optimized. The morphology, structure, composition, and electrochemical performance of Ti/α-PbO
2 and Ti/α-PbO
2/β-PbO
2 anode were evaluated using scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The optimum operating parameters for the electrochemical decolorization of MB at Ti/α-PbO
2/β-PbO
2 composites were as follows: Na
2SO
4 electrolyte 0.05 g L
−1, initial concentration of MB 9 mg L
−1, cell voltage 20 V, current density 0.05–0.10 A cm
−2, and pH 6.0. MB dye could be completely decolorized with Ti/α-PbO
2/β-PbO
2 for the treatment time of less than one hour, and the dye decolorization efficiency with Ti/α-PbO
2/β-PbO
2 was about 5 times better, compared with those obtained with Ti/α-PbO
2.
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