Abstract
In this work, the electrodeposition of lead dioxide on a Pb electrode was realized by a potentiostatic method in 0.5 mol/L sulfuric acid solution at 1.3 V (ECS) during 30 min. The result of XRD showed that the crystal structure of PbO2 in acid solution is pure β-PbO2. The electrodegradation of tris (4-(dimethylamino) phenyl) methylium chloride (methyl violet 10B) dye in an aqueous solution of 0.1 mol/L sodium sulfate has been studied by potentiostatic method using β-PbO2 as anode. The methyl violet 10B was successfully oxidized by hydroxyl radicals electrogenerated from oxidation of water on the Pb/β-PbO2 electrode surface. The anodic oxidation of methyl violet 10B followed the pseudo-first order kinetics. The time and applied potential had significant effect on the electrochemical degradation of methyl violet 10B at the Pb/β-PbO2 electrode with a degradation rate of 10.5 g/(m2 day).
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ACKNOWLEDGMENTS
The author would like to thank Dr B. Bellal of laboratory of Storage and Valorization of Renewable Energies, Faculty of the Chemistry, U.S.T.H.B for his assistance in the UV–Visible spectroscopic analysis of the solutions before and after the degradation of the dye.
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Smaili, F., Benchettara, A. Electrocatalytic Efficiency of PbO2 in Water Decontamination. Russ J Electrochem 55, 925–932 (2019). https://doi.org/10.1134/S1023193519100082
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DOI: https://doi.org/10.1134/S1023193519100082