Further Consideration of Effect of Fluoro-Carbon Chain Length on Catalytic Activity and Properties of Lead Dioxide-Based Surfactant Composites

Abstract

Rate constant (k) for the lead(II) oxidation decreases from (4.06 ± 0.10) × 10−4 to (2.80 ± 0.10) × 10−4 ms−1 when 3 × 10−4 M of dopant C6F13SO3K is added to the deposition solution. The adsorption of C6F13SO3K on PbO2 is specific, which is confirmed by the shift of pH0 of the oxide to higher value. There are no visible differences when modifying lead dioxide with perfluorohexanesulfonate, the morphology of the composite is similar to the naked sample; as well as there are only slight deviations in the texture of the composites involved. It should be noted that using a long chain compound with perfluorinated hydrocarbon radical in order to achieve higher oxidation rates of organic compounds is not recommended since a perfluorinated hydrocarbon skeleton (longer than 4 carbon atoms) can block active centers taking part in water and 4-chlorophenol oxidation.