Study of catalytic effect on Oxidation of Methyl alcohol and Ethyl alcohol have been studied in acetonitrile medium in the presence of PTSA at 308K temperature. This is due to adsorption of gases or liquids on the surface of the solid and to an activation of the atoms composing the layer next to the surface of the solid. In the search for a catalyst for the oxidation of alcohol, those soluble compounds which form addition compounds with alcohol or with oxygen should be tested as possible homogeneous catalysts. The reaction shows first order dependence with respect to concentration of substrate and [H⁺]. The rate of oxidation increases with decrease in dielectric constant of solvent. All experiments were perform at 360nm optical density.