Photo Catalytic Degradation of Aqueous Solution of Salicylic Acid by UV/TiO2 Process

The photo catalytic properties of TiO2 nano particles (purched from Degussa) were investigated via acid salicylic as a model organic compound under UV light irradiation. The influence of operating parameters on acid salicylic degradation including the amount of TiO2 catalyst, pH value of solutions, acid salicylic concentration and the temperature was thoroughly examined. The photo degradation efficiency decreases with the increase in the amount of TiO2 photo catalyst. The photo catalyst capacity of TiO2 towards the salicylic acid solutions strongly depends on the pH of acid salicylic solutions, and the acid salicylic solutions catalyzed by TiO2 nano-particles have good photo degradation efficiency at a acidic pH values. The photo degradation ratios of acid salicylic solutions ascend with the increase of the acid salicylic concentration from 10 to 50 mg/L.