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Adsorption and Photocatalytic Degradation of Para-hydroxybenzoic Acid Catalyzed by Nano-TiO2

Fangfang Wang

Abstract

The adsorption behavior and photocatalytic degradation of para-hydroxybenzoic acid on nano-TiO2 in water have been studied under UV irradiation as functions of pH.The results showed that the adsorption of hydroxybenzoic acid on TiO2 particles was either pH-dependent and/or pzc(point of zero charge of TiO2)-dependent due to electrostatic interaction.The adsorption between hydroxybenzoic acid and TiO2 played a very important role in the photocatalytic process.The higher the adsorption,the higher the degradation in similar conditions.

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Key concepts: Adsorption, Point of zero charge, Photocatalysis, Hydroxybenzoic acid, Catalysis, Chemistry, Degradation (telecommunications), Inorganic chemistry