Abstract: The photocatalytic degradation of 4-Chlorophenol (4CP) using carbon C coated TiO2 (C-TiO2) and pristine TiO2 under solar irradiation has been studied. The experiments were carried out in a suspension mode under custom made glass cell reactor with continuous aeration supply. Both photocatalysts worked efficiency at pH 6. It was found that 0.6 and 0.3 g were the optimum loading for C-TiO2 and pristine TiO2 respectively in the degradation of 20 mg L-1 4CP under solar irradiation. The optimum C-TiO2 was found six times faster than pristine TiO2 based on pseudo first order rate constant of 4CP photodegradation. No adsorption was observed in the photocatalysts. The intermediates observed during this photocatalytic degradation process were maleic acid, hydroquinone (HQ), benzoquinone (BQ), 4-chlorochetol (4CC) and resorcinol.