Photocatalytic degradation of disperse blue 1 using UV/TiO_2/H_2O_2 process

摘要

The photocatalytic degradation of a dye derivative, C.I. disperse blue 1 (1), has been investigated under UV light irradiation in the presence of TiO_2 and H_2O_2 under a variety of conditions. The degradation was studied by monitoring the change in substrate concentration employing UV spectroscopic technique as a function of irradiation time. The degradation was studied under different conditions such as different types of TiO_2 reaction pH, catalyst and substrate concentration containing hydrogen peroxide (H_2O_2), besides molecular oxygen in the presence of TiO_2. The degradation of dye was also investigated under sunlight and the efficiency of degradation was compared with that of the artificial light source. The degradation rates were found to be strongly influenced by all the above parameters. The photocatalyst Degussa P25 was found to be more efficient for the degradation of the dye.