TiO2/beads as a photocatalyst for the degradation of X3B azo dye.
The feasibility of photocatalytic degradation of X3B azo dye by TiO2/beads photocatalyst was studied. The effects of parameters such as the amount of TiO2/beads, airflow, as well as the concentrations of H2O2, Fe3+, Mg2+ and Na+ on the photocatalytic degradation of X3B azo dye were also studied. The results showed that 25 mg/dm3 X3B azo dye can be photocatalytically degraded completely by 30 min illumination with a 375W medium pressure mercury lamp. Adding a small amount of H2O2 or Fe3+, the efficiencies of photocatalytic degradation of X3B azo dye were increased rapidly. The mechanisms of the reaction and the role of the additives were also investigated. After 120 hours TiO2/beads showed no significant loss of the photocatalytic activity.
Chen
Shi-Fu
SF
Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China. chshifu@hbcnc.edu.cn
Cao
Geng-Yu
GY
D001391:Azo Compounds / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D005898:Glass; D010777:Photochemistry; D014025:Titanium / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
D001391:Azo Compounds; D004396:Coloring Agents; C009495:titanium dioxide; D014025:Titanium