Photodegradation of indigo dye using TiO2 and TiO2/zeolite system

• Main Authors: Collin Glen Joseph Anthony Joseph, Awang Bono, Teng, Lim Yee, Sharain Liew, Yen Ling
• Format: Article
• Language: English; English
• Published: Asian Publication Corporation 2013
• Subjects: QD Chemistry
• Online Access: https://eprints.ums.edu.my/id/eprint/15271/1/Photodegradation_of_indigo_dye_using_TiO2_and_TiO2.pdf; https://eprints.ums.edu.my/id/eprint/15271/7/Photodegradation%20of%20indigo%20dye%20using%20TiO2%20and%20TiO2.pdf; https://eprints.ums.edu.my/id/eprint/15271/; http://dx.doi.org/10.14233/ajchem.2013.14768
• Institution: Universiti Malaysia Sabah

Photodegradation of indigo dye in aqueous solution using anatase TiO2 and TiO2/zeolite composite photocatalyst were studied. The composite photocatalysts were prepared by using sol-gel method. Calcination sol-gel was performed in a muffle furnace at 450 ºC for 4 h. The photocatalysts were characterized using SEM and XRD. 0.4 g of photocatalysts were used to degrade 500 mL of indigo dye giving a constant catalyst loading of 0.8 g/L in varying indigo dye concentration of between 10-20 mg/L. The results showed that the photocatalytic behaviour of TiO2/zeolite composite sample was better as the degree of degradation for TiO2/zeolite was higher compared to the neat TiO2 sample. The percentage degradation achieved by using TiO2/zeolite in 10 and 20 mg/L were 58.6 and 75.0 % respectively. In addition, the degradation process followed the first-order reaction kinetics where the rate constant, k, for the degradation of indigo dye solution was in the range of 0.1207-0.2669 h-1 (not presented). This work demonstrates that the sol-gel method was successful in preparing an effective TiO2/zeolite composite photocatalyst.