Photodegradation of indigo dye using TiO2 and TiO2/zeolite system

Collin Glen Joseph Anthony Joseph and Awang Bono and Teng, Lim Yee and Sharain Liew, Yen Ling (2013) Photodegradation of indigo dye using TiO2 and TiO2/zeolite system. Asian Journal of Chemistry, 25 (15). pp. 8402-8406. ISSN 0975-427X


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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.

Item Type: Article
Uncontrolled Keywords: TiO2/zeolite, Photodegradation, Indigo dye
Subjects: Q Science > QD Chemistry
Divisions: FACULTY > Faculty of Science and Natural Resources
Depositing User: ADMIN ADMIN
Date Deposited: 20 Dec 2016 03:35
Last Modified: 25 Oct 2017 02:31

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