Research articles
ScienceAsia (): 52-58 |doi:
10.2306/scienceasia1513-1874...052
Degradation of indigo carmine by rubber sheet impregnated with TiO2 particles
Chaval Sriwonga, Sumpun Wongnawaa,*, Orasa Patarapaiboolchaib
ABSTRACT: The photocatalytic degradation of indigo carmine was investigated by using rubber sheet impregnated with titanium dioxide particles. The characteristics of the impregnated sheet were studied using scanning electron microscopy and X-ray diffraction. The degradation was monitored by measuring the change of dye concentration as a function of irradiation time under UV light. The anatase impregnated sheet showed higher degradation efficiency than the P25 impregnated sheet. The effects of solution pH, dye initial concentration, and intensity of UV light on the photodegradation were investigated. Kinetics of photocatalytic degradation was of a first-order reaction. The used TiO2-impregnated sheets can be recovered and reused with no decline in the photodegradation efficiency.
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Department of Chemistry and Centre for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand |
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Polymer Science Program, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand |
* Corresponding author, E-mail: sumpun.w@psu.ac.th
Received 9 Aug 2009, Accepted 24 Feb 2010
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