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AuthorAl-Qaradawi, Siham
AuthorSalman, Salman R.
Available date2017-02-19T07:36:46Z
Publication Date2002-05-31
Publication NameJournal of Photochemistry and Photobiology A: Chemistry
Identifierhttp://dx.doi.org/10.1016/S1010-6030(02)00086-2
CitationSiham Al-Qaradawi, Salman R. Salman, Photocatalytic degradation of methyl orange as a model compound, Journal of Photochemistry and Photobiology A: Chemistry, Volume 148, Issues 1–3, 31 May 2002, Pages 161-168
ISSN10106030
URIhttp://www.sciencedirect.com/science/article/pii/S1010603002000862
URIhttp://hdl.handle.net/10576/5271
AbstractTitanium dioxide (TiO2) was used as a photocatalyst for the detoxification of water containing methyl orange (MO), which was used as a model compound. Solar radiation was used as an irradiation source. It was found that there was no degradation for the MO in the dark and in the presence of TiO2. Also no degradation was observed for MO when the solution placed under solar radiation but without TiO2. Several experiments were used to optimize the experimental parameters. In the first set of experiments variable amounts of TiO2 were used with a fixed concentration of MO. It was found that 0.4% of TiO2 gave the highest degradation rate constant, 0.619h−1. In the second set of experiments TiO2 concentration was fixed at 0.4% and the MO concentration was varied, the highest rate constants was obtained when the concentration of MO was 4×10−5M and it was found to be 0.639h−1. The degradation became negligible in the presence of high concentrations of MO. The highest degradation rate was obtained at pH=3 with a rate constant κ=2.6683h−1, followed by that at pH=9 where the calculated κ=0.7585h−1.
Languageen
PublisherElsevier
SubjectTitanium dioxide
UV–visible spectroscopy
Methyl orange
Solar radiation
Degradation rate constant
Photocatalysis
First order kinetics
Effect of concentration
Effect of solar energy
Effect of changing pH
TitlePhotocatalytic degradation of methyl orange as a model compound
TypeArticle
Pagination161-168
Issue Number1
Volume Number148
dc.accessType Abstract Only


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