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Effect of glucose on photocatalytic decolorization of dyes by TiO 2
Author(s) -
Kunitou Katsushi,
Maeda Shingo,
Hongyou Setsuaki,
Mishima Kenji
Publication year - 2002
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450800205
Subject(s) - sulfanilic acid , photocatalysis , chemistry , aqueous solution , kinetics , reaction rate constant , photochemistry , nitrogen , inorganic chemistry , nuclear chemistry , catalysis , organic chemistry , physics , quantum mechanics
The effect of saccharides, such as glucose, on the photocatalytic decolorization of various dyes has been investigated using TiO 2 as a photocatalyst in an aqueous solution saturated with nitrogen. An azo dye, such as Orangell, used as a typical dye, was reduced by cleavage of the azo linkage, as evidenced by the production of sulfanilic acid. All of the dyes tested were decomposed with first‐order kinetics. The rate constants of decolorization in the aqueous solution saturated with nitrogen increased with the addition of a saccharide such as glucose. Furthermore, the effect of the reductive saccharides on the photocatalytic decolorization of dyes was quantitatively correlated with their dispersion force. The reaction rate of the photocatalytic decolorization of dyes in the aqueous solution saturated with nitrogen, including glucose, is 7 times that in the solution saturated with oxygen.