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Photodegradation of the textile dye Reactive Black 5 in the presence of semiconducting oxides
Author(s) -
Poulios I,
Tsachpinis I
Publication year - 1999
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199904)74:4<349::aid-jctb5>3.0.co;2-7
Subject(s) - photodegradation , dyeing , photocatalysis , aqueous solution , mineralization (soil science) , textile , chemistry , photochemistry , degradation (telecommunications) , ion , chemical engineering , materials science , catalysis , organic chemistry , composite material , telecommunications , computer science , nitrogen , engineering
The photocatalytic degradation of Reactive Black 5, a textile azodye, has been investigated in aqueous heterogeneous solutionscontaining semiconductor oxides as photocatalysts. The disappearanceof the organic molecule follows approximately a pseudo‐firstkinetic order according to the Langmuir–Hinshelwood model. CO 2 , NO 3 − , and SO 4 2− ions have been identified as mineralizationproducts. Various commercial photocatalysts were compared withrespect to their decolorization efficiency, as well as the productionof CO 2 . The effect of pH and H 2 O 2 on the reaction rate was ascertained. © 1999 Society of Chemical Industry