Near-UV-VIS light induced acid orange 7 bleaching in the presence of SiW12O404- catalyst

Idil Arslan-Alaton; John L. Ferry

doi:10.1016/S1010-6030(02)00185-5

Near-UV-VIS light induced acid orange 7 bleaching in the presence of SiW₁₂O₄₀^4- catalyst

Idil Arslan-Alaton^*, John L. Ferry

^*Corresponding author for this work

Department of Environmental Engineering

University of South Carolina

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

The azo dye acid orange 7 (AO7) was decolourized by SiW₁₂O₄₀^5-, the one-electron photo-chemically reduced form of SiW₁₂O₄₀^4- catalyst, in aqueous solutions of aerated and de-aerated sacrificial electron donor isopropanol. Under our experimental conditions, the AO7 decay rate depended upon the competition between the azo dye and molecular oxygen for SiW₁₂O₄₀^5-. The colour removal rate constant was found as 5.2 × 10⁴ M^-1 s^-1 by applying AO7-O₂ competition kinetics based on a simple kinetic reaction scheme.

Original language	English
Pages (from-to)	175-181
Number of pages	7
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	152
Issue number	1-3
DOIs	https://doi.org/10.1016/S1010-6030(02)00185-5
Publication status	Published - 20 Sept 2002

Keywords

Acid orange 7
Competition kinetics
Heteropolyblue
Photochemical treatment
Polyoxometalates
SiWO catalyst
Textile azo dyes

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10.1016/S1010-6030(02)00185-5

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title = "Near-UV-VIS light induced acid orange 7 bleaching in the presence of SiW12O404- catalyst",

abstract = "The azo dye acid orange 7 (AO7) was decolourized by SiW12O405-, the one-electron photo-chemically reduced form of SiW12O404- catalyst, in aqueous solutions of aerated and de-aerated sacrificial electron donor isopropanol. Under our experimental conditions, the AO7 decay rate depended upon the competition between the azo dye and molecular oxygen for SiW12O405-. The colour removal rate constant was found as 5.2 × 104 M-1 s-1 by applying AO7-O2 competition kinetics based on a simple kinetic reaction scheme.",

keywords = "Acid orange 7, Competition kinetics, Heteropolyblue, Photochemical treatment, Polyoxometalates, SiWO catalyst, Textile azo dyes",

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T1 - Near-UV-VIS light induced acid orange 7 bleaching in the presence of SiW12O404- catalyst

AU - Arslan-Alaton, Idil

AU - Ferry, John L.

PY - 2002/9/20

Y1 - 2002/9/20

N2 - The azo dye acid orange 7 (AO7) was decolourized by SiW12O405-, the one-electron photo-chemically reduced form of SiW12O404- catalyst, in aqueous solutions of aerated and de-aerated sacrificial electron donor isopropanol. Under our experimental conditions, the AO7 decay rate depended upon the competition between the azo dye and molecular oxygen for SiW12O405-. The colour removal rate constant was found as 5.2 × 104 M-1 s-1 by applying AO7-O2 competition kinetics based on a simple kinetic reaction scheme.

AB - The azo dye acid orange 7 (AO7) was decolourized by SiW12O405-, the one-electron photo-chemically reduced form of SiW12O404- catalyst, in aqueous solutions of aerated and de-aerated sacrificial electron donor isopropanol. Under our experimental conditions, the AO7 decay rate depended upon the competition between the azo dye and molecular oxygen for SiW12O405-. The colour removal rate constant was found as 5.2 × 104 M-1 s-1 by applying AO7-O2 competition kinetics based on a simple kinetic reaction scheme.

KW - Acid orange 7

KW - Competition kinetics

KW - Heteropolyblue

KW - Photochemical treatment

KW - Polyoxometalates

KW - SiWO catalyst

KW - Textile azo dyes

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SN - 1010-6030

VL - 152

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EP - 181

JO - Journal of Photochemistry and Photobiology A: Chemistry

JF - Journal of Photochemistry and Photobiology A: Chemistry

IS - 1-3

ER -

Near-UV-VIS light induced acid orange 7 bleaching in the presence of SiW₁₂O₄₀^4- catalyst

Abstract

Keywords

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