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UVA and solar light assisted photoelectrocatalytic degradation of AO7 dye in water using spray deposited TiO2 thin films

Paper ID Volume ID Publish Year Pages File Format Full-Text
47862 46483 2009 7 PDF Available
Title
UVA and solar light assisted photoelectrocatalytic degradation of AO7 dye in water using spray deposited TiO2 thin films
Abstract

The degradation of the azo-dye acid orange 7 (AO7) was performed in a photoelectrochemical reactor module consisting of up to nine photoelectrochemical cells equipped with TiO2 electrodes deposited on transparent conducting substrates. These electrodes were illuminated from the backside by UVA broadband light or sunlight. Electrical bias was applied for efficient separation of photogenerated charge carriers.Solutions of AO7 (≤1 mM) in dilute supporting electrolyte (10 mM HClO4 or Na2SO4) were recirculated through the reactor(s) at a fixed flow rate of 12.2 l h−1 (mean flow velocity of 4.24 cm s−1). AO7 disappeared following first-order kinetics. During solar irradiation, using a total electrode area of 576 cm2, and 1.5 V bias with respect to a stainless steel counter electrode, a decay rate constant normalized to unit volume, k′, of 0.23 cm3 s−1 was found under a photocurrent of 0.1 A. Concentrations could be decreased to the micromolar range within 1 h.

Keywords
TiO2; Thin film; Spray pyrolysis; Acid Orange 7; Photoelectrocatalysis
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UVA and solar light assisted photoelectrocatalytic degradation of AO7 dye in water using spray deposited TiO2 thin films
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 89, Issues 1–2, 3 July 2009, Pages 288–294
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us