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Photocatalytic efficiency of ZnO plates in degradation of azo dye solutions

Paper ID Volume ID Publish Year Pages File Format Full-Text
28649 44084 2008 6 PDF Available
Title
Photocatalytic efficiency of ZnO plates in degradation of azo dye solutions
Abstract

Tape casting method was used to prepare ZnO plates for photocatalytic degradation of Reactive Orange 16 (RO 16) and Reactive Red 180 (RR 180) textile dyes in aqueous solutions. The plates were sintered at 700 °C and 1050 °C and characterized by using TG-DTA, BET and SEM. The sintering process at 700 °C yields relatively high surface area ZnO plates comparing with the plates sintered at 1050 °C. The photocatalytic activity was enhanced when the high surface area plates were used in photocatalytic degradation processes. Up to 95.7% and 88.6% color removal was obtained in 90 min for the RR 180 and RO 16 aqueous solutions, respectively, when the plates were sintered at 700 °C. Total organic carbon (TOC) removal was 43% at 180 min for RR 180 solution. Photocorrosion tendency was observed to some extend during photocatalysis when multiple tests were performed on the same plate. This corrosive effect was recovered by the memory effect when the plates were subjected to dark interval overnight.

Keywords
Heterogeneous photocatalysis; Tape casting; Semiconductor photocatalyst; ZnO; Azo dyes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 198, Issue 1, 5 July 2008, Pages 1–6
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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