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Degradation of X-3B dye by immobilized TiO2 photocatalysis coupling anodic oxidation on BDD electrode

Paper ID Volume ID Publish Year Pages File Format Full-Text
27306 44015 2009 7 PDF Available
Title
Degradation of X-3B dye by immobilized TiO2 photocatalysis coupling anodic oxidation on BDD electrode
Abstract

Photocatalysis on nano-sized TiO2 and electrocatalysis on boron-doped diamond (BDD) electrode, all belonged to advanced oxidation processes (AOPs) in the field of wastewater treatment, were united into one batch reactor in our experiments. Reactive brilliant red X-3B dye was used as model compound to study the combinatory effect between photocatalysis and electrocatalysis. The titania sol, deposited on glass substrate, prepared by chemical sol–gel process, was found to have anatase crystalline structure, uniform nanoparticle distribution and spherical particle morphology. The oxidants produced on BDD anodes such as hydrogen peroxide, ozone and peroxodisulfate could raise the quantum efficiency of photocatalytic processes. Initially, the performances of the separate processes in the elimination of X-3B were compared. An interesting synergistic effect was observed in the combined reactor. In order to find out the optimum conditions in color and total organic carbon (TOC) removal, the effects of the operating variables were investigated. The experimental results revealed the suitability of the combination of these two options for accelerating the removal of dye pollutants from the solution. Additionally, the assumptive reaction mechanism and the reaction kinetics were also proposed.

Keywords
Reactive brilliant red X-3B dye; TiO2 photocatalysis; Boron-doped diamond (BDD); Advanced oxidation processes (AOPs)
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 207, Issue 1, 5 September 2009, Pages 66–72
Authors
, , , , , ,
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