fulltext.study @t Gmail

Synergistic effects of TiO2 photocatalysis in combination with Fenton-like reactions on oxidation of organic compounds at circumneutral pH

Paper ID Volume ID Publish Year Pages File Format Full-Text
46423 46439 2012 6 PDF Available
Title
Synergistic effects of TiO2 photocatalysis in combination with Fenton-like reactions on oxidation of organic compounds at circumneutral pH
Abstract

The integration of two different AOPs often offers synergistic reaction routes for the production of OH. In this study, synergistic production of OH was observed in the combined system of TiO2 photocatalysis and the Fenton-like reaction, causing a drastic enhancement in the oxidation of organic compounds at circumneutral pH values. The photolytic experiments using organic substrates (i.e., phenol, benzoic acid, and methanol) and valence band hole and OH scavengers (i.e., formate and tert-butyl alcohol) show that the synergistic effects result from dual roles of iron as an electron acceptor to facilitate charge separation in TiO2 photocatalyst and as a Fenton reagent to catalyze conversion of H2O2 into OH. A noteworthy observation is that the adsorption of iron onto the photoexcited TiO2 surface possibly modifies electron transfer properties of iron toward H2O2 at neutral pH to convert the resultant reactive oxidant from Fe(IV) into a stronger form, likely OH.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The combination of UV/TiO2 and Fe(III)/H2O2 leads to synergistic degradation of contaminants. ► The synergistic effects result from dual roles of iron. Iron facilitates charge separation in TiO2 photocatalyst. ► Iron on the photoexcited TiO2 surface does not produce Fe(IV) via the Fenton reaction.

Keywords
Fenton reaction; Titanium dioxide; Photocatalysis; Neutral pH; Hydroxyl radical
First Page Preview
Synergistic effects of TiO2 photocatalysis in combination with Fenton-like reactions on oxidation of organic compounds at circumneutral pH
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 115–116, 5 April 2012, Pages 219–224
Authors
, , , ,
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