University of Limerick Institutional Repository

Phenol degradation by powdered metal ion modified titanium dioxide photocatalysts

DSpace Repository

Show simple item record

dc.contributor.author Khraisheh, Majeda
dc.contributor.author Wu, Lijun
dc.contributor.author Al-Muhtaseb, Ala’a H.
dc.contributor.author Albadarin, Ahmad B.
dc.contributor.author Walker, Gavin M.
dc.date.accessioned 2019-05-23T11:05:42Z
dc.date.available 2019-05-23T11:05:42Z
dc.date.issued 2012
dc.identifier.uri http://hdl.handle.net/10344/7853
dc.description peer-reviewed en_US
dc.description.abstract Conventional water purification and disinfection generally involve potentially hazardous substances, some of which known to be carcinogenic in nature. Titanium dioxide photocatalytic processes provide an effective route to destroy hazardous organic contaminants. This present work explores the possibility of the removal of organic pollutants (phenol) by the application of TiO2 based photocatalysts. The production of series of metal ions doped or undoped TiO2 were carried out via a sol-gel method and a wet impregnation method. Undoped TiO2 and Cu doped TiO2 showed considerable phenol degradation. The efficiency of photocatalytic reaction largely depends on the photocatalysts and the methods of preparation the photocatalysts. The doping of Fe, Mn, and humic acid at 1.0 M% via sol-gel methods were detrimental for phenol degradation. The inhibitory effect of initial phenol concentration on initial phenol degradation rate reveals that photocatalytic decomposition of phenol follows pseudo zero order reaction kinetics. A concentration of > 1 g/L TiO2 and Cu doped TiO2 is required for the effective degradation of 50 mg/L of phenol at neutral pH. The rise in OH- at a higher pH values provides more hydroxyl radicals which are beneficial of phenol degradation. However, the competition among phenoxide ion. Cl- and OH- for the limited number of reactive sites on TiO2 will be a negative influence in the generation of hydroxyl radical. The dependence of phenol degradation rate on the light intensity was observed, which also implies that direct sunlight can be a substitute for the UV lamps and that photocatalytic treatment of organic pollutants using this technique shows some promise. (C) 2012 Elsevier B.V. All rights reserved. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Chemical Engineering Journal;213, pp. 125-134
dc.relation.uri https://doi.org/10.1016/j.cej.2012.09.108
dc.rights This is the author’s version of a work that was accepted for publication in Chemical Engineering Journal. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chemical Engineering Journal 2012, 213, pp. 125-134, https://doi.org/10.1016/j.cej.2012.09.108 en_US
dc.subject photocatalysts en_US
dc.subject modified titanium dioxide en_US
dc.subject photoreacto en_US
dc.subject sol–gel method en_US
dc.subject wet impregnation method en_US
dc.subject phenol en_US
dc.title Phenol degradation by powdered metal ion modified titanium dioxide photocatalysts en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.date.updated 2019-05-23T08:37:44Z
dc.description.version ACCEPTED
dc.identifier.doi 10.1016/j.cej.2012.09.108
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 1417257
dc.internal.copyrightchecked Yes
dc.identifier.journaltitle Chemical Engineering Journal
dc.description.status peer-reviewed


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search ULIR


Browse

My Account

Statistics