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Composite nanofibers for highly efficient photocatalytic degradation of organic dyes from contaminated water
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Funktionella material, FNM. Mechanical Design and Production Engineering Department, Cairo University, Giza, Egypt.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Funktionella material, FNM.ORCID-id: 0000-0001-5678-5298
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2016 (engelsk)Inngår i: Environmental Research, ISSN 0013-9351, E-ISSN 1096-0953, Vol. 145, s. 18-25Artikkel i tidsskrift (Fagfellevurdert) Published
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Abstract [en]

In this study highly efficient photocatalyst based on composite nanofibers containing polyacrylonitrile (PAN), carbon nanotubes (CNT), and surface functionalized TiO2 nanoparticles was developed. The composite nanofibers were fabricated using electrospinning technique followed by chemical crosslinking. The surface modification and morphology changes of the fabricated composite nanofibers were examined through SEM, TEM, and FTIR analysis. The photocatalytic performance of the composite nanofibers for the degradation of model molecules, methylene blue and indigo carmine, under UV irradiation in aqueous solutions was investigated. The results demonstrated that high photodegradation efficiency was obtained in a short time and at low power intensity compared to other reported studies. The effective factors on the degradation of the dyes, such as the amount of catalyst, solution pH and irradiation time were investigated. The experimental kinetic data were fitted using pseudo-first order model. The effect of the composite nanofibers as individual components on the degradation efficiency of MB and IC was evaluated in order to understand the overall photodegradation mechanism. The results obtained showed that all the components possess significant effect on the photodegradation activity of the composite nanofibers. The stability studies demonstrated that the photodegradation efficiency can remain constant at the level of 99% after five consecutive cycles.

sted, utgiver, år, opplag, sider
Elsevier, 2016. Vol. 145, s. 18-25
Emneord [en]
Carbon nanotubes (CNTs), Composite nanofibers, Electrospinning, Organic contaminants, Photocatalytic
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Identifikatorer
URN: urn:nbn:se:kth:diva-181428DOI: 10.1016/j.envres.2015.09.024ISI: 000368218700003Scopus ID: 2-s2.0-84947786246OAI: oai:DiVA.org:kth-181428DiVA, id: diva2:900593
Merknad

QC 20160204. QC 20160220

Tilgjengelig fra: 2016-02-04 Laget: 2016-02-02 Sist oppdatert: 2017-11-30bibliografisk kontrollert

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