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Journal of Materials Science
Erschienen in: Journal of Materials Science 6/2016

01.03.2016 | Original Paper

Photocatalytic activity and colloidal stability of various combinations of TiO2/SiO2 nanocomposites

verfasst von: A. Khadem-Hosseini, S. M. Mirabedini, S. Pazokifard

Erschienen in: Journal of Materials Science | Ausgabe 6/2016

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Abstract

In this study, various combinations of TiO2 and SiO2 nanoparticles were prepared using different methods. TiO2 and SiO2 nanoparticles were separately modified by tetraethyl orthosilicate and titanium tetraisopropoxide, respectively. SiO2/TiO2 nanocomposite was synthesized through a two-step sol–gel route. A physical blend of TiO2/SiO2 nanocomposite was also prepared. The nanoparticles were characterized using FTIR spectroscopy, thermal gravimetric analysis, and X-ray diffraction technique. Specific surface area of the nanoparticles was determined using Brunauer, Emmett, and Teller method. The colloidal stability of various nanoparticles was investigated visually and instrumentally in an aqueous media. Photocatalytic activity of nanoparticles was studied through photo-degradation of rhodamine-B dyestuff, in aqueous solutions under UVA irradiation. The results showed improvement of dispersion stability along with the decrease in photocatalytic activity for silica-grafted TiO2-nanoparticles in aqueous solutions compared with the untreated particles. However, titania-grafted SiO2 nanoparticles showed reduced colloidal stability and better photocatalytic activity than their untreated counterparts. The synthesized SiO2/TiO2 nanocomposites revealed the enhanced both photocatalytic activity and colloidal stability among the others.
Vorheriger Artikel Facile preparation of superhydrophobic and superoleophilic porous polymer membranes for oil/water separation from a polyarylester polydimethylsiloxane block copolymer
Nächster Artikel A new shape memory epoxy resin with excellent comprehensive properties

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Metadaten
Titel
Photocatalytic activity and colloidal stability of various combinations of TiO2/SiO2 nanocomposites
verfasst von
A. Khadem-Hosseini
S. M. Mirabedini
S. Pazokifard
Publikationsdatum
01.03.2016
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 6/2016
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-015-9633-5

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