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Open AccessArticle

Photocatalytic, Morphological and Structural Properties of the TiO2-SiO2-Ag Porous Structures Based System

1
Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany János 11, RO-400028 Cluj-Napoca, Romania
2
Faculty of Physics, Babeș-Bolyai University, M. Kogălniceanu 1, RO-400084 Cluj-Napoca, Romania
3
Faculty of Science and Informatics, Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary
4
Institute for Interdisciplinary Research on Bio-Nano-Sciences, Babeș-Bolyai University, M. Kogălniceanu 1, RO-400084 Cluj-Napoca, Romania
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Klara Hernadi
Materials 2015, 8(3), 1059-1073; https://doi.org/10.3390/ma8031059
Received: 18 December 2014 / Revised: 19 February 2015 / Accepted: 28 February 2015 / Published: 12 March 2015
(This article belongs to the Special Issue Photocatalytic Materials)
TiO2-SiO2-based nanocomposites with highly porous structures are gaining ever increasing attention due to their specific properties and large variability of synthesis pathways together with wide information on the impact of the synthesis on the activity of the catalyst. This thereby offers an alternative approach to traditional/commercially available photocatalysts. In our work TiO2-SiO2 based aerogels were obtained and modified with various amount of Ag nanoparticles, using different synthesis pathways. In the first instance their photocatalytic activity was examined in detail, by observing major differences toward salicylic acid and correlating them with their morphological and structural properties (investigating their mesoporous character, band-gap values, crystallinity grade etc.). Applying different techniques such as diffuse reflectance spectroscopy (DRS), X-ray diffraction measurements (XRD), transmission electron microscopy (TEM), Raman- and X-ray photoelectron spectroscopy (XPS) the nanoparticles and their composite morphological and structural details were successfully evaluated. Major differences were observed in the activity towards salicylic acid. View Full-Text
Keywords: titanium-dioxide; aerogels; silver nanoparticles; photocatalysis titanium-dioxide; aerogels; silver nanoparticles; photocatalysis
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Kovács, G.; Pap, Z.; Coteț, C.; Coșoveanu, V.; Baia, L.; Danciu, V. Photocatalytic, Morphological and Structural Properties of the TiO2-SiO2-Ag Porous Structures Based System. Materials 2015, 8, 1059-1073.

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