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Nanomaterials 2019, 9(3), 358; https://doi.org/10.3390/nano9030358

Facile Synthesis of SnO2 Aerogel/Reduced Graphene Oxide Nanocomposites via in Situ Annealing for the Photocatalytic Degradation of Methyl Orange

1
Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Korea
2
Laboratory of Electromechanical Systems (LASEM), National School of Engineers of Sfax (ENIS), University of Sfax, PO Box 1173, Route Soukra km 3.5, 3038 Sfax, Tunisia
3
Laboratory of Molecular and Cellular Screening Processes, Centre of Biotechnology of Sfax (CBS), University of Sfax, PO Box 1177, Road Sidi Mansour km 6, 3018 Sfax, Tunisia
*
Author to whom correspondence should be addressed.
Received: 31 January 2019 / Revised: 25 February 2019 / Accepted: 27 February 2019 / Published: 4 March 2019
(This article belongs to the Special Issue Electronic and Thermal Properties of Graphene)
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Abstract

SnO2 aerogel/reduced graphene oxide (rGO) nanocomposites were synthesized using the sol–gel method. A homogeneous dispersion of graphene oxide (GO) flakes in a tin precursor solution was captured in a three-dimensional network SnO2 aerogel matrix and successively underwent supercritical alcohol drying followed by the in situ thermal reduction of GO, resulting in SnO2 aerogel/rGO nanocomposites. The chemical interaction between aerogel matrix and GO functional groups was confirmed by a peak shift in the Fourier transform infrared spectra and a change in the optical bandgap of the diffuse reflectance spectra. The role of rGO in 3D aerogel structure was studied in terms of photocatalytic activity with detailed mechanism of the enhancement such as electron transfer between the GO and SnO2. In addition, the photocatalytic activity of these nanocomposites in the methyl orange degradation varied depending on the amount of rGO loading in the SnO2 aerogel matrix; an appropriate amount of rGO was required for the highest enhancement in the photocatalytic activity of the SnO2 aerogel. The proposed nanocomposites could be a useful solution against water pollutants. View Full-Text
Keywords: SnO2 aerogel; sol–gel method; graphene oxide; nanocomposite; photocatalysis SnO2 aerogel; sol–gel method; graphene oxide; nanocomposite; photocatalysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Kim, T.; Parale, V.G.; Jung, H.-N.-R.; Kim, Y.; Driss, Z.; Driss, D.; Bouabidi, A.; Euchy, S.; Park, H.-H. Facile Synthesis of SnO2 Aerogel/Reduced Graphene Oxide Nanocomposites via in Situ Annealing for the Photocatalytic Degradation of Methyl Orange. Nanomaterials 2019, 9, 358.

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