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Issue 36, 2011
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Oxidation of SO2 to SO3 catalyzed by graphene oxide foams

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Abstract

Porous graphene oxide foams were prepared by unidirectional freeze-drying technology and used to investigate the reaction between graphene oxide (GO) and SO2. The structure and composition changes of the graphene oxide were monitored by X-ray photoelectron spectrometry (XPS), Raman, X-ray diffraction (XRD), Thermogravimetric analysis (TGA), and ultraviolet-visible spectroscopy (UV-vis), and the product of the reaction was analyzed by an EDTA titration. The results show that SO2 was oxidized to SO3 and the GO was reduced. GO not only acts as the oxidant in the reaction, but also as the catalyst to catalyze the reaction of SO2 and O2 to form SO3. This catalytic action is more active in the aqueous GO suspensions than in the foams. The GO foams can adsorb SO2 and convert it to SO3 which then changes to SO42 on contact with water. This offers a new effective method of converting noisome SO2 gas to SO3 at room temperature.

Graphical abstract: Oxidation of SO2 to SO3 catalyzed by graphene oxide foams

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Publication details

The article was received on 09 May 2011, accepted on 08 Jul 2011 and first published on 11 Aug 2011


Article type: Paper
DOI: 10.1039/C1JM12031J
J. Mater. Chem., 2011,21, 13934-13941

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    Oxidation of SO2 to SO3 catalyzed by graphene oxide foams

    Y. Long, C. Zhang, X. Wang, J. Gao, W. Wang and Y. Liu, J. Mater. Chem., 2011, 21, 13934
    DOI: 10.1039/C1JM12031J

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