Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 4, 2016
Previous Article Next Article

Cationic and anionic azo-dye removal from water by sulfonated graphene oxide nanosheets in Nafion membranes

Author affiliations

Abstract

Graphene oxide flakes functionalized with 3-amino-1-propanesulfonic acid (denoted as GOSULF) as a powder or incorporated into an ionomer membrane such as Nafion (DuPont) were studied for water purification applications. The adsorption and the photocatalytic activity of the GOSULF powder itself or confined as a nano-additive in the membrane (Nafion–GOSULF) were investigated by measuring the degradation of a cationic dye, methylene blue (MB), in the dark and under UV/Visible light illumination. The results were compared with the ability of these systems to degrade an anionic dye, methyl orange (MO), in order to evaluate the role of the polymer–dye interaction. The degradation of the azo dyes depends on the mutual interaction between GOSULF flakes, the polymeric matrix and the dye: Nafion–GOSULF strongly reduces MB both under dark and illumination conditions in the same way as the GOSULF powder, while, for MO degradation, the composite membrane is more efficient than GOSULF alone. Finally, the possibility of reusing the same photocatalytic material several times, which is the main advantage of embedding active nanomaterials in a polymer matrix, is demonstrated by the effective regeneration of the nanocomposite membranes.

Graphical abstract: Cationic and anionic azo-dye removal from water by sulfonated graphene oxide nanosheets in Nafion membranes

Back to tab navigation

Article information


Submitted
09 Nov 2015
Accepted
15 Feb 2016
First published
16 Feb 2016

New J. Chem., 2016,40, 3654-3663
Article type
Paper
Author version available

Cationic and anionic azo-dye removal from water by sulfonated graphene oxide nanosheets in Nafion membranes

S. Scalese, I. Nicotera, D. D'Angelo, S. Filice, S. Libertino, C. Simari, K. Dimos and V. Privitera, New J. Chem., 2016, 40, 3654
DOI: 10.1039/C5NJ03096J

Social activity

Search articles by author

Spotlight

Advertisements