Journal
CARBON
Volume 158, Issue -, Pages 193-201Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2019.11.091
Keywords
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Funding
- National Science Centre [2015/18/E/ST5/00188, 2017/27/N/ST5/00173]
- European Union through the European Social Fund under the Operational Program Knowledge Education Development [POWR.03.02.00e00-I026/16]
- European Commission through the Graphene Flagship Core 2 project [GA-785219]
- ERC project SUPRA2DMAT [GA-833707]
- Agence Nationale de la Recherche through the Labex project CSC within the Investissement d'Avenir program [ANR-10-LABX-0026 CSC, ANR-10-120 IDEX-0002-02]
- International Center for Frontier Research in Chemistry (icFRC)
- Embassy of France in Poland
- Foundation for Polish Science (FNP)
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In this study, we have developed a novel mesoporous SiO2 - graphene oxide hybrid material (SiO(2)NH(2)GO) as highly efficient adsorbent for removal of cationic organic dyes from water. The fabrication of such a three-dimensional (3D) SiO2NH2-GO composite has been achieved via the condensation reaction between the amine units exposed on 3-aminopropyl-functionalized silica nanoparticles and the epoxy groups on surface of GO. As a proof-of-concept, SiO2NH2-GO was used for the removal of archetypical dyes from water and revealed outstanding maximum adsorption capacity towards methylene blue (MB), rhodamine B (RhB) and methyl violet (MV) at pH 10 reaching 300, 358 and 178 mg g(-1) for MB, RhB and MV, respectively, thus outperforming the neat components of composite, i.e. GO and SiO2. Moreover, the adsorption process revealed that similar to 99.7% of MB, RhB and MV have been removed in only 3 min thereby highlighting the superior nature of SiO2NH2-GO composite with respect to most of graphene oxide-based adsorbents of organic dyes. Finally, the composite was used in solid phase extraction (SPE) as column packing material, for continuous water purification, thus highlighting the great potential of SiO2NH2-GO for the large-scale removal of cationic dyes from aqueous solutions. (C) 2019 Elsevier Ltd. All rights reserved.
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