Graphene oxide-mesoporous SiO2 hybrid composite for fast and efficient removal of organic cationic contaminants

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CZEPA, Włodzimierz, PAKULSKI, Dawid, WITOMSKA, Samanta, PATRONIAK, Violetta, CIESIELSKI, Artur et SAMORÌ, Paolo, 2019. Graphene oxide-mesoporous SiO2 hybrid composite for fast and efficient removal of organic cationic contaminants. Carbon. 29 novembre 2019. Vol. 158, pp. 193-201. DOI 10.1016/j.carbon.2019.11.091.
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Version acceptée pour publication (post-print auteur)
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Auteurs Włodzimierz Czepa
Dawid Pakulski
Samanta Witomska
Violetta Patroniak
Artur Ciesielski
Paolo Samorì
Langue

en
Volume

158
Page de début

193
Page de fin

201
Date de première publication

2019-11-29
ISSN

00086223
Titre de la source (revue, livre…)

Carbon
Résumé

In this study, we have developed a novel mesoporous SiO2 - graphene oxide hybrid material (SiO2NH2-GO) as highly efficient adsorbent for removal of cationic organic dyes from water. The fabrication of such a three-dimensional (3D) SiO2NH2-GO Show moreIn this study, we have developed a novel mesoporous SiO2 - graphene oxide hybrid material (SiO2NH2-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 ∼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. Show less
DOI 10.1016/j.carbon.2019.11.091
Titre abrégé de la source

Carbon
Type de publication

ACL
Domaine

Chimie/Matériaux
Audience

International
Envoyer vers HAL

1
URL https://univoak.eu/islandora/object/islandora:85769