AL-NAFIEY, Amer; ADDAD, Ahmed; SIEBER, Brigitte; CHASTANET, Guillaume; BARRAS, Alexandre; SZUNERITS, Sabine; BOUKHERROUB, Rabah

doi:10.1016/j.cej.2017.04.039

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

AL-NAFIEY, Amer
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

ADDAD, Ahmed
Unité Matériaux et Transformations - UMR 8207 [UMET]

SIEBER, Brigitte
Unité Matériaux et Transformations - UMR 8207 [UMET]

Langue

Article de revue

Ce document a été publié dans

Chemical Engineering Journal. 2017, vol. 322, p. 375-384

Elsevier

Résumé en anglais

Water contamination with synthetic dyes and metal ions is an escalating problem, despite the huge research efforts put in the field of water treatment. The paper reports on one-step synthesis of reduced graphene oxide-cobalt oxide nanoparticles (rGO-Co3O4) nanocomposite under mild conditions. The nanocomposite material has been characterized using various analytical techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray (EDX) spectroscopy, UV–visible spectrophotometry and Fourier-transform infrared (FTIR) spectroscopy. The catalytic properties of the nanocomposite were demonstrated for the sodium borohydride-induced 4-nitrophenol reduction to 4-aminophenol. A full reduction has been achieved within less than 1 min at room temperature. Further, the nanocomposite was successfully applied for Cr(VI) adsorption with a maximum adsorption capacity of 208.8 mg.g−1, which is much higher than that obtained using many other magnetic adsorbents. Finally, the nanocomposite was found to be very efficient for anionic and cationic dye adsorption with complete removal within less than 2 min. The performance of the rGO-Co3O4 nanocomposite is quite high as compared to other graphene-based adsorbents. The ferromagnetic properties of the composite allowed effective separation and recyclability of the material by simple application of an external magnet.< Réduire

Mots clés en anglais

Co3O4

Reduced graphene oxide

4-Nitrophenol

Reduction

Cr(VI)

Dyes

Adsorption

reduced graphene oxide

4-nitrophenol

reduction

dyes

adsorption

Métadonnées

Licence d’utilisation du document

Reduced graphene oxide decorated with Co3O4 nanoparticles (rGO-Co3O4) nanocomposite: A reusable catalyst for highly efficient reduction of 4-nitrophenol, and Cr(VI) and dye removal from aqueous solutions

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

DOI

Origine

Unités de recherche