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Entrapment and stabilization of iron nanoparticles within APTES modified graphene oxide sheets for catalytic activity improvement

Abstract : In this work, for the first time, a grafting of 3-aminopropyltriethoxysilane (APTES) followed by incorporation of iron nanoparticles (Fe-NPs) was used for the functionalization of graphene oxide (GO). Changes in stability, structural, morphological, thermal and catalytic properties of the resulting GO/APTES/Fe material were investigated by scanning electron microscopy, transmission electron microscopy, energy dispersive X-Ray, Fourier transform infrared and UV–visible spectroscopies, zeta potential measurements, X-ray photoelectron spectroscopy and differential scanning calorimetry. The average crystallite size of GO/APTES/Fe was found to decrease significantly after the post treatment, producing slight structure compaction. Iron nanoparticles were immobilized by APTES on the GO sheets, with a particle size around 50 nm. Fe insertion and APTES grafting resulted in high thermal stability of GO. As an application, GO/APTES/Fe exhibited an excellent catalytic activity in the reduction of 4-nitrophenol into 4-aminophenol. The presence of both APTES and small amount of Fe nanoparticles in GO/APTES/Fe induced a significant improvement in catalytic activity. GO/APTES/Fe also showed appreciable recyclability after four repeated uses without noticeable loss in activity. This stability was higher to those of other GO-materials. The results obtained herein open new prospects for Fe-loaded organo-graphene oxide as efficient material in catalysis and industrial applications.
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https://hal.archives-ouvertes.fr/hal-01898982
Contributor : Nicolas Brun Connect in order to contact the contributor
Submitted on : Friday, October 19, 2018 - 10:45:28 AM
Last modification on : Friday, August 5, 2022 - 10:59:15 AM

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Nabil Bouazizi, Julien Vieillard, Radhouane Bargougui, N. Couvrat, O. Thoumire, et al.. Entrapment and stabilization of iron nanoparticles within APTES modified graphene oxide sheets for catalytic activity improvement. Journal of Alloys and Compounds, Elsevier, 2019, 771, pp.1090-1102. ⟨10.1016/j.jallcom.2018.08.240⟩. ⟨hal-01898982⟩

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