Structural and functional investigation of graphene oxide-Fe 3 O 4 nanocomposites for the heterogeneous Fenton-like reaction

• Published in: Scientific Reports
• Main Author: Zubir N.A.; Yacou C.; Motuzas J.; Zhang X.; Diniz Da Costa J.C.
• Format: Article
• Language: English
• Published: Nature Publishing Group 2014
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84898755987&doi=10.1038%2fsrep04594&partnerID=40&md5=e533c96740856fd33b5f4cb6fdcf518b

Graphene oxide-iron oxide (GO-Fe3O4) nanocomposites were synthesised by co-precipitating iron salts onto GO sheets in basic solution. The results showed that formation of two distinct structures was dependent upon the GO loading. The first structure corresponds to a low GO loading up to 10wt%, associated with the beneficial intercalation of GO within Fe3O4nanoparticles and resulting in higher surface area up to 409m2g-1. High GO loading beyond 10 wt% led to the aggregation of Fe3O4 nanoparticles and the undesirable stacking of GO sheets. The presence of strong interfacial interactions (Fe-O-C bonds) between both components at low GO loading lead to 20% higher degradation of Acid Orange 7 than the Fe3O4 nanoparticles in heterogeneous Fenton-like reaction. This behaviour was attributed to synergistic structural and functional effect of the combined GO and Fe3O4 nanoparticles.