Structural and functional investigation of graphene oxide-Fe3O4 nanocomposites for the heterogeneous Fenton-like reaction

作者：Zubir, Nor Aida; Yacou, Christelle; Motuzas, Julius; Zhang, Xiwang; da Costa, Joao C. Diniz^*

来源：Scientific Reports, 2014, 4(1): 4594.

DOI：10.1038/srep04594

• PEROXIDASE-LIKE ACTIVITY
• REDUCED GRAPHENE
• FE3O4 NANOPARTICLES
• MAGNETIC NANOCOMPOSITES
• OXIDE NANOSHEETS
• IRON SURFACES
• REDUCTION
• DEGRADATION
• COMPOSITE
• CATALYST

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 10 wt%, associated with the beneficial intercalation of GO within Fe3O4 nanoparticles and resulting in higher surface area up to 409 m(2) g(-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.

• 出版日期2014-4-4