Non-enzymatic glucose sensor fabricated by CoFe₂O₄ nanosheets grown on Reduced Graphene Oxide

A non-enzymatic glucose sensing nanocomposite comprised of CoFe₂O₄ nanosheets grown on Reduced Graphene Oxide (CoFe₂O₄@rGO) has been triumphantly prepared by a facile co-precipitation process. The characterisation results reveal that the CoFe₂O₄ nanosheets are vertically grown on the rGO substrate and form a porous network structure.    Next, Electrochemical workstation is applied to study the glucose detection performance of the CoFe₂O₄@rGO. The sensing tests exhibit that when the volume ratio of anhydrous ethanol and deionised water is 10 ml: 30 ml, the fabricated CoFe₂O₄@rGO has better glucose detection performance. Its linear detection ranges from 0.5 mM–10 mM and 10 mM–35 mM, and the sensitivity reaches 50.5 μAmM⁻¹cm⁻² and 143.6 μAmM⁻¹cm⁻² respectively, which is significantly better than the previously reported non-enzyme glucose sensing materials. Furthermore, the CoFe₂O₄@rGO has good anti-interference and stability.