A hydrothermally prepared reduced graphene oxide-supported copper ferrite hybrid for glucose sensing

A stable enzyme-free glucose sensor was fabricated via a facile in situ hydrothermal route by the formation of CuFe2O4 nanoparticles into the graphene oxide sheets. The contents of graphene oxide in composites were varied from 10 to 30 wt%. The morphology of formed CuFe2O4/rGO nanocomposite was found by TEM analysis. The electrocatalytic activity of different CuFe2O4/rGO samples towards glucose oxidation was studied by employing cyclic voltammetry and chronoamperometry techniques. CuFe2O4/rGO(30 wt%) sample showed the highest oxidation current. An excellent sensitivity value of 1824.22 mu A mM(-1) cm(-2) with a detection limit of 1.0 mu M was gained by CuFe2O4/rGO(30 wt%). The sensor also exhibits good reproducibility and long term stability as well as high selectivity with insignificant interference from ascorbic acid and uric acid. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.