For Better Performance Please Use Chrome or Firefox Web Browser

Cobalt Ferrite Nanoparticles Decorated on Exfoliated Graphene Oxide, Application for Amperometric Determination of NADH and H2O2, Ali A. Ensafi, Hossein A. Alinajafi, M. Jafari-Asl, B. Rezaei, F. Ghazaei, Material Sci. Eng. C, 2016, 60, 276–284.

Here, cobalt ferrite nanohybrid decorated on exfoliated graphene oxide (CoFe 2 O 4 /EGO) was synthesized. The nanohybrid was characterized by different methods such as X-ray diffraction spectroscopy, scanning electron microscopy, energy dispersive X-ray diffraction microanalysis, transmission electron microscopy, FT-IR, Raman spectroscopy and electrochemical methods. The CoFe 2 O 4 /EGO nanohybrid was used to modify glassy carbon electrode (GCE). The voltammetric investigations showed that CoFe 2 O 4 /EGO nanohybrid has synergetic effect towards the electro-reduction of H 2 O 2 and electro-oxidation of nicotinamide adenine dinucleotide (NADH). Rotating disk chronoamperometry was used for their quantitative analysis. The calibration curves were observed in the range of 0.50 to 100.0 μmol L−1 NADH and 0.9 to 900.0 μmol L−1 H 2 O 2 with detections limit of 0.38 and 0.54 μmol L−1 , respectively. The repeatability, reproducibility and selectivity of the electrochemical sensor foranalysis of the analytes were studied. The new electrochemical sensor was successfully applied for the determination of NADH and H 2 O 2 in real samples with satisfactory results.

Journal Papers
Month/Season: 
January
Year: 
2016