Graphene decorated with zinc oxide nanoparticles were synthesized in a single step. Through this process zinc oxide nanoparticles were deposited onto graphene nanosheets. The nano-composites were characterized usingX- rayDiffraction (XRD),Scanning Electron Microscope (SEM), energy dispersive spectroscopy (EDX), cyclic voltammetry and electrochemical impedance spectroscopy. The nanocomposite material displayed excellent catalytic properties toward Cholesterol in combination with cholesterol oxidase (ChOx). The cholesterol detection limit was found to be 5.0 μmol L-1 and a sensitivity 1.3 μA/μM cm2 with linear correlation coefficient R2 = 0.980. The Cholesterol oxidation also followed the Michaelis-Menten kinetics with apparent Km of 46.5 μM.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering