Glucose Sensor Based on Pt-RuO_2 Nanoparticles-Multi-walled Carbon Nanotubes Nanocomposite
Pt-RuO2 nanoparticles were supported on MWCNTs by an organic colloidal process.The catalyst was used for nonenzymatic glucose sensor by fixing it on the GCE with Nation.It was found that the modified electrode based on PtRuO2-MWCNTs nanocomposite showed high sensitivity to the oxidation of glucose with less interference by ascorbic acid(AA),dopamine(DA) or uric acid(UA) when detecting glucose.Using this amperomatric method,the linear range of the sensor was 2.0×10-3-1.0×10-2 mol/L(R=0.9965) with a response time of 4.8 s,and the detection limit reached 1.25×10μmol/L(S/N=3).It was demonstrated that the Pt-RuO2/MWNTs electrode could fabricated as an electrode for nonenzymatic glucose sensing.