Au@MOF-5 Derived Carbon Composite Modified Electrode for Sensitive Electrochemical Detection of Vitamin C
By hydrothermal reaction of carbon derived from MOF-5(CC)and chloro-auric acid,carbon supported gold nanocomposites(Au@CC)were prepared.The morphology and crystal phase structure of the composites were analyzed by SEM and XRD.The electrochemical performance test shows that the sensor constructed with Au@CC(Au@CC/GCE)can enhance the electrochemical reaction of vitamin C(Vc)in PBS with pH=1.In the concentration range of 1.96～15.68×10-5 mol/L,the linear relationship between the oxidation peak current and the concentration of Vc measured by differential pulse voltammetry(DPV)is as follows:I(mA)=0.00348Ci(10-5mol/L)+0.00452(γ=0.997),the detection limit(LOD)was 0.010×10-5 mol/L(S/N=3).Au@CC/GCE is suitable for the detection of Vc samples.
MOF-5 derived carbonelectrochemical sensorphosphate buffer solutionVitamin C
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