Fabrication And Catalytic Glucose Oxidation Of Nanostructure Prepared From Ti-based Amorphous Alloys

Recently,more people suffer from the diabetes,which is recognized as an incurable worldwide disease.The enzymatic glucose sensor which is easily affected by temperature,humidity and PH value,is used to test the blood.So the non-enzymatic glucose sensors attract considerable attention.Nanostructured metals and metallic oxides are applied as non-enzymatic glucose sensor due to the large specific surface area,excellent electroconductivity and catalytic property.In this research,the nanostructured materials prepared from Ti₆₀Cu₄₀,Ti₆₀Cu₃₈Ag₂ and Ti₆₀Cu₃₈Au₂ amorphous alloys by anodization,are used to test the catalytic performance for glucose oxidation by the methods of cyclic voltammetry?CV?and chronoamperometry?CA?,the main results are listed as following:?1?Ti-Cu-O nanotubes,which were prepared from Ti₆₀Cu₄₀ amorphous alloy ribbons by anodization,are affected by concentration of electrolyte component.It is found that the nanotubes with a diameter of 22 nm were obtained in ethanediol solution containing 0.2wt.%NH₄F and 2.0 vol.%H₂O.The electrochemical behavior shows that the nanotube structure possess a sensitivity of 403.9?A·cm^-2·mM^-1with a linear range from 10?M-0.2 mM,low detection limit of 1.40?M?S/N=3?and excellent anti-interfence.?2?The morphology of Ti-Cu-Ag-O nanotubes were studied by different potential of 10 V,15 V,20 V and 25 V for different anodizing time of 18 s,1 min,2 min,3 min,5min and 30 min.The results of electrochemical testing show that the peak current density of nanotubular structure increases obviously with the addition of Ag.The Ti-Cu-Ag-O nanotubes possess the sensing performance of a sensitivity of 30.5?A·cm^-2·mM^-1with a linear range from 0.1 mM-1.3 mM and low detection limit of 22.4?M?S/N=3?.?3?Au-Cu nanoporous?NP Au-Cu?structure were fabricated by dealloying of Ti₆₀Cu₃₈Au₂amorphous alloy ribbons at potentials of 5 V,10 V,15 V and 20 V for 1 h,2 h and 4 h.The catalytic and sensing performance of Au-Cu nanoporous structure were tested by CV and CA.The NP Au-Cu exhibits a sensitivity of 31?A·cm^-2·mM^-1with a linear range from 1 mM-10mM and low detection limit of 46?M?S/N=3?.