کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
866967 | 1470984 | 2013 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Amperometric glucose sensor based on nickel nanoparticles/carbon Vulcan XC-72R Amperometric glucose sensor based on nickel nanoparticles/carbon Vulcan XC-72R](/preview/png/866967.png)
A stable non-enzymatic glucose sensor was constructed by chemical deposition of nickel nanoparticles on carbon Vulcan XC-72R using microwave irradiation technique. The mode and time of microwave irradiation during nickel salt reduction were varied. This was found to affect the morphology of formed Ni/C powder as evidenced by TEM analysis. Nickel nanoparticles aggregation becomes more serious at longer microwave irradiation times. The electrocatalytic activity of different Ni/C samples towards glucose oxidation was studied in KOH solution by employing cyclic voltammetry and chronoamperometry techniques. Ni/C sample, prepared by pulse mode with total operating time of 150 s, showed the highest oxidation current density. An excellent sensitivity value of 1349.7 μA mM−1 cm−2 with a detection limit of 0.232 μM was gained by Ni/C sensor. It also exhibits good reproducibility and long-term stability, as well as high selectivity with insignificant interference from ascorbic acid.
► Electro-oxidation current density of glucose at Ni/C increases at longer pulse mode time.
► Ni/C showed acceptable selectivity towards glucose in presence of ascorbic acid.
► Ni/C achieved a sensitivity value of 1349.7 μA mM−1 cm−2 and a detection limit of 0.232 μM.
► A good reproducibility and long-term stability characterized the application of Ni/C.
Journal: Biosensors and Bioelectronics - Volume 47, 15 September 2013, Pages 248–257