摘要
采用水热法制备了纳米MnO2,并用红外光谱,X射线衍射(XRD)和扫描电子显微镜(SEM)对其进行了表征。将碳纳米管和纳米MnO2分散在壳聚糖溶液中,用滴涂法固定到玻碳电极表面,制成修饰电极。利用计时电流法对该葡萄糖传感器的性能进行了研究,纳米MnO2-MWCNTs复合物对葡萄糖的氧化有明显的催化作用。在优化的条件下,葡萄糖在5.0×10-5～3.0×10-2mol/L浓度范围内,计时电流与浓度之间呈线性关系,检出限为1.5×10-5 mol/L(S/N=3)。对1.0×10-3 mol/L葡萄糖溶液平行测定8次的相对标准偏差(RSD)为2.1%。该传感器可成功用于葡萄糖注射液中葡萄糖的测定,回收率在96.4%～98.6%之间。
MnO2 uanocrystals were successfully synthesized by hydrothermal method. The prepared MnO2 nanocrystals were characterized by infrared spectroscopy （IR）, X-ray diffraction （XRD） and scanning electron microscope （SEM）. A glucose amperometric sensor was fabricated by immobilizing the composite of carbon nanotubes and MnO2 nanoparticles onto a glassy carbon electrode surface. The sensor performance was investigated by chronoamperometric method. Results showed nano MnO2-MWCNTs composite showed an obvious catalytic effect toward glucose oxidation. There was a linear relationship between the oxidation currents and the concentrations of glucose in the range of 5.0 × 10^-5-3.0×10^-2 mol/L with a detection limit of 1. 5 ×10^-5 mol/L（S/N = 3）. Relative standard deviation was 2. 1% for 1.0 ×10^-3 mol/L glucose solution （ n = 8 ）. The sensor can be applied to the determination of glucose in glucose injections with a recoveries between 96. 4% and 98.6%.
出处
《分析试验室》
CAS
CSCD
北大核心
2012年第3期62-65,共4页
Chinese Journal of Analysis Laboratory
基金
江苏省大学生创新训练计划项目(2160081)
南京大学生命分析化学教育部重点实验室开放研究基金(KLACLS08001)项目
南京晓庄学院科研项目(2010KYYB19)资助
