摘要
该文首次利用化学气相沉积法在石墨基体上直接生长出碳纳米管,制备了对槲皮素具有电催化氧化的碳纳米管修饰石墨电极(CNTs/C),槲皮素在该修饰电极上发生可逆的氧化还原反应。在B-R缓冲溶液(pH1.81)中,氧化峰电流与槲皮素的浓度在1.0×10-7～5.0×10-4mol/L范围内呈线性关系,相关系数为0.9980,检测限为1.5×10-8mol/L,当槲皮素的浓度为1.0×10-5mol/L时,测得槲皮素的RSD(n=5)为2.3%,回收率在95.1%～100.7%之间。
In this paper,a new carbon nanotubes which were grown directly on a graphite by a chemical vapor deposition method modified graphite electrode（CNTs/C） behaving with electrocatalytic oxidation toward quercetin was prepared firstly.The electrochemical behavior of the modified electrode was studied by using a tri-electrode system with the modified electrode（CNTs/C）as working electrode,SCE as reference eletrode and Pt-wire as counter electrode.In the B-R buffer solution of pH1.81,It was found that two redox peaks of quercetin at the carbon nanotubes modified graphite electrode were observed.Linear relationship was kept with the concentration of quercetin in the range of 1.0×10^-7 to 5.0×10^-4 mol/L,with a correlation coefficient of 0.998 0 and detection limit of 1.5×10^-8 mol/L.RSD（n=5） tested at 1.0×10^-5 mol/L was 2.3%.The recoveries tested gave values in the range of 95.1% to 100.7%.
出处
《化学传感器》
CAS
2010年第1期60-65,共6页
Chemical Sensors
基金
湖南省自然科学基金(NO.07JJ6101)资助项目
关键词
化学气相沉积
碳纳米管
槲皮素
电催化氧化
chemical vapor deposition
carbon nanotubes
quercetin
electrocatalytic oxidation
