【作者】 王文娟； 赵继华； 杨长福； 王宏奎； 沈伟国； 方建；

【Author】 Wen-Juan Wang~a,Ji-Hua Zhao~a,Chang-fu Yang~a,Hong-Kui Wang~a,Wei-Guo Shen~(a,b), Jian Fang~(a *) a School of chemistry and chemical Engineering,Lanzhou University,Lanzhou 730000,China b School of chemistry and chemical Engineering,East China University of Science and Technology,Shanghai 200237,China

【机构】 兰州大学化学化工学院； 华东理工大学化学学院；

【摘要】 普鲁士蓝类配合物（PBA）具有电化学可逆性良好,制备成本低以及稳定性高的优点,但是将它们作为传感器的研究还很少,特别是钴铁普鲁士蓝类配合物（Co-Fe PBA）复合修饰电极的研究更少。本论文中采用单微乳液法制备了100-120 nm含Cs⁺的Co-Fe PBA,然后将Co-Fe PBA与多壁碳纳米管（MWNTs）超声混合,制备了MWNTs/Co-Fe PBA/GC复合修饰电极。使用电化学工作站CHI600C,用三电极体系在混合磷酸盐缓冲溶液（PBS）中进行循环伏安（CV）测定。考察了扫描速度、Co-Fe PBA浓度、MWNTs浓度、pH值对修饰电极催化性能的影响。研究发现,在扫速为100mv/s,Co-Fe PBA和MWNTs浓度均为10 g/L,pH为5.8的条件下,修饰电极的电流响应信号最大。最后用MWNTs/Co-Fe PBA/GC复合修饰电极检测低浓度的H₂O₂,发现在1.0×10^-6M-1.1×10^-3M范围内H₂O₂浓度与修饰电极的氧化峰电流呈线性关系,检测限为2.5×10^-7M,灵敏度为255μA·mM^-1·cm^-2。更多还原

【Abstract】 Prussian blue analogous complexes（PBA） have the advantages of good electrochemical reversibility,low cost and high stability.But there are a little reports about PBA as sensors.In this paper,Co-Fe PBA,which were synthesized in microemulsion,were mixed with multi-walled carbon nanotubes（MWNTs） through the ultrasonic method and MWNTs/ Co-Fe PBA/GC composite modified electrode was prepared.Using electrochemistry workstation CHI600C and 3-electrode cell,CV was performed in the mixed phosphate buffer solution.The influence of scanning speeds,Co-Fe PBA concentrations,MWNTs concentrations,pH values on modified electrode was studied.It is found that the current response signal of MWNTs/Co-Fe PBA/GC composite modified electrode is the largest in the conditions of scan rate 100mv/s,Co-Fe PBA concentration 10g/L,MWNTs concentration 10g/L and pH 5.8.Futhermore,using MWNTs/Co-Fe PBA/GC composite modified electrode,a low contentration of H₂O₂ was detected and the results showed a linearity range from 1.0×10^-6～1.1×10^-3M,a detection limit of 2.5×10^-7M,and a sensitivity of 255μA·mM^-1·cm^-2.更多还原