石墨烯/纳米金复合修饰电极的制备及电化学性能  

Preparation and electrochemical performance of graphene/nano-gold composite modified electrode

作　　者：李秋月 汤洪波[1] 周健[1] 王春艳 周晓燕 Li Qiu-yue;Tang Hong-bo;Zhou Jian;Wang Chun-yan;Zhou Xiao-yan(Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology,Yichun University,,Jiangxi Yichun 336000,China)

机构地区：[1]宜春学院江西省高校应用化学与化学生物学重点实验室,江西宜春336000

出　　处：《炭素技术》2021年第6期56-59,共4页Carbon Techniques

摘　　要：采用电化学还原法,通过简单沉积制备了一种稳定的r GO-Au/GCE复合膜修饰电极。结果显示:该复合修饰电极对多巴胺(DA)的测定具有良好的催化活性。优化条件下,多巴胺在-0.2~0.7 V范围内有1对可逆的氧化还原峰出现。DA复合电极的响应在1×10^(-5)~9×10^(-4)mol/L范围内呈线性关系,检测下限为1×10^(-8)mol/L。此外,该传感器在潜在干扰电活性物质的影响下表现出灵敏度高、选择性好、稳定性强等特性。In the experiment,an electrochemical reduction method is used to prepare a stable rGO-Au/GCE composite film modified electrode through simple deposition.The results show that the composite modified electrode has good catalytic activity for the determination of dopamine(DA).Under optimized conditions,dopamine has a pair of reversible redox peaks in the range of-0.2 to 0.7 V.The response of the DA composite electrode shows a linear relationship in the range of 1×10^(-5)~9×10^(-4) mol/L,and the detection limit is 1×10^(-8) mol/L.In addition,the sensor exhibits high sensitivity,good selectivity,and strong stability under the influence of potentially interfering electroactive substances.

关 键 词：石墨烯 纳米金 复合膜 电沉积 

分 类 号：O613.71[理学—无机化学] TB332[理学—化学]