电沉积制备纳米金-石墨烯复合材料修饰电极测定氨苄西林  

Electrodeposition of Au Nanoparticle-Graphene Composites Modified Electrode for Ampicillin Detection

作　　者：赵晶 刘诗伟 杨雨欣 罗佳 谢婧 廉文静 ZHAO Jing;LIU Shiwei;YANG Yuxin;LUO Jia;XIE Jing;LIAN Wenjing(College of Basic Science,Tianjin Agricultural University,Tianjin 300384,China)

机构地区：[1]天津农学院基础科学学院,天津300384

出　　处：《电镀与精饰》2022年第11期41-46,共6页Plating & Finishing

基　　金：天津市高等学校基本科研业务费天津农学院青年教师创新基金项目(2016JNYB03);国家级大学生创新训练计划项目(202010061004);国家自然科学基金青年基金项目(22102115)。

摘　　要：采用一步电沉积法在抛光处理后的玻碳电极表面制备纳米金-还原氧化石墨烯(AuNPs-rGO)复合材料,利用循环伏安法和电化学阻抗法研究AuNPs-rGO复合材料的电化学性质,并将其应用于氨苄西林分子印迹电化学传感器的构建中。结果表明:采用一步电沉积法制备的AuNPs-rGO复合材料具有制备过程简单可控,避免使用强还原剂带来污染的优点,仅需250 s就可在玻碳电极表面制备出导电性好、稳定性高的AuNPs-rGO复合材料。将其应用于氨苄西林分子印迹电化学传感器的构建可有效提高传感器的检测灵敏度和稳定性,实现氨苄西林的快速、灵敏检测。传感器的线性范围为3.00×10^(-9)~7.00×10^(-6) mol·L^(-1),最低检出限为1.26×10^(-9)mol·L^(-1)(S/N=3)。Au nanoparticle-reduced graphene oxide(AuNPs-rGO)composites were prepared on polished glassy carbon electrode by one-step electrodeposition method,the electrochemical properties of AuNPs-rGO composites were investigated by cyclic voltammetry and electrochemical impedance spectroscopy measurements,and AuNPs-rGO composites were applied to construct ampicillin molecularly imprinted electrochemical sensor.The results showed that AuNPs-rGO composites prepared by one-step electrodeposition method had many advantages such as simple and controllable preparation processes,could avoid pollution caused by strong reducing agent,and it only took 250 s to prepare AuNPs-rGO composites with good conductivity and high stability at glassy carbon electrode.AuNPs rGO composites could effectively improve the detection sensitivity and stability of the ampicillin molecularly imprinted electrochemical sensor,and the rapid and sensitive detection of ampicillin was achieved.The linear range of the sensor was from 3.00×10^(-9) to 7.00×10^(-6) mol·L^(-1),and the limit of detection was 1.26×10^(-9) mol·L^(-1)(S/N=3).

关 键 词：电沉积 纳米金 石墨烯 氨苄西林 

分 类 号：O652.1[理学—分析化学]