脉冲电沉积氧化石墨烯纳米带修饰电极测定盐酸四环素  

Determination of Tetracycline Hydrochloride by Graphene Oxide Nanoribbons Modified Electrode via Pulse Electro-deposition

作　　者：兰天宇[1] 董泽刚[1] 陈孟娇 陈慧平[2] 杜海军[1] LAN Tian-yu;DONG Ze-gang;CHEN Meng-jiao;CHEN Hui-ping;DU Hai-jun(School of Chemical Engineering,Guizhou Minzu University,Guiyang 550025,China;College of Prep-education,Guizhou Minzu University,Guiyang 550025,China)

机构地区：[1]贵州民族大学化学工程学院,贵州贵阳550025 [2]贵州民族大学预科教育学院,贵州贵阳550025

出　　处：《化学试剂》2020年第4期396-400,共5页Chemical Reagents

基　　金：国家自然科学基金资助项目(81860701);贵州省留学人员科技活动择优资助项目(黔人项目资助合同(2018)008号);贵州省普通高等学校“绿色化学与资源环境创新团队”项目(黔教合人才团队字[2015]62);贵州民族大学科研基金项目(2017YB062)。

摘　　要：以多壁碳纳米管为原料制备氧化石墨烯纳米带(GONRs),通过红外光谱、紫外-可见吸收光谱和拉曼光谱对其进行表征。将制备好的GONRs脉冲电沉积到玻碳电极(GCE)表面制备修饰电极(GONRs/GCE),研究了盐酸四环素(TC)在GONRs/GCE上的电化学行为。结果表明,与裸玻碳电极相比,GONRs/GCE对TC有更高的电催化活性。TC在GONRs/GCE上发生受吸附控制的不可逆氧化反应,且在pH 3.0的柠檬酸-柠檬酸钠缓冲溶液中氧化峰电流最高。优化条件下,TC的氧化峰电流与浓度线性相关,线性范围为4.0×10^-7~1.0×10^-4 mol/L,最低检测限为2.0×10^-7 mol/L(S/N=3)。将该电极用于河水样品中TC的检测,加标回收率为97.2%~104.1%。Graphene oxide nanoribbons(GONRs)were prepared by using multi-walled carbon nanotubes as raw materials,and characterized by infrared spectroscopy,ultraviolet-visible absorption spectroscopy and Raman spectroscopy.The prepared GONRs were electrodeposited onto the surface of glassy carbon electrode to obtain modified electrode(GONRs/GCE).The electrochemical behavior of tetracycline hydrochloride(TC)on GONRs/GCE were investigated.The results showed that GONRs/GCE had higher electrocatalytic activity for TC comparing with bare glassy carbon electrode.TC undergone adsorption-controlled irreversible oxidation reaction on GONRs/GCE,and the oxidation peak current was highest in the pH 3.0 citric acid-sodium citrate buffer solution.Under optimized conditions,the oxidation peak current of TC showed a good linear relationship with the concentration.The linear range was 4.0×10-7~1.0×10-4 mol/L,and the detection limit was 2.0×10-7 mol/L(S/N=3).The modified electrode was applied to the detection of TC in river samples,and the recovery rate was 97.2%~104.1%.

关 键 词：盐酸四环素 氧化石墨烯 纳米带 脉冲电沉积 电化学传感 

分 类 号：O657.1[理学—分析化学] X832[理学—化学]