基于羧基化多壁碳纳米管的分子印迹电化学传感器检测罗丹明B  

Molecularly Imprinted Electrochemical Sensor Based on Carboxylated Multi-Walled Carbon Nanotubes for Detection of Rhodamine B

作　　者：刘心语 孙世民 李劲松 舒祖菊[1] 张利君 LIU Xin-Yu;SUN Shi-Min;LI Jin-Song;SHU Zu-Ju;ZHANG Li-Jun(School of Materials and Chemistry,Anhui Agricultural University,Hefei230006,China)

机构地区：[1]安徽农业大学材料与化学学院,合肥230006

出　　处：《分析化学》2024年第9期1365-1373,共9页Chinese Journal of Analytical Chemistry

基　　金：安徽省高校自然科学基金重点项目(No.KJ2021A0131);安徽省自然科学基金项目(Nos.1908085QB89,2008085MC84)资助。

摘　　要：将分子印迹聚合物(MIP)与羧基化多壁碳纳米管(f-MWCNT)引入到玻碳电极(GCE)表面,构建了一种用于罗丹明B(RhB)检测的电化学传感器。借助于f-MWCNT优异的导电性能以及MIP的高选择性,基于MIP/f-MWCNT/GCE的电化学传感器检测RhB时表现出优异的性能。在最优条件下,此传感器检测RhB具有宽的线性响应范围(0.01~30 nmol/L,30~500 nmol/L)和低至0.01 nmol/L的检出限。此传感器具有良好的选择性,与RhB结构相近的染料分子(罗丹明6G、亚甲基蓝和甲基橙)以及常见金属离子(K+、Ca2+、Mg2+和Fe3+)不干扰测定。此传感器还表现出良好的稳定性和重现性,利用其测定自来水和河水样品中的RhB,加标回收率分别为99.8%~105.6%和99.2%~105.0%,显示出良好的应用潜能。In this work,an electrochemical sensor for detection of Rhodamine B(RhB)was constructed by modifying molecularly imprinted polymer(MIP)and carboxylated multi-walled carbon nanotubes(f-MWCNTs)onto the surface of glassy carbon electrode(GCE).The MIP/f-MWCNT/GCE electrochemical sensor demonstrated outstanding performance in detection of RhB due to the excellent conductivity of f-MWCNT and synergistic selectivity of MIP.Under optimal experimental conditions,the sensor had a wide linear response range(0.01‒30 nmol/L,30‒500 nmol/L),with limit of detection of 0.01 nmol/L.In addition,the sensor exhibited excellent recognition ability to RhB in the presence of other structurally similar compounds(e.g.,Rhodamine 6G,methylene blue,and methyl orange),and common metal ions(K+,Ca2+,Mg2+and Fe3+).Furthermore,the sensor exhibited good stability and reproducibility.Additionally,the electrochemical sensor exhibited good practical adaptability when analyzing RhB in real samples,with recoveries ranging from 99.8%‒105.6%for tap water and 99.2%‒105.0%for river water samples.

关 键 词：分子印迹聚合物 电化学传感器 羧基化多壁碳纳米管 罗丹明B 

分 类 号：X832[环境科学与工程—环境工程] O657.1[理学—分析化学] TP212[理学—化学]