基于温度敏感聚合物复合材料修饰传感器测定邻苯二酚  

Determination of catechol based on temperature-sensitive polymer composite modified sensors

作　　者：黄志遥 胡密 彭欢[1] 李曼 饶丽容 吴婵 HUANG Zhiyao;HU Mi;PENG Huan;LI Man;RAO Lirong;WU Chan(Petrochemical Engineering College,Hunan Petrochemical Vocational Technology College,Yueyang 414012,China)

机构地区：[1]湖南石油化工职业技术学院,湖南岳阳414012

出　　处：《粘接》2025年第3期67-71,共5页Adhesion

基　　金：2022年度湖南省教育厅科学研究项目(项目编号:22C1065)。

摘　　要：在电极表面,创新性地引入溴氧化铋、氧化石墨烯的复合物,并使其与温敏聚合物聚N,N-二乙基丙烯酰胺(P(DEA-co-NIPAM))相融合,由此成功构建出一种能够对邻苯二酚实现智能“可逆开关”式检测的体系。低温环境下,温度敏感聚合物P(DEA-co-NIPAM)的分子架构呈现拉伸形态,P(DEA-co-NIPAM)/BiO⁃Br-GO修饰电极检测邻苯二酚并不会引发明显的电化学响应,传感器即刻“关闭”;一旦温度升高,温敏聚合物的结构迅速收缩,电信号随之显著增强,传感器即刻“打开”。在经历了多次循环往复的升降温流程后,成功搭建起一种智能“可逆式”电化学传感模式,经实验论证,该模式不仅稳定性出众,能持续精准输出信号,始终保持高效灵敏,切实达成了对邻苯二酚检测的智能可逆操控。对邻苯二酚的检测,P(DEA-co-NI⁃PAM)/BiOBr-GO电极针表现优异,其最低检出限精准至0.142μmol/L,线性检测范围有效覆盖2~150μmol/L,不仅具备极佳的可定性,稳定性也十分突出。On the surface of the glassy carbon electrode,a compound of bismuth oxybromide and graphene oxide was innovatively introduced and fused with the temperature-sensitive polymer P(DEA-co-NIPAM),thereby successfully building a system capable of intelligent“reversible switch”detection of catechol.When the molecular structure of P(DEA-co-NIPAM)is stretched at low temperature,catechol does not cause obvious electrochemical response on the P(DEA-co-NIPAM)/BiOB-GO modified electrode,and the sensor seems to enter the“off”state.Once the temperature rises,the structure of P(DEA-co-NIPAM)rapidly shrinks,and the corresponding electrochemical activity is significantly enhanced,and the sensor is immediately“switched on”.In particular,a stable and accurate intelligent“reversible switch”electrochemical sensing mode is established during the cyclic operation of multiple ups and downs.After experimental demonstration,the P(DEA-co-NIPAM)/BIOB-Go modified electrode shows excellent performance for the detection of catechol,its minimum detection limit is accurate to 0.142μmol/L,the linear detection range effectively covers 2~150μmol/L,not only has excellent reversible characteristics,but also outstanding stability.It can accurately determine trace catechol content in tap water reliably and efficiently,providing a new and powerful technical support for water quality monitoring.

关 键 词：温敏聚合物 邻苯二酚 电化学传感器 

分 类 号：O657.12[理学—分析化学] X832[理学—化学]