摘要
结合分子印迹聚合物(MIP)的特异性识别能力及双极电化学发光传感(BPECL)的高灵敏、抗干扰特点,构建了一种MIP/BPECL传感器,用于水样中全氟辛烷磺酸(PFOS)的检测.以PFOS为模板分子,邻苯二胺(o-PD)为功能单体,在双极电极的阴极端电聚合分子印迹聚合物以特异性识别PFOS,采用扫描电子显微镜(SEM)和循环伏安法(CV)对电极进行了表征;在双极电极的阳极端以钌联吡啶/三正丙胺[Ru(bpy)_(3)^(2+)/TPr A]为输出信号,构筑了传感与信号分离的MIP/BPECL传感体系.在最优条件下,该传感器对PFOS浓度在1~1000nmol/L范围内呈现良好的线性关系,检出限为0.43 nmol/L(S/N=3).将该传感器应用于实际环境水样的加标回收检测,结果良好,表明所构建的MIP/BPECL传感器具有灵敏度高、特异性好及抗干扰能力强的优点.通过改变分子印迹的模板分子,有望实现该传感器在其它环境污染物检测上的应用.
Combining the specific recognition ability of molecular imprinting polymer(MIP)and the high sensitivity and anti-interference characteristics of bipolar electrochemical luminescence sensing(BPECL),an MIP/BPECL sensor was constructed for the detection of perfluorooctane sulfonate(PFOS)in sewage.Using PFOS as the template molecule and o-phenylenediamine(o-PD)as the functional monomer,the molecular-imprinted polymer was specifi⁃cally identified by negative extreme electropolymerization of bipolar electrodes.The electrodes were characterized by means of scanning electron microscopy(SEM)and cyclic voltammetry(CV).The MIP/BPECL sensing system was constructed with ruthenium bipyridine/tri-n-propylamine[Ru(bpy)_(3)^(2+)/TPrA]as the output signal at the positive extremity of the bipolar electrode.Under optimized conditions,the electrochemical sensor displayed a wide linear range from 1 nmol/L to 1000 nmol/L with a low limit of detection of 0.43 nmol/L(S/N=3).The sensor is applied to the actual sample of the environmental water labeling recovery test,and the result is good.The constructed MIP/BPECL sensor has the advantages of high sensitivity,good specificity and strong anti-interference ability.By changing the template molecule of molecular imprinting,it is expected to realize the application of this sensor in the detection of other environmental pollutants.
作者
黄声秀
刘利阳
杨伟强
汪庆祥
倪建聪
HUANG Shengxiu;LIU Liyang;YANG Weiqiang;WANG Qingxiang;NI Jiancong(School of Chemistry and Chemical Engineering,Environment and Minnan Normal University,Zhangzhou 363000,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2024年第6期22-29,共8页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:22376089)
福建省自然基金项目(批准号:2021J01991)资助。
关键词
全氟辛烷磺酸
分子印迹
双极电极
电化学发光
Perfluorooctane sulfonate
Molecular imprinting
Bipolar electrode
Electrochemiluminescence
