基于新型聚硫堇/金属有机骨架复合材料的电化学传感器用于检测对硝基苯酚  

Novel Electrochemical Sensor Based on Polythionine/Cu(tpa)MOF Composite for the Detection of 4-Nitrophenol

作　　者：井翠洁 张玉冰[1] JING Cuijie;ZHANG Yubing(Key Laboratory of Sensor Analysis of Tumor Marker of Education Ministry ,Qingdao 266042, China;College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology,Qingdao 266042, China)

机构地区：[1]青岛科技大学肿瘤标志物传感分析教育部重点实验室化学与分子工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2019年第3期12-19,共8页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：青岛市技术合作项目(青技审字(2016)第75788号)

摘　　要：聚硫堇/金属有机骨架复合材料PTh/Cu(tpa)被制备并用于灵敏的检测对硝基苯酚(4-NP)。通过红外光谱(FT-IR)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)等仪器对Cu(tpa)及PTh/Cu(tpa)进行了表征。相对于裸电极及单一材料修饰电极,PTh/Cu(tpa)复合材料修饰电极对4-NP的检测具有更好的电化学响应,这可能归因于Cu(tpa)自身具有较大的比表面积,而聚硫堇的存在增加了Cu(tpa)的导电性,使得PTh/Cu(tpa)复合材料兼具有大的比表面积和良好导电性的性能,从而对目标物表现出协同的催化作用。在最优条件下,通过差分脉冲伏安法(DPV)对4-NP进行了检测,还原峰电流与4-NP的浓度在3×10^(-7)～1×10^(-5) mol·L^(-1)范围内呈良好的线性关系,检出限为7.1×10^(-8) mol·L^(-1)。Polythionine/Cu(tpa) composite was fabricated for the sensitive electrochemical determination of 4-nitrophenol. The synthesized Cu(tpa) and PTh/Cu(tpa) composite were characterized by FT-IR、SEM and TEM analysis. Compared with bare electrode and single material modified electrode, PTh/Cu(tpa) composite has the good electrochemical response for 4-NP detection, this may be attributed to the large specific surface area of Cu(tpa), the existence of Polythionine increases the conductivity of Cu(tpa). Therefore, the PTh/ Cu(tpa) composite possesses the property of large specific surface area and good electronic conductivity, thus exhibiting synergistic catalysis effect on the target. Under optimized preparation conditions, 4-NP was detected by differential pulse voltammetry (DPV), the reduction peak current vs the concentration of 4-NP exhibits a linear relation with the concentration range from 3×10^-7 -1×10 ^-5 mol·L^-1 , and the limit of detection was determined to be 7.1× 10 ^-8 mol·L^-1 .

关 键 词：对硝基苯酚 金属有机骨架 聚硫堇 复合材料 电化学传感 

分 类 号：TP212.3[自动化与计算机技术—检测技术与自动化装置]