石墨烯修饰四溴双酚S印迹电化学传感器研究  

Graphene Modified Imprinted Electrochemical Sensor for Detection 3,3',5,5'-tetrabromobisphenol S

作　　者：蔡蓉[1] 饶维[1] 张朝晖[1,2] 

机构地区：[1]吉首大学化学化工学院,吉首416000 [2]湖南大学化学生物传感器与计量国家重点实验室,长沙410082

出　　处：《化学通报》2013年第10期923-928,共6页Chemistry

基　　金：国家自然科学基金(21005030和21267010)资助

摘　　要：以四溴双酚S为模板分子、吡咯为单体，采用电聚合方法在石墨烯修饰碳电极表面制备四溴双酚S印迹电化学传感器。采用扫描电子显微技术、循环伏安法以及差分脉冲伏安法对该印迹传感器的形貌和电化学性能进行表征。结果表明，该印迹电化学传感器对四溴双酚S具有很好的选择识别性能；在1．0×10-8～5．0×10-5mol／L浓度范围内，传感器的响应峰电流与四溴双酚S浓度的负对数呈良好的线性关系（R2=0．99），最低检测限为3．3×10-9mol／L（S／N=3）。该印迹电化学传感器成功用于雨水、自来水和矿泉水等实际样品中四溴双酚S浓度的检测。A graphene modified molecularly imprinted electrochemical sensor was fabricated with electropolymerization method using 3,3＇,5,5＇-tetrabromobisphenol S （TBBPS） as the template molecule and polypyrrole as the monomer. Prior to imprinting, the carbon electrode was electrodeposited with the aromatic diazonium salt which was used to adsorb graphene oxide. Then, the graphene oxide modified on the carbon electrode was reduced to graphene with electrochemical reduction technique. The graphene modified molecularly imprinted electrochemical sensor was characterized by SEM, CV and differential pulse vohammetry （DPV）. The results indicated that the graphene was modified on the carbon electrode successfully and the graphene modified imprinted electrochemical sensor exhibited excellent selectivity toward the template molecule TBBPS. The adsorption experiments showed that a linear relationship was obtained between the response currents and the negative logarithm of the TBBPS concentrates range of 5.0 × 10 -5 1.0 × 10-8 mol/L with the detection limit of 3.3×10-9 mol/L （ S/N = 3）. The graphene modified imprinted electrochemical sensor was applied to detect the TBBPS in rain, tap water and mineral water samples successfully.

关 键 词：四溴双酚S 石墨烯修饰电极 电沉积 传感器 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置] O657.1[自动化与计算机技术—控制科学与工程]