原位氮掺杂石墨烯修饰电极同时检测苯二酚3种异构体  

Nitrogen Doped Graphene Electrodes for Simultaneous Detection of Dihydroxybenzene Isomer

作　　者：周海逢[1] 郑凤英[2,1] 吴艺津 郭艺娟[1] 叶妙娟 李顺兴[2,1] 

机构地区：[1]闽南师范大学化学与环境学院,福建漳州363000 [2]福建省现代分离分析重点实验室,福建漳州363000

出　　处：《分析科学学报》2016年第6期746-752,共7页Journal of Analytical Science

基　　金：国家自然科学基金(No.20977074;21175115;21475055);教育部新世纪优秀人才支持计划(No.NCET-11;0904);福建省杰出青年科学基金(No.2010J06005)

摘　　要：利用多巴胺的聚合及还原特性,制备聚多巴胺包覆还原氧化石墨烯,在氮气保护下煅烧,制得氮原位掺杂石墨烯（C/N-Graphene）。应用扫描电镜（SEM）、透射电镜（TEM）、傅里叶变换红外（FT-IR）光谱表征该复合物的形貌和结构。应用滴涂及Nafion膜固定法制备C/N-Graphene修饰玻碳电极（C/N-Graphene/GCE）。该修饰电极对苯二酚3种异构体的氧化反应表现出优异的电催化性能和选择性,差分脉冲伏安法（DPV）峰电流与对苯二酚（HQ）、邻苯二酚（CC）、间苯二酚（RC）的浓度呈良好的线性关系,其线性范围分别为0.5~1 000μmol/L、0.5~460μmol/L和0.1~580μmol/L,检出限分别为0.251μmol/L、0.144μmol/L和0.072μmol/L。该方法应用于药厂废水和江水检测,3种苯二酚异构体回收率为97.0%~103.0%,相对标准偏差（RSD）小于5%（n=5）,结果表明C/N-Graphene/GCE修饰电极适用于污染水样的快速检测。Polydopamine coated graphene oxide was prepared, and calcined under the nitrogen protection to obtain nitrogen doped graphene nanocomposite（C/N-Graphene）. The morphology and structure of C/ N-Graphene were characterized by scanning electron microscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy. C/N-Graphene was modified onto glassy carbon electrode as the working electrode （C/N-Graphene/GCE） to detect dihydroxybenzene isomer. A good linear relationship between differential pulse voltammetry peak current and the concentration of hydroquinone （HQ）, catechol（CC） ,resorcinol（RC） was observed. Dihydroxybenzene isomer could be detected simultaneously with a wide linear range and low detection limits. The concentration of HQ, CC, RC in pharmaceutical wastewater and river water could be determined, the recovery was 97. 0%-103. 0% with the relative standard deviation less than 5%（n= 5）. This indicates C/N-Graphene/GCE electrode could be used for the rapid determination of dihydroxybenzene isomers in waste.

关 键 词：聚多巴胺 氮掺杂石墨烯 苯二酚异构体 电化学检测 

分 类 号：O657.15[理学—分析化学]