摘要
详细阐述了聚硫堇/金纳米粒子/还原型氧化石墨烯修饰玻碳电极(PTh/AuNPs/rGO/GCE)为基础的电流型传感器的制备及其在过氧化氢检测中的应用.首先,以石墨粉为原料制备氧化石墨烯,通过扫描电子显微镜、紫外-可见吸收光谱、红外光谱对氧化石墨烯的形貌和结构进行表征.其次,利用电还原方法制备还原型氧化石墨烯/玻碳电极(rGO/GCE).在氯金酸溶液中,rGO/GCE通过电还原方法得到相应的金纳米粒子修饰的rGO/GCE(AuNPs/rGO/GCE).最后,采用电聚合方法将硫堇(Th)聚合到电极表面制备对过氧化氢有响应性的PTh/AuNPs/rGO/GCE电化学传感器.该传感器对过氧化氢表现出良好的选择性和响应性,检测过氧化氢浓度的线性范围为4~80 mmol/L,检出限低至0.1 mmol/L.该研究为过氧化氢的简单快速分析提供了新思路.
The fabrication of a sensor based on polythionine(PTh)/gold nanoparticles(AuNPs)/reduced graphene oxide(rGO)composite modified glassy carbon electrode(PTh/AuNPs/rGO/GCE)and its application in the detection of H 2O 2 were described in details.Graphene oxide(GO)was first prepared from graphite powder,which was fully characterized by scanning electron microscopy,UV-Vis spectroscopy and infrared spectroscopy.Secondly,reduced graphite oxide/glassy carbon electrode(rGO/GCE)was prepared by electroreduction.In chloroauric acid solution,the corresponding gold nanoparticles modified rGO/GCE(AuNPs/rGO/GCE)was obtained by electroreduction of rGO/GCE.Finally,a PTh/AuNPs/rGO electrochemical sensor responsive to H 2O 2 was prepared using thionine(Th)as a functional monomer.The electrochemical behavior of H 2O 2 on the modified electrode PTh/AuNPs/rGO/GCE was investigated by cyclic voltammetry.Under the optimized conditions,the linear range for the detection of H 2O 2 concentration was 4-80 mmol/L and the detection limit was 0.1 mmol/L.This study provides a new idea for the simple and rapid analysis of H 2O 2.
作者
韩双
张蔓琳
杨金栾
张璇
张楠
张志超
HAN Shuang;ZHANG Manlin;YANG Jinluan;ZHANG Xuan;ZHANG Nan;ZHANG Zhichao(Shenyang University of Chemical Technology,Shenyang 110142,China)
出处
《沈阳化工大学学报》
CAS
2023年第2期97-103,共7页
Journal of Shenyang University of Chemical Technology
基金
辽宁省自然科学基金项目(2019-ZD-0086)
辽宁省教育厅项目(LJ2020009)
沈阳化工大学青年育苗项目(XXLQ2019004)
国家自然科学基金面上项目(21674066)。
关键词
石墨烯
硫堇
过氧化氢
电化学
金纳米粒子
graphene
thionine
hydrogen peroxide
electrochemistry
gold nanoparticles
