摘要
以天然鳞片石墨为原料,采用改进的Hummers法制备了氧化石墨(GO),以GO和硫氰酸铵为前驱体,采用一步水热法制备了硫氮共掺杂石墨烯(SNG)。X射线衍射、扫描电子显微镜和拉曼光谱分析结果显示,硫和氮成功掺入石墨烯晶格中,SNG表面褶皱明显且形成了三维孔道结构。通过交流阻抗、循环伏安法和差分脉冲伏安法考察了对苯二酚(HQ)、邻苯二酚(CC)和间苯二酚(RC)在修饰玻碳电极(SNG-180/GCE)上的电化学行为。结果表明:硫氮共掺杂能有效改善石墨烯的电化学性能,修饰电极实现了对HQ、CC和RC的同时检测,线性范围在5.5~43.06μmol/L和90.91~245.28μmol/L之间,检出限为1.83μmol/L(信噪比为3)。
Graphite oxide(GO)was prepared by a modified Hummers method with the graphite as raw materials,and then the sulfer and nitrogen co-doped graphene(SNG)were fabricated by one-step hydrothermal method using GO and ammonium thiocyanate as the precursors.The scanning electron microscopy(SEM),X-ray diffraction(XRD)and Raman were used to characteristic the morphology and structure of SNG.The results shown that the S and N were successfully doped into graphene lattice,co-doped graphene with the surface wrinkled,and formed the 3D porous architecture.The electrochemical behavior of HQ,CC and RC on the SNG modified electrode(SNG-180/GCE)were investigated by electrochemical impedance spectroscopy(EIS),cyclic voltammetry(CV)and differential pulse voltammetry(DPV)techniques.The results indicated that the electrochemistry property of graphene could be effectively improved by co-doping,the modified electrode can be used for the simultaneous determination of HQ,CC and RC,and the linear response ranges were 5.5~43.06μmol/L and 90.91~245.28μmol/L with the detection limits(S/N=3)were 1.83μmol/L.
作者
齐亚娥
赵鸿斌
任雪峰
金小青
Qi Yae;Zhao Hongbin;Ren Xuefeng;Jin Xiaoqing(College of Chemistry and Chemical Engineering,Hexi University,Key Laboratory of Hexi Corridor Resources Utilization of Gansu,Zhangye 734000)
出处
《化工新型材料》
CAS
CSCD
北大核心
2020年第3期129-133,共5页
New Chemical Materials
基金
甘肃省科技计划资助(18JR3RG203)。
关键词
硫氮共掺杂
石墨烯
水热法
修饰电极
sulfer and nitrogen co-doping
graphene
hydrothermal method
modified electrode
