氮掺杂石墨烯的制备及其在重金属离子检测中的应用  

Preparation of Nitrogen-doped Graphene and Its Application in Heavy Metal Ions Detection

作　　者：陈曦 张峰[1] CHEN Xi;ZHANG Feng(College of Environment and Safety Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学环境与安全工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2021年第6期28-34,共7页Journal of Qingdao University of Science and Technology:Natural Science Edition

摘　　要：以尿素为前驱体,通过热退火的方式制备了氮掺杂石墨烯,通过调节尿素的比例,制备了不同氮含量的氮掺杂石墨烯,并探究了其在重金属离子检测方面的应用。利用扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)、傅里叶变换红外(FT-IR)、X射线光电子能谱(XPS)、元素分析(EA)对材料进行了表征,采用各种电化学方法测试了电化学检测镉离子(Cd^(2+))、铅离子(Pb^(2+))、铜离子(Cu^(2+))性能,实验结果表明:尿素与氧化石墨烯比例为5∶1制备的氮掺杂石墨烯,检测重金属离子具有较好的灵敏度,最低可检测2.0nmol·L^(-1) Cd^(2+)、0.1nmol·L^(-1) Pb^(2+)和1.2nmol·L^(-1) Cu^(2+)。In this paper,nitrogen-doped graphene was prepared by thermal annealing by using urea as the precursor.By adjusting the ratio of urea,nitrogen-doped graphene with different nitrogen content was prepared,and its application in the detection of heavy metal ions was explored.The materials were characterized by SEM,TEM,XRD,FT-IR,XPS and elemental analysis,etc.And the electrochemical properties of cadmium(Cd^(2+)),lead(Pb^(2+))and copper(Cu^(2+))were tested by various electrochemical methods.The results show that the nitrogen-doped graphene has a high sensitivity of heavy metal ions detection when the ratio of urea to graphene oxide is 5∶1,and the limit of detection are 2.0 nmol·L^(-1) Cd^(2+),0.1 nmol·L^(-1) Pb^(2+)and 1.2 nmol·L^(-1) Cu^(2+).

关 键 词：氮掺杂石墨烯 热处理 重金属离子检测 电化学传感 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]