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202106003.pdf
文章编号： 1672-6987（2021）06-0028-07； DOI： 10.16351/j.1672-6987.2021.06.003
陈曦, 张峰*(青岛科技大学 环境与安全工程学院，山东 青岛 266042)
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（Cd2+）、铅离子（Pb2+）、铜离子（Cu2+）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2.0 nmol·L-1 Cd2+、0.1 nmol·L-1 Pb2+和1.2 nmol·L-1 Cu2+。
关键词： 氮掺杂石墨烯； 热处理； 重金属离子检测； 电化学传感
中图分类号： TP 212.2文献标志码： A
引用格式： 陈曦, 张峰. 氮掺杂石墨烯的制备及其在重金属离子检测中的应用［J］. 青岛科技大学学报(自然科学版), 2021, 42(6): 28-34.
CHEN Xi, ZHANG Feng. Preparation of nitrogen-doped graphene and its application in heavy metal ions detection［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2021， 42（6）： 28-34.
Preparation of Nitrogen-doped Graphene and Its Application
in Heavy Metal Ions Detection
CHEN Xi, ZHANG Feng
(College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: 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 (Cd2+), lead (Pb2+) and copper (Cu2+) 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 Cd2+, 0.1 nmol·L-1 Pb2+ and 1.2 nmol·L-1 Cu2+.
Key words: N-doped graphene; thermal annealing; heavy metal ions detection; electrochemical sensing
收稿日期： 2020-12-24
作者简介： 陈曦(1995—), 女, 硕士研究生.*通信联系人.
