Highly sensitive simultaneous determination of cadmium (II), lead (II), copper (II), and mercury (II) ions on N-doped graphene modified electrode

作者：Xing, Huakun; Xu, Jingkun; Zhu, Xiaofei; Duan, Xuemin^*; Lu, Limin^*; Wang, Wenmin; Zhang, Youshan; Yang, Taotao

来源：Journal of Electroanalytical Chemistry, 2016, 760: 52-58.

DOI：10.1016/j.jelechem.2015.11.043

• Nitrogen doped graphene
• Simultaneous determination
• Heavy metal ions
• Differential pulse stripping voltammetry
• Sensor

Toxic heavy-metal ions are well known to be severely harmful to human health. Therefore, the development of fast and sensitive methods for their detection has drawn a great attention in recent years. Herein, a sensitive electrochemical platform for the simultaneous determination of Cd2+, Pb2+, Cu2+, and Hg2+ has been constructed based on N-doped graphene (NG) modified electrode using differential pulse stripping voltammetry (DPSV). NG was synthesized by a facile, efficient and green electrochemical method. The structure and composition of NG were studied by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron microscopy (XPS) techniques, chronocoulometry and N-2 adsorption-desorption measurements. The NG modified electrode showed excellent catalytic activity for selective detection of Cd2+, Pb2+, Cu2+, and Hg2+ due to its particular structure and unique electronic properties. Under optimal conditions, the limits of detection were estimated to be 0.05 mu M for Cd2+ and Hg2+, 0.005 mu M for Pb2+ and Cu2+, respectively. Finally, the method was applied to the simultaneous detection of trace metal ions in the tap water samples.

• 出版日期2016-1-1
• 单位江西农业大学; 江西科技师范大学