基于介孔氮化碳/自掺杂聚苯胺纳米纤维和方波阳极溶出伏安法测定镉和铅

Determination of Cd and Pb Based on Mesoporous Carbon Nitride/Self-Doped Polyaniline Nanofibers and Square Wave Anodic Stripping Voltammetry.

作者信息

Zhang Chang, Zhou Yaoyu, Tang Lin, Zeng Guangming, Zhang Jiachao, Peng Bo, Xie Xia, Lai Cui, Long Beiqing, Zhu Jingjing

机构信息

College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.

Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China.

出版信息

Nanomaterials (Basel). 2016 Jan 4;6(1):7. doi: 10.3390/nano6010007.

The fabrication and evaluation of a glassy carbon electrode (GCE) modified with self-doped polyaniline nanofibers (SPAN)/mesoporous carbon nitride (MCN) and bismuth for simultaneous determination of trace Cd and Pb by square wave anodic stripping voltammetry (SWASV) are presented here. The morphology properties of SPAN and MCN were characterized by transmission electron microscopy (TEM), and the electrochemical properties of the fabricated electrode were characterized by cyclic voltammetry (CV). Experimental parameters, such as deposition time, pulse potential, step potential, bismuth concentration and NaCl concentration, were optimized. Under the optimum conditions, the fabricated electrode exhibited linear calibration curves ranging from 5 to 80 nM for Cd and Pb. The limits of detection (LOD) were 0.7 nM for Cd and 0.2 nM for Pb (S/N = 3). Additionally, the repeatability, reproducibility, anti-interference ability and application were also investigated, and the proposed electrode exhibited excellent performance. The proposed method could be extended for other heavy metal determination.

本文介绍了一种用自掺杂聚苯胺纳米纤维（SPAN）/介孔氮化碳（MCN）和铋修饰的玻碳电极（GCE）的制备及其通过方波阳极溶出伏安法（SWASV）同时测定痕量镉和铅的评估。通过透射电子显微镜（TEM）对SPAN和MCN的形貌特性进行了表征，并用循环伏安法（CV）对制备电极的电化学特性进行了表征。对沉积时间、脉冲电位、步长电位、铋浓度和氯化钠浓度等实验参数进行了优化。在最佳条件下，制备的电极对镉和铅的线性校准曲线范围为5至80 nM。镉的检测限（LOD）为0.7 nM，铅的检测限为0.2 nM（S/N = 3）。此外，还研究了该电极的重复性、再现性、抗干扰能力和应用，该电极表现出优异的性能。所提出的方法可扩展用于其他重金属的测定。