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Open AccessFeature PaperArticle

Determination of Cd2+ and Pb2+ Based on Mesoporous Carbon Nitride/Self-Doped Polyaniline Nanofibers and Square Wave Anodic Stripping Voltammetry

by Chang Zhang 1,2, Yaoyu Zhou 1,2, Lin Tang 1,2,*, Guangming Zeng 1,2,*, Jiachao Zhang 3, Bo Peng 1,2, Xia Xie 1,2, Cui Lai 1,2, Beiqing Long 1,2 and Jingjing Zhu 1,2
1
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
2
Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China
3
College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Ming Su
Nanomaterials 2016, 6(1), 7; https://doi.org/10.3390/nano6010007
Received: 14 November 2015 / Revised: 13 December 2015 / Accepted: 24 December 2015 / Published: 4 January 2016
(This article belongs to the Special Issue Nanomaterials for Biosensing Applications)
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 Cd2+ and Pb2+ 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 Cd2+ and Pb2+. The limits of detection (LOD) were 0.7 nM for Cd2+ and 0.2 nM for Pb2+ (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. View Full-Text
Keywords: sensor; heavy metals; mesoporous carbon nitride; polyaniline; electrochemistry sensor; heavy metals; mesoporous carbon nitride; polyaniline; electrochemistry
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MDPI and ACS Style

Zhang, C.; Zhou, Y.; Tang, L.; Zeng, G.; Zhang, J.; Peng, B.; Xie, X.; Lai, C.; Long, B.; Zhu, J. Determination of Cd2+ and Pb2+ Based on Mesoporous Carbon Nitride/Self-Doped Polyaniline Nanofibers and Square Wave Anodic Stripping Voltammetry. Nanomaterials 2016, 6, 7.

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