Determination of Cd2+and Pb2+Based on Mesoporous Carbon Nitride/Self-Doped Polyaniline Nanofibers and Square Wave Anodic Stripping Voltammetry.
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.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. zhangchang@hnu.edu.cn.|Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China. zhangchang@hnu.edu.cn.
Chang
C
Zhang
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. iluenjor@163.com.|Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China. iluenjor@163.com.
Yaoyu
Y
Zhou
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. tanglin@hnu.edu.cn.|Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China. tanglin@hnu.edu.cn.
Lin
L
Tang
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. zgming@hnu.edu.cn.|Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China. zgming@hnu.edu.cn.
Guangming
G
Zeng
College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China. jiachao.zhang@163.com.
Jiachao
J
Zhang
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. pengbo_hnu@163.com.|Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China. pengbo_hnu@163.com.
Bo
B
Peng
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. xxialmf@163.com.|Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China. xxialmf@163.com.
Xia
X
Xie
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. laicui@hnu.edu.cn.|Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China. laicui@hnu.edu.cn.
Cui
C
Lai
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. longbeiqing@126.com.|Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China. longbeiqing@126.com.
Beiqing
B
Long
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. metzelsuppe@163.com.|Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China. metzelsuppe@163.com.
Jingjing
J
Zhu
electrochemistry; heavy metals; mesoporous carbon nitride; polyaniline; sensor