Multiwall carbon nanotube modified by antimony oxide (Sb2O3/MWCNTs) paste electrode for the simultaneous electrochemical detection of cadmium and lead ions

Tran Le Hai, Ly Cam Hung, Tran Thi Bich Phuong, Bui Thi Thu Ha, Ba Son Nguyen, Tran Duy Hai, Van Huy Nguyen

研究成果: Article同行評審

11 引文 斯高帕斯(Scopus)

摘要

In this study, a sensitive and reliable anodic stripping voltammetry (ASV) using a series of multiwall carbon nanotube modified by antimony oxide (Sb2O3/MWCNTs) paste electrodes was successfully introduced for the simultaneous electrochemical detection of Cd2+ and Pb2+ ions. Firstly, a composite of multiwall carbon nanotubes (MWCNTs) was successfully used to preparing a paste electrode. Then, the MWCNTs bulk electrode was further modified with various concentrations of Sb2O3 (1, 3, and 4 wt.%, respectively) for improving the cadmium ions (Cd2+) and lead ions (Pb2+) detection ability. Among the Sb2O3/MWCNTs electrodes, the modified electrode by 3 wt.% Sb2O3 exhibits remarkable analytical detection for Cd2+ and Pb2+ by linear sweep anodic stripping voltammetry (LSASV) technique. The proper linear curves of current response versus the concentration of Cd2+ (80–150 ppb) and Pb2+ (5–35 ppb) could be observed. Interestingly, the analytical sensitivity of the mixture Cd2+ and Pb2+ were 1.932 and 2.694 μA⋅L⋅μg–1, respectively, which were higher than 1.5 and 1.3 folds of the individual ions. It expects that the Sb2O3/MWCNTs paste electrode could provide a significant improvement to the electrode for the simultaneous electrochemical detection of Cd2+ and Pb2+ ions.

原文English
文章編號104456
期刊Microchemical Journal
153
DOIs
出版狀態Published - 2020 三月

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Spectroscopy

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