Work

Using Electrode Made of Carbon Nanotubes and Bismuth Oxide for the Determination of Metal Concentration by Anodic Stripping Voltammetry

Year: 2019

Type: article

Abstract: We have successfully manufactured a new electrode modified with bismuth oxide (Bi2O3) using carbon nanotubes (CNTs). The electrode was fabricated to detect cadmium (Cd), lead (Pb), and indium (In) by differential pulse anodic stripping voltammetry (DP-ASV). The electrode surface was studied by scanning electron microscopy (SEM), and the reduction and oxidation processes were studied by cyclic voltammetry (CV) techniques. Operational parameters such as electrode size, bismuth concentration, and electrolytic background were optimized. The DP-ASV method used fabricated electrodes with a linear response range from 1.5–20 μg·L−1with Cd(II) and Pb(II) and 2.5–20 μg·L−1with In(III); low detection limit (LOD) of 0.22 μg·L−1with Cd(II), 0.65 μg·L−1with In(III), and 0.26 μg·L−1with Pb(II); and good repeatability with relative standard deviations (RSD) of 2.65%, 2.51%, and 3.34% with Cd(II), Pb(II), and In(III), respectively (n = 8). The electrode can be used to test the content of Cd(II), In(III), and Pb(II) in water.

Source: Journal of Chemistry

DOI: 10.1155/2019/6170967

Authors: Thi Thu Phuong Nguyen, Xuan Gian Trinh, Dao Thi To Uyen

Institutions: Hanoi University of Industry, Viện Hóa học, Vietnam Academy of Science and Technology, Trường ĐH Nguyễn Tất Thành

Language: English

Topic: Electrochemical Analysis and Applications

Subfield: Electrochemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,160

Funder: Vietnam Academy of Science and Technology