Simultaneous determination of Cd2+ and Pb2+ by an electrochemical sensor based on Fe3O4/Bi2O3/C3N4 nanocomposites

Yuwen Pu; Yalin Wu; Zhihui Yu; Liping Lu; Xiayan Wang

Talanta Open (Aug 2021)

Simultaneous determination of Cd2+ and Pb2+ by an electrochemical sensor based on Fe3O4/Bi2O3/C3N4 nanocomposites

Yuwen Pu,
Yalin Wu,
Zhihui Yu,
Liping Lu,
Xiayan Wang

Affiliations

Yuwen Pu: Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China; Division of Environment and Life, Beijing University of Technology, Beijing 100124, China
Yalin Wu: Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China; Division of Environment and Life, Beijing University of Technology, Beijing 100124, China
Zhihui Yu: Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China; Division of Environment and Life, Beijing University of Technology, Beijing 100124, China
Liping Lu: Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China; Division of Environment and Life, Beijing University of Technology, Beijing 100124, China; Corresponding authors at: Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China.
Xiayan Wang: Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China; Division of Environment and Life, Beijing University of Technology, Beijing 100124, China; Corresponding authors at: Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China.

Journal volume & issue: Vol. 3
p. 100024

Abstract

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The high adsorption capacity of Fe3O4 and C3N4 for heavy metals and the amalgam effect of Bi2O3 were exploited using a Fe3O4/Bi2O3/C3N4-modified glassy carbon electrode (GCE) for the determination of Cd2+ and Pb2+. The electrochemical response performance of the Fe3O4/Bi2O3/C3N4/GCE was studied by square-wave anodic stripping voltammetry. The electrochemical conditions were optimized, including the pH of the buffer solution, content of Fe3O4/Bi2O3/C3N4 on the electrode surface, deposition potential and deposition time. Under optimum conditions, the Fe3O4/Bi2O3/C3N4/GCE sensor shows a linear response from 0.01 μmol/L to 3 μmol/L. The minimum detectable quantity for Cd2+ and Pb2+ are 3 × 10−9 mol/L and 1 × 10−9 mol/L, respectively. Interference studies were carried out. The sensitivity of the Fe3O4/Bi2O3/C3N4/GCE sensor to Cd2+and Pb2+ does not significantly change in the presence of coexisting heavy metal ions. The Fe3O4/Bi2O3/C3N4/GCE sensor exhibits good stability and repeatability. The Fe3O4/Bi2O3/C3N4/GCE sensor was used to detect Cd2+and Pb2+ in river water samples to demonstrate its real-world application.

Published in Talanta Open

ISSN: 2666-8319 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry: Analytical chemistry
Website: https://www.journals.elsevier.com/talanta-open

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