Back to Search
Start Over
ZnO@graphene nanocomposite modified electrode for sensitive and simultaneous detection of Cd (II) and Pb (II).
- Source :
-
Synthetic Metals . Nov2018, Vol. 245, p251-259. 9p. - Publication Year :
- 2018
-
Abstract
- Graphical abstract Highlights • ZnO@G was synthesized using a facile room-temperature method through colloidal coagulation effect. • ZnO@G nanocomposite modified electrode significantly improved the electrochemical sensitivity for Cd2+ and Pb2+ detection in the presence of Bi3+ using anodic stripping voltammetry. • This system was successfully applied for the simultaneous determination of Cd2+ and Pb2+ in real wastewater samples. Abstract Zinc Oxide (ZnO) nanorods were synthesized by using zinc acetate as a precursor via thermal decomposition method and then used to prepare ZnO@G nanocomposite by facile room-temperature approach using a colloidal coagulation effect. The as prepared ZnO@G nanocomposite was applied to modify the working electrode surface in an electrochemical sensor of Cd2+ and Pb2+for the first time. The morphologies of ZnO and ZnO@G nanocomposite were characterized by transmission electron microscopy, that exhibits the nanorod shape with an average diameter of 89 ± 18 nm, uniformly dispersed and intercalated between each G layer. Furthermore, the important factors affecting on the sensor sensitivity, including ZnO@G ratio, ZnO@G concentration, Bi3+ concentration and electrochemical parameters were systematically investigated using square-wave anodic stripping voltammetry. Under the optimal conditions, a linear range was found to be 10–200 μg L−1 and the detection limits were 0.6 and 0.8 μg L-1 for Cd2+ and Pb2+, respectively. Eventually, it was successfully used for the simultaneous detection of Cd2+ and Pb2+ in real wastewater samples and the results corresponded well with a standard inductively coupled plasma-optical emission spectroscopy. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ZINC oxide
*GRAPHENE
*NANOCOMPOSITE materials
*ELECTRODES
*CADMIUM
*LEAD
Subjects
Details
- Language :
- English
- ISSN :
- 03796779
- Volume :
- 245
- Database :
- Academic Search Index
- Journal :
- Synthetic Metals
- Publication Type :
- Academic Journal
- Accession number :
- 133115597
- Full Text :
- https://doi.org/10.1016/j.synthmet.2018.09.012