Back to Search
Start Over
Electrochemical detection of zinc oxide nanoparticles in water contamination analysis based on surface catalytic reactivity.
- Source :
-
Journal of Nanoparticle Research . May2020, Vol. 22 Issue 5, p1-11. 11p. - Publication Year :
- 2020
-
Abstract
- An electroanalytical method for determining the concentration of ZnO nanoparticles (< 50 nm) in aqueous dispersion has been developed. The nanoparticles are first allowed to coat a screen-printed electrode by air-drying, which provides a significant magnification of the reduction current for KCl electrolyte at negative potentials. Phenol is next added as a chemical probe for electrochemical analysis by cyclic voltammetry. Measurement of the reduction current at an applied potential of − 0.3 V provides adequate sensitivity for the indirect quantification of ZnO nanoparticles down to a low concentration of 0.1 mg/mL. Other nanoparticles such as TiO2 and CeO2 do not produce any similar reduction peak. Furthermore, the irreversible oxidation peak at + 0.6 V and the charge storage capacity are both linearly proportional to ZnO concentrations (below 0.2 mg/mL) and can afford a detection limit of 0.01 mg/mL nanoparticles. Hence, the new method comprising three simultaneous measurements is good for both the identification and quantification of ZnO nanoparticles. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13880764
- Volume :
- 22
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Journal of Nanoparticle Research
- Publication Type :
- Academic Journal
- Accession number :
- 143521156
- Full Text :
- https://doi.org/10.1007/s11051-020-04823-9