دورية أكاديمية
Electrochemical detection of zinc oxide nanoparticles in water contamination analysis based on surface catalytic reactivity
| العنوان: | Electrochemical detection of zinc oxide nanoparticles in water contamination analysis based on surface catalytic reactivity |
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| المؤلفون: | Zhang, W. (Wenyu), Lai, E.P.C. (Edward) |
| المصدر: | Journal of Nanoparticle Research vol. 22 no. 5 |
| سنة النشر: | 2020 |
| المجموعة: | Carleton University's Institutional Repository |
| مصطلحات موضوعية: | Coating, Cyclic voltammetry, Electrochemical detection, Environmental effects, Phenol, Water contamination analysis, Zinc oxide nanoparticles |
| الوصف: | 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. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | https://ir.library.carleton.ca/pub/26830Test |
| DOI: | 10.1007/s11051-020-04823-9 |
| الإتاحة: | https://doi.org/10.1007/s11051-020-04823-9Test https://ir.library.carleton.ca/pub/26830Test |
| رقم الانضمام: | edsbas.4377E509 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1007/s11051-020-04823-9 |
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