Electrodeposition of zinc oxide nanoparticles on multiwalled carbon nanotube-modified electrode for determination of caffeine in wastewater effluent
We report on the development of an electrochemical sensor based on electrodepositing zinc oxide on multiwalled carbon nanotube-modified glassy carbon electrode for the detection of caffeine in pharmaceutical wastewater effluents. The measurements were carried out using cyclic voltammetry, electroche...
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| Format: | Article |
| Language: | English |
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Taylor & Francis
2018
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| Online Access: | https://www.tandfonline.com/doi/abs/10.1080/03067319.2017.1337898 http://hdl.handle.net/11408/3394 |
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| author | Muzvidziwa, Takunda Moyo, Mambo Okonkow, Jonathan O. Shumba, Munyaradzi Nharingo, Tichaona Guyo, Upenyu |
| author_facet | Muzvidziwa, Takunda Moyo, Mambo Okonkow, Jonathan O. Shumba, Munyaradzi Nharingo, Tichaona Guyo, Upenyu |
| author_sort | Muzvidziwa, Takunda |
| collection | DSpace |
| description | We report on the development of an electrochemical sensor based on electrodepositing zinc oxide on multiwalled carbon nanotube-modified glassy carbon electrode for the detection of caffeine in pharmaceutical wastewater effluents. The measurements were carried out using cyclic voltammetry, electrochemical impedance spectroscopy, chronoamperometry and differential pulse voltammetry (DPV). DPV measurements showed a linear relationship between oxidation peak current and concentration of caffeine in 0.1 M HClO4 (pH 1.0) over the concentration range 0.00388–4.85 mg/L and a detection limit of 0.00194 mg/L. The diffusion coefficient and Langmuir adsorption constant for caffeine were calculated to be 3.25 × 10−6 cm2 s−1 and 1.10 × 103 M−1, respectively. The sensor showed satisfactory results when applied to the detection of caffeine in wastewater effluents. |
| format | Article |
| id | ir-11408-3394 |
| institution | My University |
| language | English |
| publishDate | 2018 |
| publisher | Taylor & Francis |
| record_format | dspace |
| spelling | ir-11408-33942022-10-15T20:33:24Z Electrodeposition of zinc oxide nanoparticles on multiwalled carbon nanotube-modified electrode for determination of caffeine in wastewater effluent Muzvidziwa, Takunda Moyo, Mambo Okonkow, Jonathan O. Shumba, Munyaradzi Nharingo, Tichaona Guyo, Upenyu Caffeine Carbon nanotubes Zinc oxide Voltammetry Wastewater effluent We report on the development of an electrochemical sensor based on electrodepositing zinc oxide on multiwalled carbon nanotube-modified glassy carbon electrode for the detection of caffeine in pharmaceutical wastewater effluents. The measurements were carried out using cyclic voltammetry, electrochemical impedance spectroscopy, chronoamperometry and differential pulse voltammetry (DPV). DPV measurements showed a linear relationship between oxidation peak current and concentration of caffeine in 0.1 M HClO4 (pH 1.0) over the concentration range 0.00388–4.85 mg/L and a detection limit of 0.00194 mg/L. The diffusion coefficient and Langmuir adsorption constant for caffeine were calculated to be 3.25 × 10−6 cm2 s−1 and 1.10 × 103 M−1, respectively. The sensor showed satisfactory results when applied to the detection of caffeine in wastewater effluents. 2018-12-03T10:45:53Z 2018-12-03T10:45:53Z 2017 Article 0306-7319 https://www.tandfonline.com/doi/abs/10.1080/03067319.2017.1337898 http://hdl.handle.net/11408/3394 en International Journal of Environmental Analytical Chemistry;Vol. 97, No. 7: p. 623-636 open Taylor & Francis |
| spellingShingle | Caffeine Carbon nanotubes Zinc oxide Voltammetry Wastewater effluent Muzvidziwa, Takunda Moyo, Mambo Okonkow, Jonathan O. Shumba, Munyaradzi Nharingo, Tichaona Guyo, Upenyu Electrodeposition of zinc oxide nanoparticles on multiwalled carbon nanotube-modified electrode for determination of caffeine in wastewater effluent |
| title | Electrodeposition of zinc oxide nanoparticles on multiwalled carbon nanotube-modified electrode for determination of caffeine in wastewater effluent |
| title_full | Electrodeposition of zinc oxide nanoparticles on multiwalled carbon nanotube-modified electrode for determination of caffeine in wastewater effluent |
| title_fullStr | Electrodeposition of zinc oxide nanoparticles on multiwalled carbon nanotube-modified electrode for determination of caffeine in wastewater effluent |
| title_full_unstemmed | Electrodeposition of zinc oxide nanoparticles on multiwalled carbon nanotube-modified electrode for determination of caffeine in wastewater effluent |
| title_short | Electrodeposition of zinc oxide nanoparticles on multiwalled carbon nanotube-modified electrode for determination of caffeine in wastewater effluent |
| title_sort | electrodeposition of zinc oxide nanoparticles on multiwalled carbon nanotube-modified electrode for determination of caffeine in wastewater effluent |
| topic | Caffeine Carbon nanotubes Zinc oxide Voltammetry Wastewater effluent |
| url | https://www.tandfonline.com/doi/abs/10.1080/03067319.2017.1337898 http://hdl.handle.net/11408/3394 |
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