Electrochemical sensor based on single-walled carbon nanotube/ ZnO photocatalyst nanocomposite modified electrode for the determination of paracetamol
Electrodes modified with single-walled carbon nanotube/zinc oxide were prepared for electrochemical characterization and sensing of paracetamol. The modified electrodes were characterized using cyclic voltammetry, field emission scanning electron microscopy and energy dispersive X-ray spectroscopy....
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| Format: | Article |
| Language: | English |
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American Scientific Publishers
2016
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| Online Access: | http://psasir.upm.edu.my/id/eprint/54144/ http://psasir.upm.edu.my/id/eprint/54144/1/Electrochemical%20sensor%20based%20on%20single-walled%20carbon%20nanotube.pdf |
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| author | Ngai, Koh Sing Tan, Wee Tee Zainal, Zulkarnain Mohd Zawawi, Ruzniza Juan, Joon Ching |
| author_facet | Ngai, Koh Sing Tan, Wee Tee Zainal, Zulkarnain Mohd Zawawi, Ruzniza Juan, Joon Ching |
| author_sort | Ngai, Koh Sing |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Electrodes modified with single-walled carbon nanotube/zinc oxide were prepared for electrochemical characterization and sensing of paracetamol. The modified electrodes were characterized using cyclic voltammetry, field emission scanning electron microscopy and energy dispersive X-ray spectroscopy. The single-walled carbon nanotube/zinc oxide-modified glassy carbon electrode allowed an increased oxidative peak current of paracetamol with an enhancement factor of 4, in comparison to the bare electrode. Linear calibration plots of oxidative peak currents against paracetamol concentrations were obtained with a correlation coefficient as high as 0.994. The scan rate study suggested that the electrocatalytic processes were affected by both diffusion and adsorption processes. The effect of pH study indicated that the modified electrodes performed well under acidic conditions. The field emission scanning electron microscopy images showed the surface porosity of the composite with particle size increased after the electroanalysis. The energy dispersive X-ray analysis revealed the presence of carbon, zinc, and oxygen in the composite prior to electroanalysis, and additional phosphorus and potassium elements after electroanalysis. The analytic performance of this modified electrode was evaluated for the detection of paracetamol in commercial drugs with satisfactory results. Ultraviolet-visible spectrophotometry measurements were used to determine the band gap of single-walled carbon nanotube/zinc oxide nanocomposite. An unprecedented band gap of 3.11 eV was estimated. The proposed modified electrode exhibited better electrocatalytic activity in the determination of paracetamol. Potentially, the developed single-walled carbon nanotube/zinc oxide-modified glassy carbon electrode could be used for analytical applications. |
| first_indexed | 2025-11-15T10:38:30Z |
| format | Article |
| id | upm-54144 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T10:38:30Z |
| publishDate | 2016 |
| publisher | American Scientific Publishers |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-541442018-03-01T02:14:05Z http://psasir.upm.edu.my/id/eprint/54144/ Electrochemical sensor based on single-walled carbon nanotube/ ZnO photocatalyst nanocomposite modified electrode for the determination of paracetamol Ngai, Koh Sing Tan, Wee Tee Zainal, Zulkarnain Mohd Zawawi, Ruzniza Juan, Joon Ching Electrodes modified with single-walled carbon nanotube/zinc oxide were prepared for electrochemical characterization and sensing of paracetamol. The modified electrodes were characterized using cyclic voltammetry, field emission scanning electron microscopy and energy dispersive X-ray spectroscopy. The single-walled carbon nanotube/zinc oxide-modified glassy carbon electrode allowed an increased oxidative peak current of paracetamol with an enhancement factor of 4, in comparison to the bare electrode. Linear calibration plots of oxidative peak currents against paracetamol concentrations were obtained with a correlation coefficient as high as 0.994. The scan rate study suggested that the electrocatalytic processes were affected by both diffusion and adsorption processes. The effect of pH study indicated that the modified electrodes performed well under acidic conditions. The field emission scanning electron microscopy images showed the surface porosity of the composite with particle size increased after the electroanalysis. The energy dispersive X-ray analysis revealed the presence of carbon, zinc, and oxygen in the composite prior to electroanalysis, and additional phosphorus and potassium elements after electroanalysis. The analytic performance of this modified electrode was evaluated for the detection of paracetamol in commercial drugs with satisfactory results. Ultraviolet-visible spectrophotometry measurements were used to determine the band gap of single-walled carbon nanotube/zinc oxide nanocomposite. An unprecedented band gap of 3.11 eV was estimated. The proposed modified electrode exhibited better electrocatalytic activity in the determination of paracetamol. Potentially, the developed single-walled carbon nanotube/zinc oxide-modified glassy carbon electrode could be used for analytical applications. American Scientific Publishers 2016-04 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/54144/1/Electrochemical%20sensor%20based%20on%20single-walled%20carbon%20nanotube.pdf Ngai, Koh Sing and Tan, Wee Tee and Zainal, Zulkarnain and Mohd Zawawi, Ruzniza and Juan, Joon Ching (2016) Electrochemical sensor based on single-walled carbon nanotube/ ZnO photocatalyst nanocomposite modified electrode for the determination of paracetamol. Science of Advanced Materials, 8 (4). pp. 788-796. ISSN 1947-2935; ESSN: 1947-2943 http://www.ingentaconnect.com/content/asp/sam/2016/00000008/00000004/art00013?crawler=true&mimetype=application/pdf Carbon nanotubes; Cyclic voltammetry; Glassy carbon; Paracetamol; Zinc oxide 10.1166/sam.2016.2671 |
| spellingShingle | Carbon nanotubes; Cyclic voltammetry; Glassy carbon; Paracetamol; Zinc oxide Ngai, Koh Sing Tan, Wee Tee Zainal, Zulkarnain Mohd Zawawi, Ruzniza Juan, Joon Ching Electrochemical sensor based on single-walled carbon nanotube/ ZnO photocatalyst nanocomposite modified electrode for the determination of paracetamol |
| title | Electrochemical sensor based on single-walled carbon nanotube/ ZnO photocatalyst nanocomposite modified electrode for the determination of paracetamol |
| title_full | Electrochemical sensor based on single-walled carbon nanotube/ ZnO photocatalyst nanocomposite modified electrode for the determination of paracetamol |
| title_fullStr | Electrochemical sensor based on single-walled carbon nanotube/ ZnO photocatalyst nanocomposite modified electrode for the determination of paracetamol |
| title_full_unstemmed | Electrochemical sensor based on single-walled carbon nanotube/ ZnO photocatalyst nanocomposite modified electrode for the determination of paracetamol |
| title_short | Electrochemical sensor based on single-walled carbon nanotube/ ZnO photocatalyst nanocomposite modified electrode for the determination of paracetamol |
| title_sort | electrochemical sensor based on single-walled carbon nanotube/ zno photocatalyst nanocomposite modified electrode for the determination of paracetamol |
| topic | Carbon nanotubes; Cyclic voltammetry; Glassy carbon; Paracetamol; Zinc oxide |
| url | http://psasir.upm.edu.my/id/eprint/54144/ http://psasir.upm.edu.my/id/eprint/54144/ http://psasir.upm.edu.my/id/eprint/54144/ http://psasir.upm.edu.my/id/eprint/54144/1/Electrochemical%20sensor%20based%20on%20single-walled%20carbon%20nanotube.pdf |