Voltammetric detection of potassium ferricyanide mediated by multi walled carbon nanotube titanium dioxide composite modified glassy carbon electrode.
The MWCNT/TiO2 composite was homogeneously coated on the surface of GCE and applied in the electrochemical determination of 0.1 mM potassium ferricyanide in 0.1 M Na2HPO4 (pH 8.5). The redox couple of potassium ferricyanide with current enhancements of 3.0-3.1 folds was obtained using the MWCNT/TiO2...
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| Format: | Article |
| Language: | English |
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Electrochemical Science Group
2011
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| Online Access: | http://psasir.upm.edu.my/id/eprint/24773/ http://psasir.upm.edu.my/id/eprint/24773/1/Voltammetric%20detection%20of%20potassium%20ferricyanide%20mediated%20by%20multi%20walled%20carbon%20nanotube%20titanium%20dioxide%20composite%20modified%20glassy%20carbon%20electrode.pdf |
| _version_ | 1848845127834927104 |
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| author | Perenlei, Ganchimeg Tan, Wee Tee Yusof, Nor Azah Goh, Joo Kheng |
| author_facet | Perenlei, Ganchimeg Tan, Wee Tee Yusof, Nor Azah Goh, Joo Kheng |
| author_sort | Perenlei, Ganchimeg |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The MWCNT/TiO2 composite was homogeneously coated on the surface of GCE and applied in the electrochemical determination of 0.1 mM potassium ferricyanide in 0.1 M Na2HPO4 (pH 8.5). The redox couple of potassium ferricyanide with current enhancements of 3.0-3.1 folds was obtained using the MWCNT/TiO2/GCE when compared with unmodified GCE. A linear calibration plot showed a
correlation coefficient of 0.999, with detection limits of 48.6 μM (100 mV/s scan rate) and 1.1 μM (5 mV/s scan rate) in the concentration ranges of 0.01-0.2 mM of potassium ferricyanide. High sensitivity responses of 77.6 µA/mM
for the anodic and of 68.9 µA/mM for the cathodic peak currents were also obtained with an excellent correlation coefficient of 0.999. Based on plot of peak current against peak potential, the zero-current potentials were obtained as =209 mV and =189 mV. Diffusion coefficient was found as 1.52x10-5cm 2/s from chronocoulometry study. The effect of temperature study was carried at 10 oC – 80oC and activation energy obtained was 5.8-6 kJ/mol. The morphology of composite surface was examined by scanning electron microscopy.
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| first_indexed | 2025-11-15T08:41:53Z |
| format | Article |
| id | upm-24773 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T08:41:53Z |
| publishDate | 2011 |
| publisher | Electrochemical Science Group |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-247732015-10-28T08:59:49Z http://psasir.upm.edu.my/id/eprint/24773/ Voltammetric detection of potassium ferricyanide mediated by multi walled carbon nanotube titanium dioxide composite modified glassy carbon electrode. Perenlei, Ganchimeg Tan, Wee Tee Yusof, Nor Azah Goh, Joo Kheng The MWCNT/TiO2 composite was homogeneously coated on the surface of GCE and applied in the electrochemical determination of 0.1 mM potassium ferricyanide in 0.1 M Na2HPO4 (pH 8.5). The redox couple of potassium ferricyanide with current enhancements of 3.0-3.1 folds was obtained using the MWCNT/TiO2/GCE when compared with unmodified GCE. A linear calibration plot showed a correlation coefficient of 0.999, with detection limits of 48.6 μM (100 mV/s scan rate) and 1.1 μM (5 mV/s scan rate) in the concentration ranges of 0.01-0.2 mM of potassium ferricyanide. High sensitivity responses of 77.6 µA/mM for the anodic and of 68.9 µA/mM for the cathodic peak currents were also obtained with an excellent correlation coefficient of 0.999. Based on plot of peak current against peak potential, the zero-current potentials were obtained as =209 mV and =189 mV. Diffusion coefficient was found as 1.52x10-5cm 2/s from chronocoulometry study. The effect of temperature study was carried at 10 oC – 80oC and activation energy obtained was 5.8-6 kJ/mol. The morphology of composite surface was examined by scanning electron microscopy. Electrochemical Science Group 2011 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/24773/1/Voltammetric%20detection%20of%20potassium%20ferricyanide%20mediated%20by%20multi%20walled%20carbon%20nanotube%20titanium%20dioxide%20composite%20modified%20glassy%20carbon%20electrode.pdf Perenlei, Ganchimeg and Tan, Wee Tee and Yusof, Nor Azah and Goh, Joo Kheng (2011) Voltammetric detection of potassium ferricyanide mediated by multi walled carbon nanotube titanium dioxide composite modified glassy carbon electrode. International Journal of Electrochemical Science, 6 (2). pp. 520-531. ISSN 1452-3981 http://www.electrochemsci.org/ |
| spellingShingle | Perenlei, Ganchimeg Tan, Wee Tee Yusof, Nor Azah Goh, Joo Kheng Voltammetric detection of potassium ferricyanide mediated by multi walled carbon nanotube titanium dioxide composite modified glassy carbon electrode. |
| title | Voltammetric detection of potassium ferricyanide mediated by multi walled carbon nanotube titanium dioxide composite modified glassy carbon electrode. |
| title_full | Voltammetric detection of potassium ferricyanide mediated by multi walled carbon nanotube titanium dioxide composite modified glassy carbon electrode. |
| title_fullStr | Voltammetric detection of potassium ferricyanide mediated by multi walled carbon nanotube titanium dioxide composite modified glassy carbon electrode. |
| title_full_unstemmed | Voltammetric detection of potassium ferricyanide mediated by multi walled carbon nanotube titanium dioxide composite modified glassy carbon electrode. |
| title_short | Voltammetric detection of potassium ferricyanide mediated by multi walled carbon nanotube titanium dioxide composite modified glassy carbon electrode. |
| title_sort | voltammetric detection of potassium ferricyanide mediated by multi walled carbon nanotube titanium dioxide composite modified glassy carbon electrode. |
| url | http://psasir.upm.edu.my/id/eprint/24773/ http://psasir.upm.edu.my/id/eprint/24773/ http://psasir.upm.edu.my/id/eprint/24773/1/Voltammetric%20detection%20of%20potassium%20ferricyanide%20mediated%20by%20multi%20walled%20carbon%20nanotube%20titanium%20dioxide%20composite%20modified%20glassy%20carbon%20electrode.pdf |