Electrocatalytic detection of l-cysteine using molybdenum POM doped-HKUST-1 metal organic frameworks
Glass carbon electrodes (GCE) were modified with metal organic frameworks (MOFs) containing molybdenum polyoxometallates (Mo POMs) in a copper benzene tricarboxylate framework (HKUST-1). The Mo POMs were introduced via one-pot synthesis (Mo2) and post-synthetic modification (Mo1) techniques. The ele...
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| Language: | English |
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Taylor & Francis
2022
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| Online Access: | https://doi.org/10.1080/00958972.2021.1907573 http://hdl.handle.net/11408/4707 |
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| author | Murinzi, Tafadzwa W. Watkins, Gareth M. Shumba, Munyaradzi Nyokong, Tebello |
| author_facet | Murinzi, Tafadzwa W. Watkins, Gareth M. Shumba, Munyaradzi Nyokong, Tebello |
| author_sort | Murinzi, Tafadzwa W. |
| collection | DSpace |
| description | Glass carbon electrodes (GCE) were modified with metal organic frameworks (MOFs) containing molybdenum polyoxometallates (Mo POMs) in a copper benzene tricarboxylate framework (HKUST-1). The Mo POMs were introduced via one-pot synthesis (Mo2) and post-synthetic modification (Mo1) techniques. The electrode modifiers were characterized by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermal analysis. The modified electrodes’ oxidation capacity toward l-cysteine was studied. Mo POMs significantly improved electron transfer kinetics compared to the bare GCE. The best Mo POM doped electrode (Mo1-GCE) had a catalytic rate constant of 2.2 × 104 M−1 s−1 and a limit of detection of 3.07 × 10−7 M. Under the employed experimental conditions, the detection response for l-cysteine was very fast (within 0.1 s) for all the modified electrodes and selective toward l-cysteine in the presence of other amino acids. |
| format | Article |
| id | ir-11408-4707 |
| institution | My University |
| language | English |
| publishDate | 2022 |
| publisher | Taylor & Francis |
| record_format | dspace |
| spelling | ir-11408-47072022-06-27T13:49:06Z Electrocatalytic detection of l-cysteine using molybdenum POM doped-HKUST-1 metal organic frameworks Murinzi, Tafadzwa W. Watkins, Gareth M. Shumba, Munyaradzi Nyokong, Tebello Glass carbon electrodes Metal organic frameworks Glass carbon electrodes (GCE) were modified with metal organic frameworks (MOFs) containing molybdenum polyoxometallates (Mo POMs) in a copper benzene tricarboxylate framework (HKUST-1). The Mo POMs were introduced via one-pot synthesis (Mo2) and post-synthetic modification (Mo1) techniques. The electrode modifiers were characterized by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermal analysis. The modified electrodes’ oxidation capacity toward l-cysteine was studied. Mo POMs significantly improved electron transfer kinetics compared to the bare GCE. The best Mo POM doped electrode (Mo1-GCE) had a catalytic rate constant of 2.2 × 104 M−1 s−1 and a limit of detection of 3.07 × 10−7 M. Under the employed experimental conditions, the detection response for l-cysteine was very fast (within 0.1 s) for all the modified electrodes and selective toward l-cysteine in the presence of other amino acids. 2022-03-17T09:17:48Z 2022-03-17T09:17:48Z 2021 Article 0095-8972 1029-0389 https://doi.org/10.1080/00958972.2021.1907573 http://hdl.handle.net/11408/4707 en Journal of Coordination Chemistry;Vol. 74; No. 9-10: p. 1730-1748 open Taylor & Francis |
| spellingShingle | Glass carbon electrodes Metal organic frameworks Murinzi, Tafadzwa W. Watkins, Gareth M. Shumba, Munyaradzi Nyokong, Tebello Electrocatalytic detection of l-cysteine using molybdenum POM doped-HKUST-1 metal organic frameworks |
| title | Electrocatalytic detection of l-cysteine using molybdenum POM doped-HKUST-1 metal organic frameworks |
| title_full | Electrocatalytic detection of l-cysteine using molybdenum POM doped-HKUST-1 metal organic frameworks |
| title_fullStr | Electrocatalytic detection of l-cysteine using molybdenum POM doped-HKUST-1 metal organic frameworks |
| title_full_unstemmed | Electrocatalytic detection of l-cysteine using molybdenum POM doped-HKUST-1 metal organic frameworks |
| title_short | Electrocatalytic detection of l-cysteine using molybdenum POM doped-HKUST-1 metal organic frameworks |
| title_sort | electrocatalytic detection of l-cysteine using molybdenum pom doped-hkust-1 metal organic frameworks |
| topic | Glass carbon electrodes Metal organic frameworks |
| url | https://doi.org/10.1080/00958972.2021.1907573 http://hdl.handle.net/11408/4707 |
| work_keys_str_mv | AT murinzitafadzwaw electrocatalyticdetectionoflcysteineusingmolybdenumpomdopedhkust1metalorganicframeworks AT watkinsgarethm electrocatalyticdetectionoflcysteineusingmolybdenumpomdopedhkust1metalorganicframeworks AT shumbamunyaradzi electrocatalyticdetectionoflcysteineusingmolybdenumpomdopedhkust1metalorganicframeworks AT nyokongtebello electrocatalyticdetectionoflcysteineusingmolybdenumpomdopedhkust1metalorganicframeworks |