Shahid, Muhammad Mehmood and Rameshkumar, Perumal and Numan, Arshid and Shahabuddin, Syed and Alizadeh, Mahdi and Khiew, Poi Sim and Chiu, Wee Siong (2019) A cobalt oxide nanocubes interleaved reduced graphene oxide nanocomposite modified glassy carbon electrode for amperometric detection of serotonin. Materials Science and Engineering: C, 100. pp. 388-395. ISSN 0928-4931, DOI https://doi.org/10.1016/j.msec.2019.02.107.
Full text not available from this repository.Abstract
Cobalt oxide nanocubes incorporated with reduced graphene oxide (rGO-Co 3 O 4 ) was prepared by using simple one-step hydrothermal route. Crystallinity and structural characteristics of the nanocomposite were analyzed and confirmed using X-ray diffraction (XRD) and Raman analysis, respectively. The cubical shape of the Co 3 O 4 nanostructures and the distribution of Co 3 O 4 nanocubes on the surface of rGO sheets were identified through field emission scanning electron microscopy (FESEM) and energy dispersive X-ray (EDX) mapping analysis, respectively. Raman spectra depicted the presence of D and G bands for GO and rGO with different I D /I G values and thus confirmed the reduction of GO into rGO. The electrochemical study reflects that the rGO-Co 3 O 4 nanocomposite shows good electrocatalytic activity in oxidation of depression biomarker serotonin (5-HT) in phosphate buffer (pH 7.2). The detection of 5-HT was carried out by using rGO-Co 3 O 4 nanocomposite modified glassy carbon electrode under dynamic condition using amperometry technique with a linear range of 1–10 μM. The limit of detection and limit of quantification were calculated and found to be 1.128 and 3.760 μM, respectively with a sensitivity value of 0.133 μΑ·μM −1 . The sensor showed selectivity in the presence of different interferent species such as ascorbic acid, dopamine and uric acid. © 2019 Elsevier B.V.
| Item Type: | Article |
|---|---|
| Funders: | UM Power Energy Dedicated Advanced Centre (UMPEDAC), ( RU007-2018 ) and the Higher Institution Centre of Excellence (HICoE), (MOHE HICOE - UMPEDAC), ( FP055-2016 , PR003-2016 ) under Ministry of Education Malaysia, Faculty Research Grant ( GPF043B-2018 ), High Impact Research Program ( UM.C/625/1/HIR/079 ) and HIR - MOHE ( UM.C/625/1/HIR/MOHE/SC/06 ), Southeast Asia Universities (SATU) Alliance Scheme (RU018M-2016), National Taipei University of Technology |
| Uncontrolled Keywords: | Cobalt oxide nanocubes; Reduced graphene oxide; Hydrothermal synthesis; Serotonin; Electrochemical sensor |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics |
| Divisions: | Faculty of Science > Department of Physics Deputy Vice Chancellor (Research & Innovation) Office > UM Power Energy Dedicated Advanced Centre |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 20 Jan 2020 04:20 |
| Last Modified: | 20 Jan 2020 04:20 |
| URI: | http://eprints.um.edu.my/id/eprint/23481 |
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