An electrochemical sensing platform based on a reduced graphene oxide-cobalt oxide nanocube@platinum nanocomposite for nitric oxide detection
We report a facile one-pot hydrothermal synthesis of a reduced graphene oxide–cobalt oxide nanocube@platinum (rGO–Co3O4@Pt) nanocomposite and its application toward the electrochemical detection of nitric oxide (NO). The rGO–Co3O4@Pt nanocomposite was characterized by field emission scanning electro...
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Royal Society of Chemistry
2015
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Online Access: | http://psasir.upm.edu.my/id/eprint/43712/1/An%20electrochemical%20sensing%20platform%20based%20on%20a.pdf http://psasir.upm.edu.my/id/eprint/43712/ http://pubs.rsc.org/en/content/articlepdf/2015/ta/c5ta02608c |
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my.upm.eprints.437122016-08-10T01:37:28Z http://psasir.upm.edu.my/id/eprint/43712/ An electrochemical sensing platform based on a reduced graphene oxide-cobalt oxide nanocube@platinum nanocomposite for nitric oxide detection Shahid, Muhammad Mehmood Rameshkumar, Perumal Pandikumar, Alagarsamy Hong, Ngee Lim Yun, Hau Ng Nay, Ming Huang We report a facile one-pot hydrothermal synthesis of a reduced graphene oxide–cobalt oxide nanocube@platinum (rGO–Co3O4@Pt) nanocomposite and its application toward the electrochemical detection of nitric oxide (NO). The rGO–Co3O4@Pt nanocomposite was characterized by field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) mapping, X-ray diffraction (XRD) and Raman analyses. The nanocomposite modified glassy carbon (GC) electrode was used for the electrochemical oxidation of nitric oxide (NO) and it showed better catalytic performance in terms of catalytic peak current and shift in overpotential when compared to those of rGO, Co3O4 nanocubes and rGO–Co3O4 nanocomposite modified electrodes. The rGO–Co3O4@Pt nanocomposite modified electrode showed a better sensing ability toward the in situ generated NO in NO2− containing phosphate buffer solution (PBS) than the other controlled modified electrodes. The Pt nanoparticles present in the nanocomposite could enhance the sensing performance and the limit of detection (LOD) was found to be 1.73 μM with a signal-to-noise (S/N) ratio of ∼3 using the amperometric i–t curve technique. Furthermore, the nanocomposite modified electrode showed selectivity toward the detection of NO in the presence of a 100-fold higher concentration of other physiologically important analytes. The proposed sensor was stable, reproducible and selective toward the detection of NO. Royal Society of Chemistry 2015 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/43712/1/An%20electrochemical%20sensing%20platform%20based%20on%20a.pdf Shahid, Muhammad Mehmood and Rameshkumar, Perumal and Pandikumar, Alagarsamy and Hong, Ngee Lim and Yun, Hau Ng and Nay, Ming Huang (2015) An electrochemical sensing platform based on a reduced graphene oxide-cobalt oxide nanocube@platinum nanocomposite for nitric oxide detection. Journal of Materials Chemistry A, 3 (6). pp. 14458-14468. ISSN 2050-7488; ESSN: 2050-7496 http://pubs.rsc.org/en/content/articlepdf/2015/ta/c5ta02608c 10.1039/C5TA02608C |
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We report a facile one-pot hydrothermal synthesis of a reduced graphene oxide–cobalt oxide nanocube@platinum (rGO–Co3O4@Pt) nanocomposite and its application toward the electrochemical detection of nitric oxide (NO). The rGO–Co3O4@Pt nanocomposite was characterized by field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) mapping, X-ray diffraction (XRD) and Raman analyses. The nanocomposite modified glassy carbon (GC) electrode was used for the electrochemical oxidation of nitric oxide (NO) and it showed better catalytic performance in terms of catalytic peak current and shift in overpotential when compared to those of rGO, Co3O4 nanocubes and rGO–Co3O4 nanocomposite modified electrodes. The rGO–Co3O4@Pt nanocomposite modified electrode showed a better sensing ability toward the in situ generated NO in NO2− containing phosphate buffer solution (PBS) than the other controlled modified electrodes. The Pt nanoparticles present in the nanocomposite could enhance the sensing performance and the limit of detection (LOD) was found to be 1.73 μM with a signal-to-noise (S/N) ratio of ∼3 using the amperometric i–t curve technique. Furthermore, the nanocomposite modified electrode showed selectivity toward the detection of NO in the presence of a 100-fold higher concentration of other physiologically important analytes. The proposed sensor was stable, reproducible and selective toward the detection of NO. |
format |
Article |
author |
Shahid, Muhammad Mehmood Rameshkumar, Perumal Pandikumar, Alagarsamy Hong, Ngee Lim Yun, Hau Ng Nay, Ming Huang |
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Shahid, Muhammad Mehmood Rameshkumar, Perumal Pandikumar, Alagarsamy Hong, Ngee Lim Yun, Hau Ng Nay, Ming Huang An electrochemical sensing platform based on a reduced graphene oxide-cobalt oxide nanocube@platinum nanocomposite for nitric oxide detection |
author_facet |
Shahid, Muhammad Mehmood Rameshkumar, Perumal Pandikumar, Alagarsamy Hong, Ngee Lim Yun, Hau Ng Nay, Ming Huang |
author_sort |
Shahid, Muhammad Mehmood |
title |
An electrochemical sensing platform based on a reduced graphene oxide-cobalt oxide nanocube@platinum nanocomposite for nitric oxide detection |
title_short |
An electrochemical sensing platform based on a reduced graphene oxide-cobalt oxide nanocube@platinum nanocomposite for nitric oxide detection |
title_full |
An electrochemical sensing platform based on a reduced graphene oxide-cobalt oxide nanocube@platinum nanocomposite for nitric oxide detection |
title_fullStr |
An electrochemical sensing platform based on a reduced graphene oxide-cobalt oxide nanocube@platinum nanocomposite for nitric oxide detection |
title_full_unstemmed |
An electrochemical sensing platform based on a reduced graphene oxide-cobalt oxide nanocube@platinum nanocomposite for nitric oxide detection |
title_sort |
electrochemical sensing platform based on a reduced graphene oxide-cobalt oxide nanocube@platinum nanocomposite for nitric oxide detection |
publisher |
Royal Society of Chemistry |
publishDate |
2015 |
url |
http://psasir.upm.edu.my/id/eprint/43712/1/An%20electrochemical%20sensing%20platform%20based%20on%20a.pdf http://psasir.upm.edu.my/id/eprint/43712/ http://pubs.rsc.org/en/content/articlepdf/2015/ta/c5ta02608c |
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