Home > Articles > Published articles > Enhanced electrochemical response of carbon quantum dot modified electrodes |
Date: | 2018 |
Abstract: | A glassy carbon electrode (GCE) was surface-modified with carbon quantum dots (CQDs) and applied for the effective enhancement of the electrochemical signal for dopamine and uric acid determination. CQDs were prepared from graphite by a green modification of the Hummers method. They were characterized by FTIR-ATR, XPS, solid-state NMR, fluorescence and Raman spectroscopies. TPD-MS analysis was applied to characterize the functionalization of the surface. The CQDs were assembled on the glassy carbon electrode by adsorption because of the large number of carboxy groups on their surface warrants effective adsorption. The modified GCE exhibits a sensitivity that is almost 10 times better than of the bare GCE. The lower limits of detection are 1. 3 μM for uric acid and 2. 7 μM for dopamine. |
Grants: | Ministerio de Economía y Competitividad CTQ2015-68951-C3-3-R Ministerio de Economía y Competitividad CTM2014/56770-R Ministerio de Economía y Competitividad CTQ2013-41577-P |
Rights: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Language: | Anglès |
Document: | Article ; recerca ; Versió sotmesa a revisió |
Subject: | Carbon dot ; Modified electrode ; Nanomaterial ; Voltammetry |
Published in: | Talanta, Vol. 178 (Feb. 2018) , p. 679-685, ISSN 1873-3573 |
Preprint 25 p, 1.1 MB |