Enhanced electrochemical response of carbon quantum dot modified electrodes

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 mu M for uric acid and 2.7 mu M for dopamine.

Keywords:

Voltanunetry / Nanomaterial / Modified electrode / Carbon dot

Source:
Talanta, 2018, 178, 679-685

Publisher:

Elsevier, Amsterdam

Funding / projects:

Study of structure-function relationships in the plant cell wall and modifications of the wall structure by enzyme engineering (RS-173017)
ANPCYTANPCyT [PICT 2012-0151]
Univ. Buenos AiresUniversity of Buenos Aires [UBACyT 2013-2016/043BA]
CONICETConsejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET) [PIP 2014-2016/130]
Spanish MINECOSpanish Government [CTQ2013-41577-P, CTQ2015-68951-C3-3-R, CTM2014/56770-R]

DOI: 10.1016/j.talanta.2017.09.082

ISSN: 0039-9140

PubMed: 29136880

WoS: 000416615500090

Scopus: 2-s2.0-85032856402

[ Google Scholar ]



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TY  - JOUR
AU  - Algarra, Manuel
AU  - Gonzalez-Calabuig, A.
AU  - Radotić, Ksenija
AU  - Mutavdžić, Dragosav
AU  - Ania, C. O.
AU  - Lazaro-Martinez, Juan M.
AU  - Jimenez-Jimenez, Jose
AU  - Rodriguez-Castellon, Enrique
AU  - del, Valle, M.
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1127
AB  - 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 mu M for uric acid and 2.7 mu M for dopamine.
PB  - Elsevier, Amsterdam
T2  - Talanta
T1  - Enhanced electrochemical response of carbon quantum dot modified electrodes
EP  - 685
SP  - 679
VL  - 178
DO  - 10.1016/j.talanta.2017.09.082
ER  -

@article{
author = "Algarra, Manuel and Gonzalez-Calabuig, A. and Radotić, Ksenija and Mutavdžić, Dragosav and Ania, C. O. and Lazaro-Martinez, Juan M. and Jimenez-Jimenez, Jose and Rodriguez-Castellon, Enrique and del, Valle, M.",
year = "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 mu M for uric acid and 2.7 mu M for dopamine.",
publisher = "Elsevier, Amsterdam",
journal = "Talanta",
title = "Enhanced electrochemical response of carbon quantum dot modified electrodes",
pages = "685-679",
volume = "178",
doi = "10.1016/j.talanta.2017.09.082"
}

Algarra, M., Gonzalez-Calabuig, A., Radotić, K., Mutavdžić, D., Ania, C. O., Lazaro-Martinez, J. M., Jimenez-Jimenez, J., Rodriguez-Castellon, E.,& del, V. M.. (2018). Enhanced electrochemical response of carbon quantum dot modified electrodes. in Talanta
Elsevier, Amsterdam., 178, 679-685.
https://doi.org/10.1016/j.talanta.2017.09.082

Algarra M, Gonzalez-Calabuig A, Radotić K, Mutavdžić D, Ania CO, Lazaro-Martinez JM, Jimenez-Jimenez J, Rodriguez-Castellon E, del VM. Enhanced electrochemical response of carbon quantum dot modified electrodes. in Talanta. 2018;178:679-685.
doi:10.1016/j.talanta.2017.09.082 .

Algarra, Manuel, Gonzalez-Calabuig, A., Radotić, Ksenija, Mutavdžić, Dragosav, Ania, C. O., Lazaro-Martinez, Juan M., Jimenez-Jimenez, Jose, Rodriguez-Castellon, Enrique, del, Valle, M., "Enhanced electrochemical response of carbon quantum dot modified electrodes" in Talanta, 178 (2018):679-685,
https://doi.org/10.1016/j.talanta.2017.09.082 . .