2026-05-04T09:30:38Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/103042025-03-12T01:05:33Zcom_10259_5822com_10259_5086com_10259_2604col_10259_5823
Repositorio Institucional de la Universidad de Burgos
author
Ruiz Fernández, Virginia
author
Yate, Luis
author
García, Ignacio
author
Cabañero, Germán
author
Grande, Hans J.
2025-03-11T07:55:13Z
2025-03-11T07:55:13Z
2017-05
0008-6223
http://hdl.handle.net/10259/10304
10.1016/j.carbon.2017.01.090
The antioxidant activity of graphene quantum dots (GQD) with different chemical composition and sp2-hybridized carbon content has been evaluated and compared to that of a standard antioxidant, ascorbic acid. GQD were prepared by top down and bottom up synthetic approaches from three different precursors (carbon black, glucose and pyrene) in order to vary significantly the chemical composition, electron density and sp2-hybridized carbon content. For a given radical, the three types of GQD exhibited very different radical scavenging activity (RSA). Moreover, the RSA varied with the type of free radical and reactive oxygen species (ROS) tested, indicating different radical inhibition mechanisms. Overall, GQD with strong hydrogen donor behavior and large content of sp2–hybridized carbon domains were the most effective radical scavengers. Thus, highly graphitic GQD with abundant edge functional groups produced from pyrene exhibited an extraordinary high antioxidant activity, with inhibition effective concentrations much lower than those of ascorbic acid. The great potential of highly antioxidant GQD as protective films against organic dye decoloration by ROS was demonstrated with two model target molecules, methylene blue and rhodamine B.
spa
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Tuning the antioxidant activity of graphene quantum dots: Protective nanomaterials against dye decoloration
info:eu-repo/semantics/article
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URL
https://riubu.ubu.es/bitstream/10259/10304/1/Ruiz-carbon_2017.pdf
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Ruiz-carbon_2017.pdf
URL
https://riubu.ubu.es/bitstream/10259/10304/2/Ruiz-carbon_2017_Supporting_Information.pdf
File
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Ruiz-carbon_2017_Supporting_Information.pdf