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Tailoring properties of reduced graphene oxide by oxygen plasma treatment

Lookup NU author(s): Izabela Kondratowicz, Samet Şahin, Dr Eileen Yu

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


Abstract

© 2018 We report an easily controllable, eco-friendly method for tailoring the properties of reduced graphene oxide (rGO) by means of oxygen plasma. The effect of oxygen plasma treatment time (1, 5 and 10 min) on the surface properties of rGO was evaluated. Physicochemical characterization using microscopic, spectroscopic and thermal techniques was performed. The results revealed that different oxygen-containing groups (e.g. carboxyl, hydroxyl) were introduced on the rGO surface enhancing its wettability. Furthermore, upon longer treatment time, other functionalities were created (e.g. quinones, lactones). Moreover, external surface of rGO was partially etched resulting in an increase of the material surface area and porosity. Finally, the oxygen plasma-treated rGO electrodes with bilirubin oxidase were tested for oxygen reduction reaction. The study showed that rGO treated for 10 min exhibited twofold higher current density than untreated rGO. The oxygen plasma treatment may improve the enzyme adsorption on rGO electrodes by introduction of oxygen moieties and increasing the porosity.


Publication metadata

Author(s): Kondratowicz I, Nadolska M, Sahin S, Lapinski M, Przesniak-Welenc M, Sawczak M, Yu EH, Sadowski W, Zelechowska K

Publication type: Article

Publication status: Published

Journal: Applied Surface Science

Year: 2018

Volume: 440

Pages: 651-659

Print publication date: 15/05/2018

Online publication date: 31/01/2018

Acceptance date: 19/01/2018

Date deposited: 21/02/2018

ISSN (print): 0169-4332

ISSN (electronic): 1873-5584

Publisher: Elsevier BV * North-Holland

URL: https://doi.org/10.1016/j.apsusc.2018.01.168

DOI: 10.1016/j.apsusc.2018.01.168


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