Tailoring properties of reduced graphene oxide by oxygen plasma treatment
Tailoring properties of reduced graphene oxide by oxygen plasma treatment
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DOI：
10.1016/j.apsusc.2018.01.168
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发表时间：
2018-05-15
影响因子：
6.7
通讯作者：
Zelechowska, Kamila
中科院分区：
文献类型：
--
作者：
Kondratowicz, Izabela;Nadolska, Malgorzata;Zelechowska, Kamila
我们报道了一种易于控制的、环保的方法，通过氧等离子体来定制还原氧化石墨烯(RGO)的性质。考察了氧等离子体处理时间(1、5、10min)对rGO表面性质的影响。利用显微、光谱和热分析技术对其进行了物理化学表征。结果表明，在RGO表面引入了不同的含氧基团(如羧基、羟基)，提高了其润湿性。此外，在较长的处理时间后，创建了其他功能(例如，苯二酮、内酯)。此外，rGO的外表面被部分刻蚀，导致材料的比表面积和孔隙率增加。最后，对经氧等离子体处理的含有胆红素氧化酶的rGO电极进行了氧还原反应的测试。研究表明，处理10min的rGO的电流密度是未经处理的rGO的两倍。氧等离子体处理可以通过引入氧基团和增加孔隙率来改善酶在rGO电极上的吸附。(C)2018爱思唯尔B.V.保留所有权利。
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 micro-scopic, 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. (C) 2018 Elsevier B.V. All rights reserved.