Synthesis of sulfonated graphene/polyaniline composites with improved electroactivity
Synthesis of sulfonated graphene/polyaniline composites with improved electroactivity
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DOI：
10.1016/j.carbon.2012.01.041
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发表时间：
2012-05-01
期刊：
影响因子：
10.9
通讯作者：
Salavagione, Horacio J.
中科院分区：
文献类型：
--
作者：
Coskun, Elcin;Zaragoza-Contreras, Erasto A.;Salavagione, Horacio J.
研究了石墨烯与磺胺酸和氨基-4-羟基-2-萘磺酸重氮盐偶联的磺化反应。与NSA重氮盐偶联，磺化程度最高。在磺化石墨烯的存在下，通过苯胺聚合制备了聚苯胺（PANT）和磺化石墨烯（SG）复合材料。用拉曼光谱、傅里叶变换红外光谱、热重分析和循环伏安法对材料进行了表征。这些材料在pH值接近生理pH值时具有电化学活性，这是由于聚苯胺的掺杂和SG中的磺酸基被困在聚合物中。此外，还获得了良好的电导率值。(C) 2012 Elsevier Ltd.版权所有。
The sulfonation of graphene by coupling with the diazonium salts of sulfanilic (SA) acid and amino-4-hydroxy-2-naphthalenesulfonic (NSA) acid is studied. Coupling with the diazonium salt of NSA gives the highest degree of sulfonation. Composites of polyaniline (PANT) and sulfonated graphene (SG) are prepared by the polymerization of aniline in the presence of the SG. The materials have been characterized by Raman, Fourier transformed infrared spectroscopy, thermogravimetric analysis and cyclic voltammetry. These materials are electrochemically active at pHs close to physiological pH due to the doping of PANI with the sulfonic groups in SG trapped in the polymer. Furthermore, good conductivity values are obtained. (C) 2012 Elsevier Ltd. All rights reserved.