Facile synthesis and morphology control of graphene oxide/polyaniline nanocomposites via in-situ polymerization process
Facile synthesis and morphology control of graphene oxide/polyaniline nanocomposites via in-situ polymerization process
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DOI：
10.1016/j.polymer.2012.04.022
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发表时间：
2012-06-07
期刊：
影响因子：
4.6
通讯作者：
Lin, C. W.
中科院分区：
文献类型：
--
作者：
Huang, Y. F.;Lin, C. W.
本研究以氧化石墨烯(GO)为模板，通过原位聚合制备了形貌可控的氧化石墨烯(GO)/聚苯胺(PANI)纳米复合材料。特定的反应参数，包括溶液酸度、苯胺浓度和反应温度，被用来控制复合产品的最终形状。用扫描电子显微镜(SEM)和透射电子显微镜(TEM)观察了复合材料的形貌。热重分析(TGA)、X射线衍射仪(X射线衍射仪)。用FT-IR和UV-Vis光谱仪对GO/PANI复合材料的中间体和最终产物进行了表征。实验结果表明，在低酸度和低温条件下，聚合反应倾向于形成GO/PANI纳米管。另一方面，在高酸度下操作的聚合倾向于形成纳米球或取向的纳米纤维阵列。这些不同的形貌是由不同的聚合途径造成的，并探讨了这些不同形状的纳米复合材料的形成机理。在各种纳米复合材料中，GO/PANI纳米球表现出最高的电化学比表面积。本研究为控制具有独特电化学性质的GO/PANI纳米复合材料的形态提供了一种简便有效的策略。(C)2012爱思唯尔有限公司。保留所有权利。
This study reports the synthesis of graphene oxide (GO)/polyaniline (PANI) nanocomposites with controllable morphologies through in-situ polymerization of aniline monomers in the presence of GO sheets. Specific reaction parameters including solution acidity, aniline concentration, and reaction temperature are used to control the final shape of the composite product. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images are used to explore the morphology of the composite. Thermogravimetric analysis (TGA), X-ray diffraction (XRD). FT-IR and UV-vis spectrophotometers are utilized to characterize the intermediates and the final products of the GO/PANI composites. Experiment results reveal that the polymerization operated in low acidity and low temperature conditions inclines to form GO/PANI nanotubes. On the other hand, the polymerization operated in high acidity inclines to form either nanospheres or aligned nanofiber arrays. These different morphologies are resulted from different polymerization routes and the formation mechanisms of these different shapes of nanocomposites are explored. Among the various nanocomposites, the GO/PANI nanospheres exhibit a highest electrochemical surface area. This study provides a facile and effective strategy to control the morphology of GO/PANI nanocomposites with characteristic electrochemical property. (c) 2012 Elsevier Ltd. All rights reserved.