UV-Assisted Photoreduction of Graphene Oxide into Hydrogels: High-Rate Capacitive Performance in Supercapacitor

UV-Assisted Photoreduction of Graphene Oxide into Hydrogels: High-Rate Capacitive Performance in Supercapacitor
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紫外线辅助氧化石墨烯光还原成水凝胶:超级电容器的高速电容性能

DOI:
10.1021/jp508682g
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发表时间:
2014-11
期刊:
The Journal of Physical Chemistry C
影响因子:
--
通讯作者:
Shuping Zhuo
Shuping Zhuo
中科院分区:
其他
文献类型:
--
作者:
Ling-Bao Xing;Shu-Fen Hou;Jin Zhou;Shijiao Li;Tingting Zhu;Zhaohui Li;Weijiang Si;Shuping Zhuo

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将氧化石墨烯(GO)自组装成三维(3D)宏观结构是充分利用其固有性质并限制不可逆聚集体形成或重新堆叠成石墨结构的有效策略。在本工作中,我们首次报道了一种通过Hantzsch 1,4-二氢吡啶(HEH)光化学还原GO悬浮液自组装制备3D光还原石墨烯水凝胶(PRGH)的光还原方法。通过X射线粉末衍射(XRD)、拉曼光谱、X射线光电子能谱(XPS)、元素分析和傅里叶变换红外光谱(FT-IR)证实了GO还原为PRGH。据观察,大部分的含氧基团可以有效地去除,和sp2样域恢复作为光还原过程的结果。采用场发射扫描电子显微镜(FESEM)、高分辨率扫描电子显微镜(SEM)、高分辨透射电子显微镜(TEM)、透射电子显微镜(TEM)和透射电子显微镜(TEM)等手段,对所得PRGH的三维分级多孔结构进行了深入研究。
Self-assembly of graphene oxide (GO) into three-dimensional (3D) macroscopic architectures is an efficient strategy to exploit their inherent properties fully and restrict the formation of irreversible aggregates or restack into graphitic structure. In the present work, we first report a photoreduction method for producing the 3D photoreduced graphene hydrogels (PRGHs) through self-assembly of GO suspension under photochemical reduction of Hantzsch 1,4-dihydropyridine (HEH). The reduction of GO into PRGHs was confirmed by X-ray powder diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), elemental analysis, and Fourier transform infrared spectroscopy (FT-IR). It is observed that most of the oxygenated groups could be efficiently removed, and the sp2-like domains are restored as a result of photoreduction process. The 3D hierarchically porous structures of the resulting PRGHs have been intensively investigated by field emission scanning electron microscopy (FESEM), high-resolution ...
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