Formation of crosslinked-fullerene-like framework as negative replica of zeolite Y
Formation of crosslinked-fullerene-like framework as negative replica of zeolite Y
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DOI：
10.1016/j.carbon.2013.06.033
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发表时间：
2013-10-01
期刊：
影响因子：
10.9
通讯作者：
Kyotani, Takashi
中科院分区：
文献类型：
--
作者：
Nueangnoraj, Khanin;Nishihara, Hirotomo;Kyotani, Takashi
在这项工作中，我们报告了基于石墨烯的三维有序结构的形成，可以被认为是一种新的碳同素异形体，并作为富勒烯，碳纳米管和石墨烯的类似物质。通过脉冲化学气相沉积技术，将大量的碳引入无机晶体（Y型沸石）的纳米通道中，随后的化学蚀刻产生碳作为无机晶体的负复制品。由此获得的碳具有独特的框架，由三维有序排列的石墨烯基建筑单元组成，平均分子式为C63H4.9O1.2。波长色散软x射线发射光谱揭示了它与任何传统sp(2)基碳材料不同的价电子结构，与富勒烯C-60相似。分析结果表明，该碳中存在一种类似富勒烯的交联骨架。这种框架接近碳schwarzite（三维石墨烯基框架），这是一种尚未合成的假设材料。这种新材料具有独特的价电子结构，有望具有特殊的物理性质。(C) 2013 Elsevier Ltd.版权所有。
In this work, we report the formation of a three-dimensional graphene-based ordered architecture that can be considered as a new carbon allotrope, and as an analogical substance of fullerenes, carbon nanotubes, and graphenes. Significantly large amount of carbon is introduced into the confined nanochannels of inorganic crystal (zeolite Y) by a pulsed chemical vapor-deposition technique, and the subsequent chemical etching produces a carbon as a negative replica of the inorganic crystal. The carbon thus obtained has a unique framework consisting of a three-dimensional ordered array of graphene-based building units with the average molecular formula of C63H4.9O1.2. A wavelength-dispersive soft-X-ray emission spectroscopy reveals its distinct valence electron structure from any conventional sp(2)-based carbon materials, having similarities to that of fullerene C-60. The analysis results suggest the presence of a crosslinked-fullerene-like framework in this carbon. Such a framework is close to carbon schwarzite (a three-dimensional graphene-based framework), which is an as-yet-unsynthesized hypothetic material. The present new material is expected to have specific physical properties, as suggested by its unique valence electron structure. (C) 2013 Elsevier Ltd. All rights reserved.