Graphitization of highly porous carbons derived from poly(p-phenylene benzobisoxazole)

被引：34

作者：

Beatriz Vazquez-Santos, M. ^{[1
]}

Geissler, Erik ^{[2
]}

Laszlo, Krisztina ^{[3
]}

Rouzaud, Jean-Noel ^{[4
]}

Martinez-Alonso, Amelia ^{[1
]}

Tascon, Juan M. D. ^{[1
]}

机构：

[1] INCAR CSIC, Inst Nacl Carbon, Oviedo 33080, Spain

[2] Univ J Fourier Grenoble, Lab Interdisciplinaire Phys UMR 5588, F-38042 St Martin Dheres, France

[3] Budapest Univ Technol & Econ, Dept Phys Chem & Mat Sci, H-1521 Budapest, Hungary

[4] UMR CNRS 8538, Ecole Normale Super, Geol Lab, F-75321 Paris 5, France

来源：

CARBON | 2012年 / 50卷 / 08期

关键词：

ORDERED MESOPOROUS CARBONS; X-RAY-SCATTERING; RAMAN MICROPROBE; SURFACE-AREA; MICROTEXTURE; 1ST-ORDER; FIBERS; ORIGIN; CHARS; BAND;

D O I：

10.1016/j.carbon.2012.02.062

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We studied the development of graphitization in carbonaceous materials derived from poly(p-phenylene benzobisoxazole) (PBO) pre-activated with carbon dioxide to burn-off degrees of 15 and 51 wt.%. The activated materials were subsequently heat-treated at various temperatures comprised between 1600 and 2700 degrees C. The changes in porous texture, structure and nanostructure were characterized by gas adsorption analysis, X-ray diffraction, Raman spectroscopy and high-resolution transmission electron microscopy. The two sets of materials pre-activated to different degrees of burn-off exhibited similar changes as a function of the heat treatment temperature. Quite unexpectedly, the presence of porosity generated by physical activation of PBO chars does not affect their graphitizability. The materials seem to retain a sufficiently large degree of the order acquired during the spinning of the PBO fibres to allow the remaining bi-periodic structural units to re-arrange, allowing subsequent graphitization. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：2929 / 2940

页数：12

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