Nanoscale fine-tuning of porosity of carbide-derived carbon prepared from molybdenum carbide

被引：134

作者：

Jaenes, Alar ^{[1
]}

Thomberg, Thomas ^{[1
]}

Kurig, Heisi ^{[1
]}

Lust, Enn ^{[1
]}

机构：

[1] Univ Tartu, Inst Chem, EE-51014 Tartu, Estonia

来源：

CARBON | 2009年 / 47卷 / 01期

关键词：

X-RAY-DIFFRACTION; NANOPOROUS CARBON; ELECTROCHEMICAL CHARACTERISTICS; RAMAN-SPECTROSCOPY; GRAPHITE; CAPACITANCE; ADSORPTION; SCATTERING; DISORDER; SIZE;

D O I：

10.1016/j.carbon.2008.07.010

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：

Micro- and mesoporous carbide-derived carbon (CDC) was synthesised from molybdenum carbide (Mo2C) powder by gas phase chlorination in the temperature range from 400 to 1200 degrees C. Analysis of XRD results show that C(Mo2C), chlorinated at 1200 degrees C, consist mainly on graphitic crystallites of mean size, L-a = 9 nm and L-c = 7.5 nm. The first-order Raman spectra showed the graphite-like absorption peak at similar to 1587 cm(-1) and the disorder-induced (D) peak at similar to 1348 cm(-1). The low-temperature N-2 adsorption experiments were performed and a specific surface area up to 1855 m(2) g(-1) and total pore volume up to 1.399 cm(3) g(-1) were obtained. Sorption measurements showed the presence of both micro- and mesopores after chlorination at 400-900 degrees C and only mesopores after chlorination at 1000 degrees-1200 degrees C. Stepwise formation of micro- and mesopores was achieved and the peak pore size can be shifted from 0.8 nm up to 4 nm by increasing the chlorination temperature. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：23 / 29

页数：7

共 26 条

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