Surface oxygen complexes as governors of neopentane sorption in multiwalled carbon nanotubes

被引：17

作者：

Ötvös, Z

Onyestyák, G

Hancz, A

Kiricsi, I

Rees, LVC

机构：

[1] Hungarian Acad Sci, Chem Res Ctr, Inst Catalysis & Surface Chem, H-1525 Budapest, Hungary

[2] Univ Szeged, Dept Solid State & Radiochem, H-6701 Szeged, Hungary

[3] Univ Szeged, Appl & Environm Chem Dept, H-6720 Szeged, Hungary

[4] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland

来源：

CARBON | 2006年 / 44卷 / 09期

基金：

匈牙利科学研究基金会;

关键词：

carbon nanotubes; temperature programmed desorption; surface oxygen complexes; adsorption properties;

D O I：

10.1016/j.carbon.2006.01.005

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：

Multiwalled carbon nanotube (MWCNT) samples were obtained by purification and ball-milling of a MWCNT sample synthesized by catalytic chemical vapor decomposition. These samples were oxidized with KMnO4-H2SO4 solution. A heat treatment was employed to decompose the oxygenated groups created by the oxidation treatment. The samples were characterized by transmission electron microscopy (TEM), adsorption of nitrogen, pore size distribution, and by thermogravimetric analysis combined with mass spectroscopy (TG-MS). The dynamics of 2,2-dimethyl-propane (neopentane) sorption was studied by frequency-response (FR) spectroscopy. The FR spectra obtained clearly demonstrate the effect of (a) the ball-milling, (b) the oxidative treatment and (c) the heat treatment on the sorption uptake processes involved in these treated samples. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1665 / 1672

页数：8

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