共 25 条
Surface modification and characterisation of a coal-based activated carbon
被引:650
作者:
Chingombe, P
[1
]
Saha, B
[1
]
Wakeman, RJ
[1
]
机构:
[1] Univ Loughborough, Dept Chem Engn, Adv Separat Technol Grp, Loughborough LE11 3TU, Leics, England
来源:
关键词:
activated carbon;
chemical treatment;
heat treatments;
surface oxygen complexes;
characterisation;
D O I:
10.1016/j.carbon.2005.06.021
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:
Surface modification of a coal-based activated carbon (F400) was performed using thermal and chemical methods. Nitric acid oxidation of the conventional sample produced samples with weakly acidic functional groups and the Presence of Such groups was confirmed by Fourier transform infra red (FTIR) spectroscopy, pH titration, zeta potential measurements and sodium uptake capacity results. There was a significant loss in microporosity of the oxidised samples which was caused by humic Substances that were formed as a by-product during the oxidation process. Thermal treatment produced a carbon with some basic character while amination of the thermally treated carbon gave a sample containing some amino (NH2) groups and these groups were detected by X-ray photoelectron spectroscopy (XPS) analysis. (C) 2005 Elsevier Ltd. All rights reserved.
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页码:3132 / 3143
页数:12
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