Surface modification and characterisation of a coal-based activated carbon
Surface modification and characterisation of a coal-based activated carbon
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DOI：
10.1016/j.carbon.2005.06.021
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发表时间：
2005-12-01
期刊：
影响因子：
10.9
通讯作者：
Wakeman, RJ
中科院分区：
文献类型：
--
作者：
Chingombe, P;Saha, B;Wakeman, RJ
采用热法和化学法对煤基活性炭（F400）进行了表面改性。通过傅里叶变换红外光谱（FTIR）、pH滴定、zeta电位测量和钠吸收容量结果证实，硝酸氧化后的样品具有弱酸性官能团。氧化样品的微孔隙度有显著损失，这是由氧化过程中形成的副产物腐殖质物质引起的。热处理后产生具有一定基本性质的碳，经胺化处理后得到含有氨基（NH2）基团的样品，并通过x射线光电子能谱（XPS）分析检测到这些基团。(C) 2005 Elsevier Ltd版权所有。
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.