Preparation and characterization of activated carbon from bamboo by microwave-induced phosphoric acid activation
Preparation and characterization of activated carbon from bamboo by microwave-induced phosphoric acid activation
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DOI：
10.1016/j.indcrop.2009.10.011
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发表时间：
2010-03-01
影响因子：
5.9
通讯作者：
Guo, Liang
中科院分区：
文献类型：
--
作者：
Liu, Qing-Song;Zheng, Tong;Guo, Liang
以磷酸为活化剂，采用微波活化法制备竹基活性炭。研究了微波功率、微波辐射时间、磷酸/炭比等因素对活化效果的影响。结果表明，在微波功率350 W、活化时间20 min、磷酸/炭比1：1的条件下，活化后的活性炭比表面积为1432 m2/g，活性炭产率为48%。采用酸碱滴定、pH（pzc）测定、FTIR光谱和XPS光谱等方法对表面化学性质进行了表征。结果表明，炭表面存在大量的酸性基团，并对这些基团的种类和相对含量进行了详细分析。与传统热法相比，微波活化法具有活化速度快、碳收率高的特点。(C)2009爱思唯尔有限公司版权所有。
Bamboo-based activated carbon was prepared with a microwave-induced activation process using phosphoric acid as the activating agent. The effects of various factors such as microwave power, radiation time and phosphoric acid/carbon ratio on the activation have been studied. The optimal activation conditions were determined as: microwave power 350W, radiation time 20 min and phosphoric acid/carbon ratio 1: 1, under which a surface area of 1432 m(2)/g and a carbon yield of 48% could be reached. The surface chemical properties were characterized with several methods including acid-base titration, point of zero charge (pH(pzc)) measurement, FTIR spectra and XPS spectra. The results demonstrated the existence of a large amount of acidic groups on the carbon surface, and the species and relative contents of these groups were analyzed in detail. Comparisons with the conventional thermal process demonstrated that the microwave-incluced activation process had faster activation rate and higher carbon yield. (C) 2009 Elsevier B.V. All rights reserved.