Surface characteristics of modified carbon nanotubes and its application in lead adsorption from aqueous solution

Surface characteristics of modified carbon nanotubes and its application in lead adsorption from aqueous solution
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改性碳纳米管的表面特性及其在水溶液中吸附铅中的应用

DOI:
10.1007/bf03183246
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发表时间:
2003-03
影响因子:
--
通讯作者:
XU Cailu
XU Cailu
中科院分区:
--
文献类型:
--
作者:
WANG Shuguang;Li Yanhui;ZHAOHuazhang;LUAN Zhaokun*;XU Cailu

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采用硝酸氧化法对碳纳米管(CNT)进行了表面改性。红外光谱(IR)分析表明,修饰后的碳纳米管表面引入了羟基(-OH)和羰基(-C=O)官能团。Micrometrics ASAP 2000测量表明,改性后的CNT的表面积略有增加。此外,还研究了Pb 2+在改性碳纳米管表面的吸附行为。结果表明,改性后的碳纳米管对Pb 2+具有良好的吸附性能。在实验温度下,吸附等温线符合Langmuir方程,动力学水平为3级。
Carbon nanotubes (CNT) were modified by nitric acid oxidation. Infrared spectroscopy (IR) demonstrated that hydroxyl (-OH) and carbonyl (-C=O) functional groups were introduced to the surface of modified CNT. Micrometrics ASAP 2000 measurement showed that the surface area of modified CNT was slightly increased. Furthermore, the Pb2+ adsorption behavior on the surface of modified CNT has been investigated. The results indicate that the modified CNT has an exceptional adsorption capability for Pb2+ removal. The adsorption isotherms are well described by the Langmuir equation under test temperatures and the kinetics level is three.
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