苯酚及取代酚在碳纳米管上的吸附研究  

Studies on adsorption of phenol and substituted phenols on carbon nanotubes

作　　者：孙明礼[1] 成荣明[1] 徐学诚[1] 陈奕卫[1] 李茂刚[1] 

机构地区：[1]华东师范大学纳米功能材料与器件应用研究中心,上海200062

出　　处：《化学研究与应用》2006年第1期13-16,共4页Chemical Research and Application

基　　金：上海纳米科技专项基金资助项目(0252nm011)

摘　　要：本文研究了水溶液中碳纳米管(CNTs)吸附苯酚、对甲酚和对甲氧基苯酚的热力学特性,测定了不同温度下的吸附等温线,并探讨了其可能的吸附机理。结果表明:在稀溶液中碳纳米管对三种酚类物质的吸附均符合Freund lich和Langmu ir方程,吸附均为放热、熵增的自发过程,并且都具有物理吸附特征;碳纳米管与三种酚类物质分子之间的л—л共轭作用的强弱决定了碳纳米管对三种酚类物质的吸附能力,顺序依次为:对甲氧基苯酚>对甲酚>苯酚。The thermodynamics properties and mechanism of sorption process were studied for adsorpting phenol, p - cresol and p - methoxyphenol in aqueous solution with carbon nanotubes （CNTs） and the adsorption isotherms at different temperstures were determined. The results showed that the adsorption of the three phenolic compounds in aqueous solution accorded with Freundlich and Langmuir equations. The adsorrption for the three phenolic compounds on CNTs proved to be a spontaneous, exothermal process with increasing entropy and was physical adsorption. Because of different π-π conjugative effect between CNTs and three phenolic compounds, the adsorptive capacity of CNTs for them was p - methoxyphenol 〉 p - cresol 〉 phenol.

关 键 词：碳纳米管 酚类物质 吸附等温线 热力学 π-π共轭 

分 类 号：O647.3[理学—物理化学]