中文摘要：

通过催化裂解法制备多壁碳纳米管,利用不同化学试剂对多壁碳纳米管改性,研究了不同化学改性对多壁碳纳米管表面物理化学特性的影响和Cr3＋的吸附特性。结果表明,所制备的多壁碳纳米管孔隙均匀,外径为30～50 nm,长度为0.5～2μm,经过不同化学改性表面有效地引入了含氧基团。未改性、H2SO4、HNO3、H2SO4-HNO3改性碳纳米管对Cr3＋的吸附动力学均符合Langergren模型;吸附等温线均符合Freundlich模型。温度和pH升高均有利于改性多壁碳纳米管对Cr3＋的吸附。

英文摘要：

Using catalytic splitting decomposition method,multiwalled carbon nanotubes（MWCNTs） were prepared and followed by modification via different chemical reagents.The physicochemical properties and adsorption properties of Cr3＋ on MWCNTs modified by different chemical methods were investigated.The porosity of MWCNTs was uniform.The outside diameter and length were 30~50 nm and 0.5~2 μm,respectively.Large amount of oxygenous functional groups was introduced onto the surface of MWCNTs by chemical modification.The adsorption kinetics curves of Cr3＋ on unmodified MWCNTs and the MWCNTs modified by H2SO4,HNO3 or H2SO4-HNO3 could be well correlated by Langergren kinetic adsorption model.Their adsorption isotherms for Cr3＋ could be well correlated by Freundlich model.Increase of both temperature and pH value were helpful for Cr3＋ adsorption on chemical modified MWCNTs.