Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, P.R. China.
J Phys Chem B. 2010 May 27;114(20):6779-85. doi: 10.1021/jp911424k.
The magnetic composite of beta-cyclodextrin grafted onto multiwalled carbon nanotubes/iron oxides (denoted as MWCNTs/iron oxides/CD) was synthesized using the plasma-induced grafting technique and was developed for the removal of inorganic and organic pollutants from aqueous solutions. The characteristic results of Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), powder X-ray diffraction (XRD), and thermogravimetric analysis (TGA) showed that beta-CD was grafted onto the MWCNTs/iron oxides. The grafted beta-CD on the MWCNTs/iron oxides contributed to an enhancement of the adsorption capacity because of the strong abilities of the multiple hydroxyl groups and the inner cores of the hydrophobic cavity in beta-CD to form complexes with metal ions and organic pollutants. MWCNTs/iron oxides/CD can be separated and recovered from solution by magnetic separation. The adsorption of Pb(II) on MWCNTs/iron oxides/CD was found to be dependent on pH, and the adsorption of 1-naphthol was found to be independent of pH. The results show that the magnetic composite of MWCNTs/iron oxides/CD is a promising composite material for the preconcentration and separation of inorganic and organic pollutants from aqueous solutions in environmental pollution cleanup.
采用等离子体诱导接枝技术合成了β-环糊精接枝到多壁碳纳米管/铁氧化物上的磁性复合材料（表示为 MWCNTs/iron oxides/CD），并将其开发用于从水溶液中去除无机和有机污染物。傅里叶变换红外（FT-IR）光谱、X 射线光电子能谱（XPS）、粉末 X 射线衍射（XRD）和热重分析（TGA）的特征结果表明，β-CD 已接枝到 MWCNTs/iron oxides 上。MWCNTs/iron oxides 上接枝的β-CD 由于其多个羟基和β-CD 疏水腔内部的内芯与金属离子和有机污染物形成配合物的能力很强，有助于提高吸附能力。MWCNTs/iron oxides/CD 可以通过磁分离从溶液中分离和回收。发现 Pb(II)在 MWCNTs/iron oxides/CD 上的吸附依赖于 pH，而 1-萘酚的吸附则独立于 pH。结果表明，MWCNTs/iron oxides/CD 磁性复合材料是一种很有前途的复合材料，可用于从环境污染清理中的水溶液中预浓缩和分离无机和有机污染物。
