Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, 230031 Hefei, PR China.
Carbohydr Polym. 2012 Oct 1;90(2):1100-5. doi: 10.1016/j.carbpol.2012.06.049. Epub 2012 Jun 23.
Herein, β-cyclodextrin (β-CD) was grafted onto magnetic MWCNT/iron oxide particles by using low temperature plasma-induced technique to synthesize a novel nanocomposite. The prepared composite (denoted as CD/MWCNT/iron oxide) exhibited high magnetic property (saturation magnetization M(s)=37.8 emu/g) and good dispersion property in aqueous solution. Batch experiments were conducted to evaluate the application potential of CD/MWCNT/iron oxide in the decontamination of Zn(II) from aqueous solutions. The sorption amount of Zn(II) on CD/MWCNT/iron oxide was higher than that of Zn(II) on MWCNT/iron oxides and oxidized MWCNTs, indicating that the grafted β-CD could enhance the sorption capacity of CD/MWCNT/iron oxide composite toward Zn(II) by providing multiple hydroxyl functional groups. Due to its high magnetic, CD/MWCNT/iron oxide could be easily separated from aqueous solution with an external magnetic field. Regeneration studies suggested that CD/MWCNT/iron oxide can support long term use as a cost-effective material in sewage treatment with minimum replacement costs.
在此，通过低温等离子体诱导技术，将β-环糊精（β-CD）接枝到磁性 MWCNT/氧化铁颗粒上，合成了一种新型纳米复合材料。所制备的复合材料（表示为 CD/MWCNT/氧化铁）表现出高磁性能（饱和磁化强度 M(s)=37.8 emu/g）和在水溶液中的良好分散性。进行了批量实验以评估 CD/MWCNT/氧化铁在从水溶液中去除 Zn(II)的应用潜力。CD/MWCNT/氧化铁对 Zn(II)的吸附量高于 MWCNT/氧化铁和氧化 MWCNTs 对 Zn(II)的吸附量，表明接枝的β-CD 可以通过提供多个羟基官能团来增强 CD/MWCNT/氧化铁复合材料对 Zn(II)的吸附能力。由于其高磁性能，CD/MWCNT/氧化铁可以很容易地用外部磁场从水溶液中分离出来。再生研究表明，CD/MWCNT/氧化铁可以作为一种具有成本效益的材料，在污水处理中支持长期使用，更换成本最低。
