College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gan Su, PR China; School of Pharmaceutical, Lanzhou University, Lanzhou 730000, Gan Su, PR China.
School of Pharmaceutical, Lanzhou University, Lanzhou 730000, Gan Su, PR China.
Int J Biol Macromol. 2014 Mar;64:233-9. doi: 10.1016/j.ijbiomac.2013.12.009. Epub 2013 Dec 12.
Fe3O4 nanoparticles were modified with Hydroxypropyl-β-cyclodextrin (HP-β-CD) and Polyethylene glycol 400 (PEG400) by a facile one-pot homogeneous precipitation method, and were used as a novel nano-adsorbent for the removal of congo red (CR) from aqueous solutions. The polymer-modified composites were characterized by FTIR, TEM, TGA, XRD and VSM, and showed excellent adsorption efficiency for CR. The value of the maximum adsorption capacity calculated according to the Langmuir isotherm model were 1.895g/g, which are much high and about 19 times that of Fe3O4 nanoparticles. Desorption study further indicates the good regeneration ability of the nanocomposites. The results suggest that the HP-β-CD/PEG400-modified Fe3O4 nanoparticles is a promising adsorbent for CR removal from aqueous solutions, and it is easily recycled owing to its large specific surface area and unique magnetic responsiveness.
四氧化三铁纳米粒子通过简便的一锅均相沉淀法用羟丙基-β-环糊精（HP-β-CD）和聚乙二醇 400（PEG400）进行修饰，并用作从水溶液中去除刚果红（CR）的新型纳米吸附剂。聚合物修饰的复合材料通过 FTIR、TEM、TGA、XRD 和 VSM 进行了表征，并对 CR 表现出优异的吸附效率。根据 Langmuir 等温线模型计算的最大吸附容量值为 1.895g/g，远高于四氧化三铁纳米粒子，约为其 19 倍。解吸研究进一步表明了纳米复合材料良好的再生能力。结果表明，HP-β-CD/PEG400 修饰的四氧化三铁纳米粒子是一种很有前途的从水溶液中去除 CR 的吸附剂，由于其大的比表面积和独特的磁响应性，它很容易回收。
