Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, PR China.
Nanoscale. 2011 Apr;3(4):1446-50. doi: 10.1039/c0nr00776e. Epub 2011 Feb 7.
We describe a facile approach to controllable assembly of monodisperse Fe(3)O(4) nanoparticles (NPs) on chemically reduced graphene oxide (rGO). First, reduction and functionalization of GO by polyetheylenimine (PEI) were achieved simultaneously by simply heating the PEI and GO mixture at 60 °C for 12 h. The process is environmentally friendly and convenient compared with previously reported methods. Meso-2,3-dimercaptosuccinnic acid (DMSA)-modified Fe(3)O(4) NPs were then conjugated to the PEI moiety which is located on the periphery of the GO sheets via formation of amide bonds between COOH groups of DMSA molecules bound on the surface of the Fe(3)O(4) NPs and amine groups of PEI. The magnetic GO composites were characterized by means of TEM, AFM, UV-vis, FTIR, Raman, TGA, and VSM measurements. Finally, preliminary results of using the Fe(3)O(4)-rGO composites for efficient removal of tetracycline, an antibiotic that is often found as a contaminant in the environment, are reported.
我们描述了一种简便的方法，可控制单分散 Fe(3)O(4)纳米粒子 (NPs) 在化学还原氧化石墨烯 (rGO) 上的组装。首先，通过简单地将聚乙烯亚胺 (PEI) 和 GO 混合物在 60°C 下加热 12 小时，同时实现了 GO 的还原和功能化。与以前报道的方法相比，该过程具有环保和方便的优点。然后，介孔-2,3-二巯基丁二酸 (DMSA) 修饰的 Fe(3)O(4) NPs 通过表面结合的 DMSA 分子的 COOH 基团与 PEI 分子的胺基团之间形成酰胺键，接枝到位于 GO 片层边缘的 PEI 部分上。通过 TEM、AFM、UV-vis、FTIR、Raman、TGA 和 VSM 测量对磁性 GO 复合材料进行了表征。最后，报道了使用 Fe(3)O(4)-rGO 复合材料有效去除环境中常见污染物抗生素四环素的初步结果。
