氧化石墨烯基薄膜的制备及其分离性能的研究

Preparation of Graphene Oxide-Based Membrane and Investigation on Its Separation Performance

通过真空抽滤的方法成功制备了氧化石墨烯/多壁碳纳米管复合薄膜,采用扫描电子显微镜、X射线衍射仪等多种手段对氧化石墨烯基薄膜进行了表征,并研究了氧化石墨烯和多壁碳纳米管的最佳质量比,及其对有机溶剂中染料的分离性能。结果表明:多壁碳纳米管的负载量为氧化石墨烯的15 ω%时获得的复合薄膜的过滤性能最佳,其水分子渗透速率为2 L/m2hbar,并对以罗丹明B为代表的分子染料表现出98%的优异截留性能。同时该膜对不同有机溶剂中的染料分子均表现出95%以上优异的截留性能,并实现了对有机溶剂的回收。

The graphene oxide/multi-walled carbon nanotube membrane was successfully prepared by vac-uum filtration. The membrane was characterized by scanning electron microscopy and X-ray dif-fraction analysis. The optimal mass ratio of graphene oxide to multi-walled carbon nanotube and the separation performance of the membrane for dyes in organic solvents were also studied. The result shows that when the loading of multi-walled carbon nanotubes is at 15 ω%, the membrane’s separation performance is the best. Its water flux is 2 L/m2hbar. And it also shows 98% rejection rate for rhodamine B as the representative of the molecular dyes. At the same time, the membrane has an excellent retention performance of more than 95% for dye molecules in different organic solutions, and realizes the recovery of organic solvents.