摘要
采用蒸发酸纯化多壁碳纳米管(MWCNTs),共沉淀法制备Fe_3O_4/MWCNTs磁性复合材料.通过傅里叶红外光谱(FTIR)、透射电镜(TEM)、X射线衍射(XRD)、X射线光电子能谱分析(XPS)和磁性能检测(VSM)对合成的Fe_3O_4/MWCNTs磁性复合材料组成、结构、形貌、性能等进行表征,并对溶液中的Pb^(2+)进行吸附研究.结果表明:Fe_3O_4纳米颗粒成功嫁接到多壁碳纳米管的表面;Fe_3O_4/MWCNTs磁性复合材料具有超顺磁性,饱和磁化强度为50.10A·m^(-2)/kg,剩磁和矫顽力为0,可通过磁铁将Fe_3O_4/MWCNTs磁性复合材料从溶液中分离出来;Fe_3O_4/MWCNTs磁性复合材料吸附溶液中的Pb^(2+),开始的15min内吸附量达到43.57mg/g,6h后吸附达到平衡,平衡吸附量为50.28mg/g.
Multi-walled carbon nanotubes （MWCNTs） were purified with vaporous acid and magnetic composite Fe3O4/（MWCNTs） was prepared with coprecipitation method. The conposition, structure, morphology and magnetic properties of the synthesized magnetic composite Fe3O4/MWCNTs were charac- terized with Fourier transform infrared spectroscopy （FTIR）, transmission electron microscopy （TEM）, X-ray diffraction （XRD）, vibrating sample magnetometry （VSM）, and X-ray photoelectron spectroscopy （XPS）. The adsorption of Pb2＋ in the solution was also investigated. The result showed that Fe3O4 nano- particles would be successfully grafted upon the surface of the MWCNTs. The magnetic composite would have superpara-magnetism and its saturation magnetization intensity was found to be 50. 10 A, m-2/kg, and there was no residual magnetism and coerctive force. The magnetic composite Fea O4/MWCNTs could be separated from the solution with the magnet. This material could adsorb Pb2＋ in solution and its adsorption capacity would reach 43. 57 mg/g in the first 15 min. The adsorption process would achieve ad- sorption equilibrium after 6 h and equilibrium absorption capacity was 50. 28 mg/g.
出处
《兰州理工大学学报》
CAS
北大核心
2016年第1期26-30,共5页
Journal of Lanzhou University of Technology
基金
国家自然科学基金(51304101)
关键词
磁性
碳纳米管
铅离子
吸附
magnetism
carbon nanotube
lead ion
absorption
