高等学校化学学报2012，Vol.33Issue(1)：107-113,7.DOI:10.3969/j.issn.0251-0790.2012.01.018
羧基化核壳磁性纳米Fe3O4吸附剂的制备及对Cu2+吸附性能
Synthesis of Carboxyl-functionalized Silica Coated Fe3O4Magnetic Nanoparticles and Their Adsorption Ability of Cu2+
摘要
Abstract
Carboxyl-functionalized Fe3O4 magnetic nanoparticles(CMNP) with core-shell structure were prepared by modifying silica coated Fe3O4 magentic nanoparticles( MNP) , which were successfully prepared by co-precipitation method, with 3-aminopropyltriethoxysilane( APTES) and Succinic anhydride. The morphology, structure, chemical composition and magnetic characteristics of the CMNP were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray energy dispersive spectroscopy ( EDS), vibrating sample magnetometer ( VSM), thermal gravimetric analysis ( TGA ) and Fourier-transformed infrared spectroscopy (FTIR). Moreover, the adsorption properties of the CMNP for the removal of Cu2+ in aqueous solution were investigated and various factors affecting the absorption behavior of Cu2+ such as initial pH value, initial concentration of Cu2+ and contact time were studied. The TEM results show that the average partical size of CMNP is 15 nra. Magnetic measurement reveals it is nearly superparamagnetic with a saturation magnetization of 41. 84 A · M2/kg. Adsorption equilibrium was achieved rapidly in 10 min and adsorption data of CMNP fitted well with the Langmuir isotherm model with the maximum adsorption capacity of 43. 48 mg/g, the maximum uptake of Cu2+ was recorded at pH = 7.关键词
共沉淀/磁性纳米Fe3O4粒子/铜离子/吸附Key words
Co-precipitation method/ Fe,O4 magentic nanoparticles/ Cu2+/ Adsorption分类
化学化工引用本文复制引用
郑群雄,刘煌,徐小强,杜美霞..羧基化核壳磁性纳米Fe3O4吸附剂的制备及对Cu2+吸附性能[J].高等学校化学学报,2012,33(1):107-113,7.基金项目
国家自然科学基金(批准号:30800916)、浙江工商大学校青年人才基金和研究生科技创新项目(批准号:1110XJ1510101)资助. （批准号:30800916）
