Fe_3O_4@MgO纳米复合材料的制备及其对Pb^(2+)的吸附性能  

Preparation of Fe_3O_4@MgO Nanocomposites and Their Adsorption Properties for Pb^(2+)

作　　者：黄瑞霞[1] 陈大鹏[1] 徐洋[2] 乔学亮[2] HUANG Ruixia CHEN Dapeng XU Yang QIAO Xueliang(The 712 Research Institute, CSIC, Wuhan 430064, China Huazhong University of Science and Technology, State Key Laboratory of Materials Processing and Die ＆Mould Technology, Wuhan 430074, China)

机构地区：[1]中国船舶重工集团公司第七一二研究所,湖北武汉430064 [2]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074

出　　处：《材料开发与应用》2017年第3期59-66,共8页Development and Application of Materials

摘　　要：采用两步化学沉淀法制备了Fe_3O_4@MgO纳米复合材料,研究了纳米复合材料对Pb^(2+)的吸附性能。结果表明,所制备的复合材料具有较高的顺磁性和稳定性,其饱和磁化强度为58.07 emu/g,初始氧化增重温度为125℃,对Pb^(2+)有较好的吸附能力,在50 min内可以达到吸附平衡,最大吸附量为711.5 mg/g,其吸附过程符合准二级动力学模型和Langmuir等温吸附模型。Fe3O4@MgO nanocomposites were prepared by two-step chemical precipitation method. The adsorption properties of nanocomposites for Pb^2＋ were investigated. The results show that the prepared composites have super paramagnetism and high stability,and the saturation magnetization and the initial temperature of oxidation are 58. 07emu/g and 125 ℃,respectively. The as-obtained composites have excellent adsorption performance for Pb^2＋ with the maximum adsorption capacity of 711. 5 mg/g,and the adsorption equilibrium can be reached within 50 min. The adsorption process well followed the pseudo-second-order kinetic model and Langmuir isotherm model.

关 键 词：Fe3O4@MgO 纳米复合材料 磁性材料 吸附性能 

分 类 号：TB383[一般工业技术—材料科学与工程] X703[环境科学与工程—环境工程]