无机材料学报 ›› 2014, Vol. 29 ›› Issue (7): 763-768.DOI: 10.3724/SP.J.1077.2014.13519 CSTR: 32189.14.SP.J.1077.2014.13519

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溶剂热法合成不同形貌MnFe2O4纳米颗粒及其在污水处理中的应用

段连峰1, 2, 张 雨2, 王立民1, 金松哲2, 吴 化2   

  1. (1. 中国科学院 长春应用化学研究所, 稀土资源利用国家重点实验室, 长春 130022; 2. 长春工业大学 材料科学与工程学院, 先进结构材料教育部重点实验室, 长春130012)
  • 收稿日期:2013-10-10 修回日期:2013-12-06 出版日期:2014-07-20 网络出版日期:2014-06-20
  • 基金资助:
    吉林省自然科学基金(201215118) Natural Science Foundation of Jilin Province(201215118)

Synthesis and Characterization of MnFe2O4 with Different Morphologies and Their Application in Water Treatment

DUAN Lian-Feng1,2, ZHANG Yu2, WANG Li-Min1, JIN Song-Zhe2, WU Hua2   

  1. (1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; 2. Key Laboratory of Advanced Structural Materials, Ministry of Education, and Department of Materials Science and Engineering, Changchun University of Technology, Changchun 130012, China)
  • Received:2013-10-10 Revised:2013-12-06 Published:2014-07-20 Online:2014-06-20

摘要:

通过简单溶剂热法合成表面粗糙的立方体结构MnFe2O4颗粒, 样品粒径约为150 nm, 立方体表面球状突起的直径约为10 nm, 该特征增加了样品的比表面积。反应过程中, 通过改变表面活性剂CTAB的加入量, 有效影响晶体各个晶面方向的生长速度, 最终合成不同形貌的样品(立方体、多面体、正八面体结构)。合成样品在室温下都表现出典型的铁磁性质。通过对刚果红和重金属离子CrVI和PbII溶液的吸附实验证明, 表面粗糙的立方体结构MnFe2O4颗粒在污水处理过程中, 可以更高效地去除水中的污染物, 通过磁分离技术回收样品以便再利用, 提高废水净化率。

关键词: 磁性材料, 晶体生长, 微观结构, 污水处理

Abstract:

Manganese ferrite (MnFe2O4) with rough surface was synthesized by a simple solvothermal method. The average diameter of particles was about 150 nm, and the tubes of rough surface about 10 nm. Here, magnetic MnFe2O4 particles with different morphologies (cube, polyhedron and octahedron) were successfully prepared by controlling CTAB concentration. Both of the samples with different morphologies exhibit ferromagnetic behavior at room temperature. The saturation magnetization (Ms) and coercivity (Hc) of MnFe2O4 with non-smooth surface are 58.7 Am2/kg and 6.23 kA/m, respectively. The particles with rough surface also show good performance in removal of pollutants like Congo red (92.4 mg/g), CrVI (54.4 mg/g), and PbII (84.4 mg/g) from waste water by adsorption experiments. Because the particles are recollected by magnetic separation, the waste water purification rate can be improved, which expands the applications of magnetic materials.

Key words: magnetic materials, crystal growth, microstructure, water treatment

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