Fe3O4/斜发沸石磁性复合材料的制备及其性能

doi:10.3724/SP.J.1077.2010.00401

摘要/Abstract

摘要： 采用化学共沉淀法制备Fe₃O₄磁流体,再与斜发沸石复合制备一系列不同Fe₃O₄载量的磁性斜发沸石,并进行X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、振动样品磁强计(VSM)等表征分析,测定了其磁分离回收率及Cu²⁺、Zn²⁺、Cd²⁺的饱和交换吸附量.结果表明,Fe₃O₄微粒赋存于斜发沸石表面或相互聚集,磁性斜发沸石磁稳定性好,并具有良好的超顺磁性,其对Cu²⁺、Zn²⁺、Cd²⁺的交换吸附性能与其所含斜发沸石相当,但随Fe₃O₄载量增加而降低.Fe₃O₄载量为25wt%时,其饱和磁化强度Ms、剩余磁化强度Mr分别为14.787和0.398A·m2/kg,磁分离回收率为94.6%,Cu²⁺、Zn²⁺、Cd²⁺的饱和交换吸附量分别为12.3、12.0和23.4mg/g.磁性斜发沸石经磁分离回收并放置于空气中100d后仍保持良好的超顺磁性和较高的磁分离回收率.

关键词: 磁性斜发沸石, 磁性能, 磁分离回收率, 饱和交换吸附量

Abstract: Magnetic fluid of Fe₃O₄ was prepared via chemical coprecipitation method firstly, and then magnetic clinoptilolite with different loadings of Fe₃O₄
were prepared by clinoptilolite composited with magnetic fluid. The compositions were characterized by Xray diffraction (XRD), scanning electronic microscope (SEM), transmission electronic microscope (TEM) and vibration sample magnetometer (VSM). The magnetic recovery rate and saturation exchangeadsorption capacity to Cu²⁺, Zn²⁺, and Cd²⁺ of magnetic clinoptilolite were also measured. The results show that Fe₃O₄ particles adhere to the surface of clinoptilolite particles or aggregate each other to magnetic particulate. Magnetic clinoptilolite is stable with good superparamagnetism. The saturation exchangedsorption capacity to Cu²⁺, Zn²⁺, and Cd²⁺ are approximate with containing clinoptilolite, but decrease slightly along with the loadings of Fe₃O₄ increasing. When the loadings of Fe₃O₄ is 25wt%, the saturation magnetization and remanence magnetization of magnetic clinoptilolite is 14.787, 0.398 A·m²/kg, magnetic recovery rate is 94.6%, and saturation ion exchangeadsorption capacity to Cu²⁺, Zn²⁺, Cd²⁺ is 12.3, 12.0, 23.4 mg/g, respectively. The magnetic recovered clinoptilolite still retain superparamagnetism and high magnetic recovery rate after exposed in ambient for 100d.

Key words: magnetic clinoptilolite, magnetic property, magnetic recovery rate, saturation exchange-adsorption capacity

中图分类号:

TQ424
O482

王维清,冯启明,董发勤,李虎杰,赵晓东. Fe₃O₄/斜发沸石磁性复合材料的制备及其性能[J]. 无机材料学报, DOI: 10.3724/SP.J.1077.2010.00401.

WANG Wei-Qing,FENG Qi-Ming,DONG Fa-Qin,LI Hu-Jie,ZHAO Xiao-Dong. Preparation and Properties of Fe₃O₄/Clinoptilolite Magnetic Composite[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2010.00401.

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Fe₃O₄/斜发沸石磁性复合材料的制备及其性能

Preparation and Properties of Fe₃O₄/Clinoptilolite Magnetic Composite

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