物理化学学报 >> 2007, Vol. 23 >> Issue (12): 1893-1898.doi: 10.3866/PKU.WHXB20071212

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超声波合成磁性4A沸石分子筛

曹吉林; 邢冬强; 刘秀伍; 谭朝阳   

  1. 河北工业大学化工学院, 天津 300130
  • 收稿日期:2007-05-29 修回日期:2007-09-04 发布日期:2007-11-30
  • 通讯作者: 曹吉林 E-mail:caojilin@hebut.edu.cn

Synthesis of Magnetic 4A Zeolite at Ultrasonic Condition

CAO Ji-Lin; XING Dong-Qiang; LIU Xiu-Wu; TAN Zhao-Yang   

  1. School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China
  • Received:2007-05-29 Revised:2007-09-04 Published:2007-11-30
  • Contact: CAO Ji-Lin E-mail:caojilin@hebut.edu.cn

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摘要： 为了解决微细粉末状沸石产品应用中与所处理溶液难以分离的问题, 在传统水热合成法合成4A沸石的晶化原料液中, 加入磁性Fe3O4微粒, 经过70 ℃, 功率为100 W的超声波晶化6 h, 合成了一系列Fe3O4含量不同的磁性4A沸石,并对其进行了XRD、SEM、IR、TG/DTA、EDX、磁化率及吸附性能等表征测试. 结果表明, 磁性4A沸石具有良好的磁稳定性, 其磁化率随Fe3O4含量的增加而增大; 磁性4A沸石对水中氟离子和六价铬的吸附与纯4A沸石性能相同, 其吸附速率可以用拟二级动力学方程来描述.

关键词: 超声波, 磁性4A沸石, 吸附, 水热法

Abstract: In order to solve the difficulty in separating powdery 4A zeolite from solution in application of 4A zeolite, a series of magnetic 4A zeolites with different Fe3O4 contents were synthesized by traditional hydrothermal method through ultrasonic crystallization for 6 h at 70 ℃ after adding magnetic Fe3O4 particulates to the crystallization solution for 4A zeolite synthesis. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), IR, magnetic susceptibility, TG/DTA, EDX and ion exchange capability. The results showed that the magnetic 4A zeolite had good magnetism and its magnetic susceptibility increased with the Fe3O4 amount increasing. For adsorption of F- and Cr (VI) in water, the adsorption capability of magnetic 4A zeolite is equal with the pure 4A zeolite and the adsorption rate filled well the pseudo-second-order rate model.

Key words: Ultrasonic, Magnetic 4A zeolite, Adsorption, Hydrothermal method