Chinese Journal of Applied Chemistry

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Preparation of Water-based β-Cyclodextrin/Fe3O4 Magnetic Fluid and Its Adsorption Behavior for Neutral Red

HUANG Lizhen1, LI Erdong1, LI Bo1, YANG Yonggang2, DONG Chuan1, SHUANG Shaomin1*   

  1. (1.School of Chemistry and Chemical Engineering,Taiyuan 030006,China;
    2.Institute of Loess Plateau,Shanxi University,Taiyuan 030006,China)
  • Received:2013-07-18 Revised:2013-09-26 Published:2014-05-10 Online:2014-05-10

Abstract: Citric acid grafted β-cyclodextrin(CA-β-CD) modified water-based Fe3O4 magnetic fluid was synthesized via chemical coprecipation method. The structure, morphology, composition and magnetic property of the magnetic fluid were characterized by Fourier transform infrared spectroscopy(FTIR), transmission electron microscopy(TEM), thermogravimetric analysis(TGA), X-ray diffraction(XRD) and vibrating sample magnetometer(VSM). The results show that the magnetic particles of magnetic fluid disperse well and the diameters are in the range of (7±2) nm .The magnetic fluid is super-paramagnetic and magnetic saturation values are 62 A·m2/Kg and 43 A·m2/Kg before and after modification by CA-β-CD. The magnetic fluid was used as an adsorbent for neutral red(NR). The adsorption time, the initial concentration of NR and pH of the solution were studied. The results show that the magnetic fluid has the highest adsorption effect for NR, maximum adsorption capacity is 244 mg/g and the adsorption efficiency is up to 99.8% under the neutral condition.

Key words: &, beta, -cyclodextrin, water-based magnetic fluid, preparation, adsorption, neutral red

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