Fe3O4磁性纳米粒子对花旗松素的吸附性能研究

Study on the adsorption of Fe3O4 magnetic nanoparticles for Taxifolin

关键词:  Fe₃O₄磁性纳米粒子  花旗松素  热力学  动力学  吸附

Key words:  Fe₃O₄ magneticna noparticles  Taxifolin  thermodynamics  kinetics  adsorption

摘要:

[目的] 制备Fe₃O₄磁性纳米粒子并考察其对黄酮类化合物花旗松素的吸附性能，研究其动力学与热力学过程。[方法] 采用水热法制备Fe₃O₄磁性纳米粒子，同时建立高效液相色谱（HPLC）法检测花旗松素浓度的方法，用以考察材料对花旗松素的吸附行为。[结果] 吸附过程的热力学参数吉布斯自由能（ΔG^θ）均为负数、焓变（ΔH^θ）为6.58 kJ/mol、熵变（ΔS^θ）为66.24 J/（mol·K）；采用Freundlich模型拟合吸附过程，线性相关性系数均大于0.964 4。[结论] 吸附过程ΔH^θ > 0、ΔS^θ > 0、ΔG^θ < 0，表明吸附过程自发进行，为吸热过程，且存在氢键结合力和范德华力作用。

Abstract:

[Objective] The aim of this study is to analyze the kinetics and thermodynamics of the Taxifolin adsorption by using the prepared Fe₃O₄ magneticnanoparticles.[Methods] Fe₃O₄ is prepared by hydrothermal method. The adsorptionproperties is regulated by the developed HPLC method for the simultaneous determination of Taxifolin.[Results] The results shows that the thermodynamic parameters of Gibbs free energy(ΔG^θ) is under zero, Enthalpy(ΔH^θ) is 6.58. The process fits well with preudo-first order model.[Conclusion] The adsorption is a spontaneous and exothermic process of increased entropy, there is hydrogen bonding force and van der waals between it.