化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (3) : 203-206.

科学研究

稀土金属有机骨架材料对染料的吸附性能研究

付秋平, 李晓春, 严伟, 刘渊, 罗军, 聂盛强

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Study on adsorption property of rare-earth metal-organic framework material on dye

Fu Qiuping, Li Xiaochun, Yan Wei, Liu Yuan, Luo Jun, Nie Shengqiang

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Received		Published
2019-05-27		2020-03-20
Issue Date	Revised Date
2020-04-02	2019-05-27

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摘要

以均苯三甲酸和六水合硝酸钇(Ⅲ)为原料,合成了一种稀土金属有机骨架材料Y(BTC)(H₂O)(Y-BTC)。通过XRD对材料的物相进行表征,并采用紫外可见分光光度计研究了刚果红的初始浓度、吸附作用时间、溶液pH、背景离子和Y(BTC)(H₂O)活化等因素对其吸附性能的影响。结果表明,Y(BTC)(H₂O)对刚果红的吸附量随着刚果红初始浓度的增加而逐渐增大,并且酸性溶液和活化有利于Y(BTC)(H₂O)对刚果红的吸附。K⁺、Na⁺、Li⁺ 3种背景离子的存在不利于Y(BTC)(H₂O)对刚果红溶液的吸附,这是由于它们会与刚果红抢占Y(BTC)(H₂O)上的吸附位点,并占据Y(BTC)(H₂O)孔道而减少Y(BTC)(H₂O)与刚果红的接触机会。Y(BTC)(H₂O)对刚果红的吸附过程符合Freundlich等温吸附模型和准二级动力学模型。

Abstract

A rare-earth metal-organic framework material Y(BTC)(H₂O)(Y-BTC) was synthesized by benzene-1,3,5-tricarboxylic acid and yttrium(Ⅲ) nitrate hexahydrate as raw materials.The phase of the Y(BTC)(H₂O) was characterized by XRD.The effect of initial concentration of congo red,adsorption time,the solution pH,background ions,Y(BTC)(H₂O) activation on adsorption performance were studied by using UV-visible spectrophotometer.The results shown that the adsorption capacity of Y(BTC)(H₂O) increased with increasing the initial concentration of congo red.Acid solution and activation were beneficial to adsorption of congo red by Y(BTC)(H₂O).The adsorption amount of Y(BTC)(H₂O) on congo red decreased with the addition of background ions Li⁺,K⁺ and Na⁺.The presence of K⁺,Na⁺ and Li⁺ background ions was not conducive to the adsorption of Y(BTC)(H₂O) on congo red.This was because they seized the adsorption site of Y(BTC)(H₂O) and occupied the pore passage of Y(BTC)(H₂O) with congo red,thus reduced the contact opportunities between Y(BTC)(H₂O) and congo red.

关键词

Y(BTC)(H₂O) / 刚果红 / 吸附性能

Key words

Y(BTC)(H₂O) / congo red / adsorption property

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稀土金属有机骨架材料对染料的吸附性能研究[J]. 化工新型材料, 2020, 48(3): 203-206 DOI:

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