高级检索

    不同配体合成的锆基MOFs吸附VOCs的试验研究

    Experimental study on VOCs adsorption by Zr-MOFs synthesizedwith different ligands

    • 摘要: 以对苯二甲酸作为基础配体,采用功能化官能团配体 2-氨基对苯二甲酸、1,4-萘二甲酸以及长链配体联苯二甲酸,水热合成 UIO-66、UIO-66-NH2、UIO-66-NDC 和 UIO-67 等含有不同配体的锆基 MOFs 吸附材料。 利用 XRD、FTIR、BET 表征分析了这 4 种材料,分别考察了其对甲苯和乙酸乙酯的动态吸附容量。 结果表明:具有 4 种不同配体的 MOFs 均合成成功;在相对湿度为 80%时,UIO-66 表现出最高的吸附容量,甲苯吸附量高达 139.4 mg / g,乙酸乙酯吸附量为 60.8mg / g;UIO-66 具有最佳吸附性能归因于其以微孔为主的孔径结构,BET 结果显示其微孔分布在0.5~1 nm 之间,有利于小分子 VOCs 的吸附,展示出良好的应用潜力。

       

      Abstract: Zirconium -based MOFs adsorbent materials with different ligands, including: UIO - 66,UIO-66-NH2, UIO-66-NDC and UIO-67 were hydrothermally synthesized using terephthalic acid asthe base ligand and functionalized functional group ligands 2-aminoterephthalic acid, 1,4-naphtha⁃lenedicarboxylic acid and the long - chain ligand biphenyl dicarboxylic acid. The four adsorbentmaterials were characterized by XRD, FTIR and BET, and the adsorption performance on toluene andethyl acetate was investigated. The results showed that all four MOFs with different ligands were suc⁃cessfully synthesized, and UIO-66 showed the best adsorption performance at a relative humidity of80%, with toluene adsorption of 139.4 mg / g and ethyl acetate adsorption of 60.8 mg / g. The best ad⁃sorption performance of UIO-66 was attributed to its predominantly microporous pore size structure,showing good application potential. BET results showed that the micropore distribution was between 0.5~1 nm, which facilitated the adsorption of small molecule VOCs.

       

    /

    返回文章
    返回