双金属UiO-66(Cu/Zr)MOFs的制备及其对刚果红的增强吸附研究

Preparation of Bimetallic UiO-66(Cu/Zr)MOFs and Their Enhanced Adsorption Studies on Congo Red

刚果红是一种致癌率极高的联苯胺染料,通过一步水热合成法制备了UiO-66(Cu/Zr)双金属MOFs,用于吸附水中的刚果红。通过扫描电镜(SEM-EDS)面扫证实Cu^(2+)均匀进入UiO-66有机骨架中。研究表明:UiO-66(Cu/Zr)对刚果红的最大吸附量为498.5 mg·g^(-1),吸附性能较UiO-66(268.0 mg·g^(-1))有显著提升。UiO-66(Cu/Zr)吸附刚果红过程符合拟二级动力学模型(R~2=0.9997)。

Congo red is a highly carcinogenic benzidine dye.UiO-66(Cu/Zr)bimetallic MOFs were prepared by a one-step hydrothermal synthesis method for the adsorption of Congo red in water in this study.The uniform entry of Cu~(2+)into the organic skeleton of UiO-66 was confirmed by scanning electron microscopy energy dispersive(SEM-EDS)mapping.The results showed that the maximum adsorption capacity of UiO-66(Cu/Zr)for Congo red is 498.5 mg·g~(-1),and the adsorption performance is significantly improved compared with that of UiO-66(268.0 mg·g~(-1)).The adsorption of Congo red by UiO-66(Cu/Zr)fit the pseudo-second-order kinetic model(R~2=0.9997).