Cd 和 Zn 与 2,4,6-三(2-吡啶基)-s-三嗪和对苯二甲酸形成的配合物用于刚果红的快速高容量吸附。
Cd and Zn Complexes with 2,4,6-Tri(2-pyridyl)-s-Triazine and Terephthalate for Rapid, High-Capacity Adsorption of Congo Red.
机构信息
College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, P. R. China.
Inner Mongolia Vocational College of Chemical Engineering, Hohhot, 010070, P. R. China.
出版信息
ChemistryOpen. 2023 Feb;12(2):e202200176. doi: 10.1002/open.202200176.
Three crystal complexes were designed and synthesised through the solvothermal method, with Cu , Zn , and Cd ions as the metal centres and 2,4,6-tri(2-pyridyl)-s-triazine (TPTZ) and terephthalate (BDC ) as the ligands. Their compositions were determined to be Cd(TPTZ)Cl (Cd-MOF), {[Zn(TPTZ)(BDC)] ⋅ 3H O} (Zn-MOF), and Cu (PCA) (BDC)(H O) (Cu-MOF) (PCA =2-pyridinium amide), respectively. Cd-MOF can adsorb 90 % of Congo red (CR) in 10 s at room temperature and atmospheric pressure, and CR removal was complete at 20 s over a wide pH range. The adsorption capacity for CR reached 1440 mg g in 5 min. Selective adsorption was demonstrated in mixed dyes. The adsorption kinetic data agree well with the pseudo-second-order kinetic model. The Temkin model was successfully used to evaluate the adsorption isotherms of CR on Cd-MOF at room temperature, suggesting that adsorption occurs through a hybrid of monolayer and multilayer mechanisms.
通过溶剂热法设计并合成了三种晶体配合物，以 Cu、Zn 和 Cd 离子作为金属中心，2,4,6-三（2-吡啶基）-均三嗪（TPTZ）和对苯二甲酸（BDC）作为配体。它们的组成分别确定为 Cd(TPTZ)Cl（Cd-MOF）、{[Zn(TPTZ)(BDC)]·3H₂O}（Zn-MOF）和 Cu（PCA）（BDC）（H₂O）（Cu-MOF）（PCA=2-吡啶酰胺）。Cd-MOF 在室温常压下 10 s 内即可吸附 90%的刚果红（CR），在较宽的 pH 值范围内 20 s 内即可完成 CR 的去除。在 5 min 内，CR 的吸附容量达到 1440 mg·g。在混合染料中表现出选择性吸附。吸附动力学数据与准二级动力学模型吻合较好。Temkin 模型成功地用于评估室温下 CR 在 Cd-MOF 上的吸附等温线，表明吸附是通过单层和多层机制的混合发生的。
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