Division of Chemistry, Department of Science, Walailak University, Nakhon Si Thammarat 80160, Thailand.
J Environ Sci (China). 2019 Jul;81:68-79. doi: 10.1016/j.jes.2019.02.002. Epub 2019 Feb 13.
In this research, for the first time, a series of Co(II) doped copper terephthalate (CoX-CuBDC, where X is doping percentage) were successfully synthesized via solvothermal method and were tested for dye removal application. The physical properties of CoX-CuBDC were studied by several techniques including X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy-dispersive spectroscopy (EDS), thermogravimetric analysis (TGA) and Brunauer-Emmett-Teller (BET) surface area analysis. The incorporation of Co(II) dopant leads to isomorphic substitution of Cu(II) in the CuBDC framework with the maximum doping percentage of 22. Doping and parent MOFs which are non-porous were used for removal of Methylene Blue (MB) from aqueous solution. Adsorption capacity of Co22-CuBDC and CuBDC are 52 and 58 mg/g, respectively, both of which are higher than the adsorption capacity recorded from several high porosity MOFs. Adsorption kinetic studies indicate that adsorption process follows pseudo-second order model while the adsorption mechanism is dominated by electrostatic attraction. Overall, even though these materials show non-porous characteristic, it can be used effectively in wastewater treatment application.
在这项研究中，我们首次通过溶剂热法成功合成了一系列 Co(II)掺杂的铜对苯二甲酸酯（CoX-CuBDC，其中 X 是掺杂百分比），并将其用于染料去除应用的测试。通过 X 射线衍射（XRD）、场发射扫描电子显微镜（FESEM）、能谱分析（EDS）、热重分析（TGA）和 Brunauer-Emmett-Teller（BET）表面积分析等多种技术研究了 CoX-CuBDC 的物理性质。Co(II)掺杂剂的掺入导致 Cu(II)在 CuBDC 骨架中的同晶取代，最大掺杂百分比为 22。非多孔的掺杂和母体 MOFs 被用于从水溶液中去除亚甲蓝（MB）。Co22-CuBDC 和 CuBDC 的吸附容量分别为 52 和 58mg/g，均高于从几种高孔隙率 MOFs 记录的吸附容量。吸附动力学研究表明，吸附过程遵循准二级模型，而吸附机制主要受静电吸引控制。总的来说，尽管这些材料表现出非多孔的特性，但它们可以有效地用于废水处理应用。
