Abstract Dual metal zeolitic imidazolate frameworks (ZIF-2M) containing Zn and Co were synthesized in aqueous solution. These nanoparticles were characterized by XRD, FESEM, FTIR and BET. The presence of cobalt led to improved chemical and physical properties such as crystal structure, porosity, specific area and magnetic property while keeping the basic structure of ZIFs. Nanoparticles of ZIF-2M and ZIF-8 were applied for removal of cefixime in aqueous solution. Removal efficiency was investigated for both nanoparticles under optimized conditions. Optimum conditions were achieved by BOX-Behnken design. Results revealed the sorption ability of ZIF-2M (97%) is more than that of ZIF-8 (92%). Langmuir and Freundlich isotherms for cefixime sorption by ZIF-2M in optimal conditions were also studied.

中文翻译：

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双金属沸石咪唑骨架的合成与表征及其去除头孢克肟的应用

摘要 在水溶液中合成了含锌和钴的双金属沸石咪唑骨架(ZIF-2M)。这些纳米颗粒通过 XRD、FESEM、FTIR 和 BET 进行表征。钴的存在改善了化学和物理性质，如晶体结构、孔隙率、比表面积和磁性，同时保持了 ZIF 的基本结构。ZIF-2M和ZIF-8纳米颗粒用于去除水溶液中的头孢克肟。在优化条件下研究了两种纳米颗粒的去除效率。BOX-Behnken 设计实现了最佳条件。结果显示ZIF-2M（97%）的吸附能力高于ZIF-8（92%）。还研究了 ZIF-2M 在最佳条件下吸附头孢克肟的 Langmuir 和 Freundlich 等温线。