金属有机框架材料MIL-53(Al)-F127对双酚A的吸附性能

采用一步溶剂热法制备具有介孔结构金属有机框架材料MIL-53(Al)-F127，用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射仪(XRD)、傅里叶红外变换光谱仪(FTIR)、全自动比表面积及孔隙度分析仪(BET)等手段表征其形貌和结构，探究其对双酚A(BPA)的吸附性能并与微孔结构的MIL-53(Al)对比，研究了吸附剂的含量、pH以及温度对其吸附性能的影响。结果表明，介孔结构金属有机框架材料MIL-53(Al)-F127对双酚A具有良好的吸附性能；在pH值为6、温度为30℃条件下MIL-53(Al)-F127在20 min左右达到最大平衡吸附量为27.2 mg/g，去除率达到92%。其吸附动力学模型拟合结果，符合准二级动力学曲线。

Adsorption Properties of Metal-organic Framework Material MIL-53(Al)-F127 for Bisphenol A

Mesostructured metal-organic framework material MIL-53(Al)-F127 was synthesized by one-step solvothermal method, and the morphology and structure of MIL-53(Al)-F127 were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffractometer (XRD), Fourier-transform infrared spectrometer (FTIR) and N₂ adsorption-desorption (BET). The adsorption performance of MIL-53(Al)-F127 and the microporous structure MIL-53(Al) on bisphenol A in aqueous solution and the influence of the adsorbent concentration, pH, temperature were comparatively investigated. Results show that MIL-53(Al)-F127 exhibited good adsorption properties for bisphenol A in aqueous solution. The optimum pH level for the removal of BPA using MIL-53(Al)-F127 were 6. The optimum temperature for the sorption behavior of BPA on the sorbent was 30℃. The equilibrium sorption amounts of BPA on MIL-53-(Al)-F127 reached approximately 27.2 mg/g, the removal efficiency was 92% after approximately 20 min. The sorption kinetics of BPA were found to follow the quasi second order dynamic model.