MIL-101(Cr)材料的合成及对水中布洛芬的吸附研究

Study on synthesis and adsorption performance of MIL-101(Cr)to ibuprofen in water

制备了MIL-101(Cr)材料,借助X-射线衍射和红外光谱技术确认了标题化合物的结构,利用扫描电子镜(SEM)技术及物理吸附技术表征了其形貌特征与孔结构特征。结果表明MIL-101(Cr)材料大小均匀,平均粒径为0.8μm,BET比表面积与总孔容积分别为1505 m^(2)·g^(-1)和0.11 cm^(3)·g^(-1)。随后进行了对布洛芬的吸附研究,结果表明MIL-101(Cr)对布洛芬的吸附在30 min即可达到平衡,且为拟一级动力学过程,符合Langmuir吸附模型,最大吸附量为136.3 mg·g^(-1)。10 mg MIL-101(Cr)吸附剂可实现20 mg·L^(-1)布洛芬溶液中溶质的98%去除率。以上实验结果可为探究MIL-101(Cr)在水中有机污染物的去除提供参考。

In this work,MIL-101(Cr)was synthesized by a hydrothermal route.X-ray diffraction(XRD)and Infrared Spectroscopy(IR)study confirms the crystalline nature of the title compound,whereas scanning electron microscopy(SEM)and nitrogen physical adsorption/desorption analysis indicate the morphological and the pore structure characteristics of the title compound.Experimental results show that MIL-101(Cr)particles are uniform polyhedral with a mean diameter of 0.8 μm.The BET surface area and the total pore volume of the title compound is 1505 m^(2)·g^( -1) and 0.11 cm^(3)·g ^(-1 ),respectively.Furtherly,MIL-101(Cr)was applied to the adsorption demonstration of ibuprofen in water.Correspondingly,it took 30 min for MIL-101(Cr)to reach its adsorption equilibrium.The adsorption of ibuprofen by MIL-101(Cr)can be treated as a pseudo-first-order kinetic process with a maximum absorption amount of 136.3 mg·g -1 and is quite fit the Langmuir adsorption model too.The 98%removal rate of ibuprofen in a 20 mg·L^(-1) solution was achieved by the addition of 10 mg MIL-101(Cr)adsorbent.The results presented in this work could provide a help for exploring the adsorption applications of pollutants in water by MIL-101(Cr)materials.