β-环糊精修饰的乙烷桥键有序介孔有机硅材料的合成及应用

Synthesis and Application of Ethyl-bridged Periodic Mesoporous Organosilica Modified by β-Cyclodextrin

摘要:

该文用“嫁接”的方法将β-环糊精（β-CD）修饰在乙烷桥键有序介孔有机硅材料（PMO）上，并以同样的方法合成了β-CD修饰的介孔材料SBA-15作为对比材料。通过傅里叶红外光谱（FTIR）、高分辨透射电镜（HRTEM）、X射线粉末衍射（XRD）、氮气吸附以及热分析（TGA）实验对修饰前后的PMO材料进行表征。考察了修饰前后PMO材料对于水中污染物苯胺和对苯二酚的吸附性能，由结果可知，β-CD修饰的乙烷桥键有序介孔有机硅材料（PMO-CD）对于苯胺的吸附量为1.54mg/g,相对于PMO材料而言，其吸附能力被极大的抑制，而其对于对苯二酚的吸附量为12.94mg/g，吸附性能得到了很大的提高。因此，PMO-CD在处理水中污染物领域具有潜在的应用价值。

Abstract:

In this paper, ethyl-bridged periodic mesoporous organosilica (PMO) is modified with β-Cyclodextrin (β-CD) using “grafting” method. As a contrast, β-CD modified mesoporous silicas SBA-15 is synthetized by the same method. Functionalized mesoporous PMO materials was characterized by Fourier transform infrared (FTIR) spectroscopy, high-resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (XRD), nitrogen adsorption–desorption measurements and thermogravimetric analysis (TGA). The adsorption properties of the pollutants in water, phenylamine and p-benzenediol, are investigated. For β-CD modified ethyl-bridged periodic mesoporous organosilica (PMO-CD), the results show that the adsorption quantity of phenylamine was 1.54 mg/g, which was reduced due to the β-CD modification comparing with PMO. But the adsorption quantity of p-benzenediol was 12.94 mg/g, which was improved greatly. Therefore, PMO-CD has the potential applications in the treatment of the water pollutants.