刻蚀制备介孔UiO-66金属-有机骨架材料研究

Facile Fabricating Mesoporous UiO-66 Metal-organic Frameworks Via H2SO4 Modulator

通过微波法合成了微孔金属-有机骨架材料UiO-66纳米晶,并以H 2SO 4为刻蚀剂,通过简便的缺陷工程策略制备了介孔UiO-66。通过粉末衍射(XRD),透射电子显微镜(TEM)、氮吸附(BET)和热失重(TGA)对样品进行了表征。研究显示,UiO-66纳米晶随着H 2SO 4浓度的增加,纳米晶的比表面积逐步减小,孔径逐渐得到拓展,孔径达到了介孔尺寸,同时,材料均具有良好的热稳定性。通过亚甲基蓝(MB)分子进行验证,结果表明,与原始的UiO-66相比,介孔UiO-66对MB分子具有良好的扩散性能和吸附效果。

In this paper,the microporous metal-organic framework material UiO-66 nanocrystals were synthesized by microwave method,mesoporous UiO-66 was prepared through a facile defect engineering strategy in the presence of H2SO4 modulator.The obtained meso-UiO-66 was characterized by X-ray diffraction,transmission electron microscopy,nitrogen adsorption-desorption isotherms and thermogravimetry analysis.The results showed the BET of UiO-66 nanocrystals gradually decreases and the pore size slowly expands to mesopore size with the increase of the concentration of acid content in solution,and the nanocrystals UiO-66 exhibits a good hydrothermal stability.Results indicated that mesoporous UiO-66 exhibited remarkably adsorption kinetics and capacity by methylene blue(MB)molecular verification compared with the pristine UiO-66.