文献类型：期刊文献

英文题名：Tuning the adsorption properties of UiO-66 via acetic acid modulation

作者：Liu, Naiwang[1];Shi, Li[1];Meng, Xuan[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：131

期号：6

外文期刊名：JOURNAL OF CHEMICAL SCIENCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000469883100002)】；

基金：We are very grateful and want to extend our sincere appreciations for the financial support from National Natural Science Foundation of China (No. 21808054), China Postdoctoral Science Foundation (No. 2017M621389), Science and Technology Commission of Shanghai Municipality (Sailing Program 18YF1406300), and Explore and Research Foundation for Youth Scholars of Ministry of Education of China (No. 222201814011).

语种：英文

外文关键词：Desulfurization; dibenzothiophene; acetic acid; defects; adsorption

摘要：UiO-66 (Universitetet i Oslo) is one of the most known metal-organic frameworks with high hydrothermal stability. In this work, a series of UiO-66 were prepared using acetic acid as a modulator to produce linker defects. Samples were characterized by X-ray powder diffraction, nitrogen adsorption-desorption isotherms, thermogravimetric analysis and adsorptive desulfurization test. Results indicated that increasing the amount of acetic acid to 30% equivalent with respect to terephthalic acid did not have an obvious negative effect on the structure. At the same time, surface area and micropore pore volume are further increased from 988 m(2)/g, 0.34 cm(3)/g to 1424 m(2)/g, 0.54 cm(3)/g. Adsorptive desulfurization performance is also significantly improved from 6.0 mg/g to 7.9mg/g. So, the linker defects produced by acetic acid can remarkably enhance the adsorption ability. Adsorptive desulfurization kinetics indicates that while indicating the monomolecular layer, chemical adsorption occupies the dominant position, and there is no special chemical force formed between the defects and dibenzothiophene.