A composite metal-organic framework material with high selective adsorption for dibenzothiophene

A copper-centred metal-organic framework material MOF-101 with 2-bromine terephthalic acid as ligands was synthesized by solvothermal method at 70 degrees C and modified by loading Ag+ to improve the selective adsorption performance. The MOF-101 and Ag+/MOF-101 prepared were characterised by powder X-ray diffraction, X-ray fluorescence, Fourier transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis. The adsorptive desulphurisation was quantified by adsorbing dibenzothiophene (DBT) from model oils. The loading of Ag+ enhanced the deep adsorptive desulfurization capacity for DBT and significantly weaken the adsorption competitiveness of toluene. As a result, the DBT concentration of model oil was reduced from 50 ppm(s) to 10.2 ppms. Possible understandings were put forward to explain the adsorption performance of Ag+/MOF-101. The kinetics and isotherm data can be well-described by the pseudo-second-order kinetic model and the Langmuir model. (C) 2019 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.