The Reversible Removal of SO2 by Amino Functionalized ZIF8 with 5-Aminotetrazole via Post-Synthesis Modification

The post-synthesis modification is a highly efficient method for the of Metal-organic framework (MOF) materials, which has been used to synthesize MOF materials purposefully that cannot be prepared by direct synthesis and impregnation method. In this work, amino modified ZIF8 with 5-aminotetrazole was post employed reversibly remove SO2 from flue gas. Based on characterization analysis X-ray diffraction (XRD), Scanning Electron Microscope (SEM), Brunner Emmet Teller (BET), it found functionalized (Zn(5-ATZ)1.5) microporous material two-dimensional nano-layered structure. According adsorption experiments, capacity at concentration 1.6% vol can reach 122 mg/g under optimal conditions (25 °C, 2865 h−1). Five successive adsorption-desorption experiments exhibited Zn(5-ATZ)1.5 had excellent regeneration performance. results Raman Spectra (Raman) photoelectron spectroscopy (XPS) as well DFT simulation calculations revealed mainly interacted hydrogen bonds between O H in Zn(5-ATZ)1.5, interaction N forming non-covalent charge transfer complex. This work suggested an potential sorbent removal.