Paper Title
Comparative Study of 〖Co〗_2 Adsorption on Zif-8 and ZIF-8/Peg

Abstract
Zeolitic imidazolate framework-8 (ZIF-8) is well-known for its remarkable properties compared to other adsorbents. In this study, the effect of incorporation of polyethylene glycol (PEG), as a mesogenerating agent, into ZIF-8, on〖CO〗_2 adsorption capacity has been investigated. To fulfill this aim, ZIF-8/PEG samples were successfully synthesized with 0.05 and 0.1 of PEG/Zn molar ratio via solvothermal method. The textural and surface characteristics of samples were determined by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and Brunauer-Emmett-Teller (BET) surface area analysis. The single-component isotherms of 〖CO〗_2 on the virgin ZIF-8, ZIF-8/PEG0.05 and ZIF-8/PEG0.1 were measured at 298K. The results indicatethat as PEG concentration increases, the BET surface area and〖CO〗_2 adsorption capacity decrease. In other words, the BET surface area and adsorptive capacity of ZIF-8/PEG0.1 declines by 16.9% and 11%, respectively, compared to the parent ZIF-8. In addition, it is observed that the PEG concentration affects the porosity of the synthesized materials. Index terms〖CO〗_2 adsorption,meso-structure, PEG, ZIF-8