Effects of -NO2 and -NH2 functional groups in mixed-linker zr-based MOFs on gas adsorption of CO2 and CH4

Authors

Zana Hassan Rada
Hongqi Sun, Edith Cowan UniversityFollow
Jin Shang
Jiaye Li
Yingdian He
Shaomin Liu
Shaobin Wang

Document Type

Journal Article

Publication Title

Progress in Natural Science: Materials International

Publisher

Elsevier BV

School

School of Engineering

RAS ID

28300

Comments

Rada, Z. H., Abid, H. R., Sun, H., Shang, J., Li, J., He, Y., . . . Wang, S. (2018). Effects of -NO2 and -NH2 functional groups in mixed-linker zr-based MOFs on gas adsorption of CO2 and CH4. Progress in Natural Science: Materials International, 28(2), 160-167. Available here

Abstract

This study was undertaken to evaluate the effects of mixing BDC-NO₂ and BDC-NH₂ linkers in the synthesis of Zr-based metal organic frameworks (Zr-MOFs) on their adsorption and separation of CO₂ and CH₄. UiO-66 with single or binary -NO₂ and -NH₂ samples were synthesized under solvothermal conditions and activated by solvent exchanging using methanol. Structural analyses of the materials were conducted using FTIR, XRD, TGA, SEM, ¹HNMR and N₂ adsorption/desorption techniques and adsorption of CO₂ and CH₄ at high pressures and different temperatures (273 and 298 K) was investigated. It was found that UiO-66-NH₂ exhibited higher CO₂ and CH₄ adsorption capacities than those of UiO-66-NO₂. Addition of -NH₂ functional group in UiO-66-NO₂ could enhance CO₂ and CH₄ adsorption due to the extra CO₂ adsorption sites of -NH₂ functional groups. Addition of -NO₂ functional group to UiO-66-NH₂ at a low loading could also increase CO₂ and CH₄ adsorption, however, a high loading of NO₂ functional group to UiO-66-NH₂ would result in decreased adsorption.

DOI

10.1016/j.pnsc.2018.01.016

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