Effects of -NO2 and -NH2 functional groups in mixed-linker Zr-based MOFs on gas adsorption of CO2 and CH4
MetadataShow full item record
This study was undertaken to evaluate the effects of mixing BDC-NO 2 and BDC-NH 2 linkers in the synthesis of Zr-based metal organic frameworks (Zr-MOFs) on their adsorption and separation of CO 2 and CH 4 . UiO-66 with single or binary -NO 2 and -NH 2 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, 1 HNMR and N 2 adsorption/desorption techniques and adsorption of CO 2 and CH 4 at high pressures and different temperatures (273 and 298 K) was investigated. It was found that UiO-66-NH 2 exhibited higher CO 2 and CH 4 adsorption capacities than those of UiO-66-NO 2 . Addition of -NH 2 functional group in UiO-66-NO 2 could enhance CO 2 and CH 4 adsorption due to the extra CO 2 adsorption sites of -NH 2 functional groups. Addition of -NO 2 functional group to UiO-66-NH 2 at a low loading could also increase CO 2 and CH 4 adsorption, however, a high loading of NO 2 functional group to UiO-66-NH 2 would result in decreased adsorption.
Showing items related by title, author, creator and subject.
Che Ibrahim, Shariff (2010)Barley straw, an agricultural byproduct, was identified as a potential adsorbent material for wastewater treatment as it offers various advantages such as abundant availability at no or very low cost, little processing ...
Kirwan, Luke J. (2002)For the majority of tailings substrates, flocculant adsorption proceeds through hydrogen bonding of the amide functionalities with neutral surfaces. However, flocculation of Bayer process residue solids takes place in ...
The interplay between molecular layering and clustering in adsorption of gases on graphitized thermal carbon black - Spill-over phenomenon and the important role of strong sitesDo, D.; Tan, S.; Zeng, Y.; Fan, Chunyan; Nguyen, V.; Horikawa, T.; Nicholson, D. (2015)We analyse in detail our experimental data, our simulation results and data from the literature, for the adsorption of argon, nitrogen, carbon dioxide, methanol, ammonia and water on graphitized carbon black (GTCB), and ...