UiO-66-NH2/GO Composite: Synthesis, Characterization and CO2 Adsorption Performance

Abstract

In this work, a new composite materials of graphene oxide (GO)-incorporated metal-organic framework (MOF)(UiO-66-NH2/GO) were in-situ synthesized, and were found to exhibit enhanced high performances for CO2 capture. X-ray diffraction (XRD), scanning electron microscope (SEM), N2 physical adsorption, and thermogravimetric analysis (TGA) were applied to investigate the crystalline structure, pore structure, thermal stability, and the exterior morphology of the composite. We aimed to investigate the influence of the introduction of GO on the stability of the crystal skeleton and pore structure. Water, acid, and alkali resistances were tested for physical and chemical properties of the new composites. CO2 adsorption isotherms of UiO-66, UiO-66-NH2, UiO-66/GO, and UiO-66-NH2/GO were measured at 273 K, 298 K, and 318 K. The composite UiO-66-NH2/GO exhibited better optimized CO2 uptake of 6.41 mmol/g at 273 K, which was 5.1% higher than that of UiO-66/GO (6.10 mmol/g). CO2 adsorption heat and CO2/N2 selectivity were then calculated to further evaluate the CO2 adsorption performance. The results indicated that UiO-66-NH2/GO composites have a potential application in CO2 capture technologies to alleviate the increase in temperature of the earth’s atmosphere.

Chitosan modified metal–organic frameworks as a promising carrier for oral drug delivery

“…These results were consistent with those of previous studies. [31][32][33] In addition, the XRD patterns of UiO-67 and Zr-NDC differed greatly from those of the other three MOFs, mainly due to the large difference in organic ligands.…”

Effects of Alkali Metal (Li, Na, and K) Incorporation in NH2–MIL125(Ti) on the Performance of CO2 Adsorption

“…As a matter of fact, the extended framework can be controlled by selecting the appropriate metal centers and organic linkers to obtain the desired structural features and physicochemical properties. In order to promote the CO 2 adsorption capacity and the separation selectivity over other gases, various strategies have been reported, such as metal cation incorporation [8,9], pore size and shape tuning [10], and ligand functionality [11,12,13].…”

Strategies to Enhance Carbon Dioxide Capture in Metal‐Organic Frameworks

“…Recently, new in‐situ synthesized composite materials of graphene oxide (GO) with incorporated UiO‐66 and UiO‐66‐NH 2 have been reported, which exhibited an enhanced, high performance for CO 2 capture. For these materials both physisorption and chemisorption of CO 2 has been observed …”