Adsorption Properties of Ce5(BDC)7.5(DMF)4 MOF

Abstract

In this article we report on the spectroscopic and adsorptive studies done on Ce(III)-based MOF possessing, upon desolvation, open metal sites, and a discrete surface area. The Ce-based MOF was synthesized from terephthalic acid linker (H2BDC) and Ce3+ cations by the classical solvothermal method. Preliminary powder X-ray diffraction analysis showed that the obtained materials corresponded to the ones reported by other authors. Spectroscopic techniques, such as XAS and in situ FTIR with probe molecules were used. In situ FTIR spectroscopy confirmed the successful removal of DMF molecules within the pore system at temperatures above 250 °C. Moreover, the use of CO as a probe molecule evidenced the presence of a Ce3+ open metal sites. Detailed volumetric and calorimetric CO2 adsorption studies are also reported.

Spherically Structured Ce‐Metal‐Organic Frameworks with Rough Surfaces and Carbon‐Coated Cerium Oxide as Potential Electrodes for Lithium Storage and Supercapacitors

“…Figure S1 shows the powder X‐ray diffraction (PXRD) pattern for Ce‐MOF, which coincides with reports of Cesare et al [20] . and its crystal structure was predicted by Han et al [29] .…”

“…The cerium metal‐organic framework (Ce‐MOF) is obtained by a modified procedure reported earlier [20] . Typically, the organic linker terephthalic acid (TPA) is obtained by simple depolymerization of abundant waste polyethylene terephthalate bottles.…”

“…The cerium metal-organic framework (Ce-MOF) is obtained by a modified procedure reported earlier. [20] Typically, the organic linker terephthalic acid (TPA) is obtained by simple depolymerization of abundant waste polyethylene terephthalate bottles. However, transparent PET bottles are cut into small pieces, approximately � 1 cm, which is immersed in ethanol overnight and washed with de-ionized (DI) water to remove the dirt and glue.…”

“…The Ce-MOF offers a spherical shape morphology and retains the morphologies after calcination. [20] In the present study, spherical Ce-MOF is synthesized by the solvothermal method with an organic linker terephthalic acid (TPA). It furnished to synthesize CeO 2 and C@CeO 2 by post calcination at 550 °C.…”

Power of Infrared and Raman Spectroscopies to Characterize Metal-Organic Frameworks and Investigate Their Interaction with Guest Molecules

“…Two Ce 3+ -CO bands were reported to appear after CO adsorption on Ce 5 (BDC) 7.5 (DMF) 4 , at 2161 and 2152 cm –1 . The authors tentatively associated these bands with two different Ce 3+ sites.…”