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New insights into UTSA-16

New insights into UTSA-16

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Tidsskriftspublikasjon
Sammendrag
Among the metal organic framework materials proposed for CO2 separation, UTSA-16 possesses the highest CO2 volumetric density explained on the basis of favourable interactions between CO2 and structural water molecules in the material, as revealed by neutron diffraction. In this study, UTSA-16 was synthesised and extensively characterised by XRD, TEM combined with EDX analysis and DR-UV-Vis, Raman and FTIR spectroscopies, as well as by TGA measurements. The synthesised material shows XRD patterns, surface area, CO2 capacity and isosteric heat coincident to the ones reported for UTSA-16 in the original papers but a higher thermal stability and a complete removal of water upon activation under mild conditions (363 K). On the basis of EDX and IR measurements, the formula of UTSA-16 used in the present study is proposed to be K2Co3(cit)2. Infrared spectroscopy clearly shows that UTSA-16 described in this work reversibly interacts with water vapor, CO and CO2. The interaction is attributed to K+ species, which are present as counterions in the pores. At 1 bar and 298 K a fraction of K+ sites adsorbs 2 CO2 molecules.
Språk
Engelsk
Forfatter(e)
  • Masala Alessio
  • Vitillo Jenny G.
  • Bonino Francesca
  • Manzoli Maela
  • Grande Carlos Adolfo
  • Bordiga Silvia
Institusjon(er)
  • Consiglio Nazionale delle Ricerche
  • SINTEF Materialer og kjemi / Sorbentbaserte teknologier
År
2016
Publisert i
Physical Chemistry, Chemical Physics - PCCP
ISSN
1463-9076
Forlag
RSC Publishing
Årgang
18
Hefte nr.
1
Side(r)
220 - 227