Synthesis, characterization and hydrogen adsorption in mixed crystals of MOF-5 and MOF-177

Dipendu Saha, Shuguang Deng

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Mixed MOF crystals with morphology similar to that of pure MOF-5 and pure MOF-177 were synthesized using two organic solvents: dimethylformamide (DMF) and diethylformamide (DEF). The mixed crystals were characterized with XRD, SEM and TGA for their physical properties and also evaluated for their hydrogen adsorption properties. The XRD and SEM results suggest that the mixed crystals are different from pure MOF-5 and pure MOF-177. The DMF-derived mixed MOF crystals have a slightly higher specific surface area, smaller pore diameter and greater pore volume than those of the DEF-derived crystals, and seem to be a better adsorbent than the DEF-derived crystals, which was confirmed by the higher hydrogen and nitrogen adsorption capacities on the DMF-derived crystals. The hydrogen adsorption capacities on the mixed MOF crystals are lower than those of pure MOF-5 and MOF-177. It was also observed that the hydrogen diffusion time constant increases with hydrogen pressure, and the heat of hydrogen adsorption decreases with adsorbed hydrogen amount on both mixed crystals.

Original languageEnglish (US)
Pages (from-to)2670-2678
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume34
Issue number6
DOIs
StatePublished - Mar 2009
Externally publishedYes

Fingerprint

mixed crystals
Adsorption
Hydrogen
Crystals
adsorption
hydrogen
synthesis
Dimethylformamide
crystals
porosity
scanning electron microscopy
adsorbents
Scanning electron microscopy
time constant
physical properties
Specific surface area
Organic solvents
Adsorbents
nitrogen
heat

Keywords

  • Adsorption
  • Hydrogen
  • Mixed crystals
  • MOF-177
  • MOF-5

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

Synthesis, characterization and hydrogen adsorption in mixed crystals of MOF-5 and MOF-177. / Saha, Dipendu; Deng, Shuguang.

In: International Journal of Hydrogen Energy, Vol. 34, No. 6, 03.2009, p. 2670-2678.

Research output: Contribution to journalArticle

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