Solvothermal synthesis, nanostructural characterization and gas cryo-adsorption studies in a metal–organic framework (IRMOF-1) material. (14th September 2017)

• Record Type: Journal Article
• Authors: Tzitzios, Vasileios; Kostoglou, Nikolaos; Giannouri, Maria; Basina, Georgia; Tampaxis, Christos; Charalambopoulou, Georgia; Steriotis, Theodore; Polychronopoulou, Kyriaki; Doumanidis, Charalambos; Mitterer, Christian; Rebholz, Claus
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 37(2017)
• Page Start: 23899
• Page End: 23907
• Publication Date: 2017-09-14
• Subjects: IRMOF-1 -- Solvothermal synthesis -- Structure -- Porosity -- Gas adsorption -- Hydrogen storage; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2017.04.059
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: A nanoporous metal–organic framework material, exhibiting an IRMOF-1 type crystalline structure, was prepared by following a direct solvothermal synthesis approach, using zinc nitrate and terephthalic acid as precursors and dimethylformamide as solvent, combined with supercritical CO2 activation and vacuum outgassing procedures. A series of advanced characterization methods were employed, including scanning electron microscopy, Fourier-transform infrared radiation spectroscopy and X-ray diffraction, in order to study the morphology, surface chemistry and structure of the IRMOF-1 material directly upon its synthesis. Porosity properties, such as Brunauer–Emmet–Teller (BET) specific area (∼520 m 2 /g) and micropore volume (∼0.2 cm 3 /g), were calculated for the activated sample based on N2 gas sorption data collected at 77 K. The H2 storage performance was preliminary assessed by low-pressure (0–1 bar) H2 gas adsorption and desorption measurements at 77 K. The activated IRMOF-1 material of this study demonstrated a fully reversible H2 sorption behavior combined with an adequate gravimetric H2 uptake relative to its BET specific area, thus achieving a value of ∼1 wt.% under close-to-atmospheric pressure conditions. Highlights: IRMOF-1 powder synthesized by solvothermal method and supercritical CO2 activation. Cubic nano-sized crystals with ∼520 m 2 /g specific area and ∼0.2 cm 3 /g pore volume. Fully reversible H2 sorption isotherms with an uptake of ∼1 wt.% at 77 K and ∼1 bar. High ratio of H2 uptake to specific area under low pressures compared to other MOFs.