Pressure resistance of copper benzene-1,3,5-tricarboxylate – carbon aerogel composites
| Autor: | Laura P. Nichele, Balázs Vince Nagy, Dávid Ferenc Srankó, Andrea Domán, Krisztina László, János Madarász |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Physics and Astronomy chemistry.chemical_element Aerogel 02 engineering and technology Surfaces and Interfaces General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Copper Tricarboxylate 0104 chemical sciences Surfaces Coatings and Films Adsorption chemistry Chemical engineering Metal-organic framework 0210 nano-technology Mesoporous material Carbon Bar (unit) |
| Zdroj: | Applied Surface Science. 434:1300-1310 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2017.11.251 |
| Popis: | The protective effect of a resorcinol – formaldehyde based carbon aerogel (CA) support was compared in two different forms of the hybrid made of copper benzene-1,3,5-tricarboxilate (HKUST-1) and CA. HKUST-1:CA with identical mass ratio (1:1). HKUST-1+CAis a physical mixture while in HKUST-1@CA the metal organic framework (MOF) crystals were grown on CA under solvothermal conditions. The effect of water vapour and the external pressure (25–200 bar) was investigated. TG/DTG data show that the prehistory of the samples has a strong influence on their thermal behaviour and nitrogen data suggest that part of the MOF grows in the wider pores of the HKUST-1@CA sample. Although there are no dramatic differences in the water adsorption isotherms, the physical mixture is slightly more proficient. In dry samples under compression the crystalline structure of the free HKUST-1 is well conserved. The nanoscale structure of the hybrids is sensitive to applied pressure and formation of mesopores of wide size distribution occurs. No significant difference was found between the corresponding CH4 adsorption isotherms of the composite samples, either in the as-prepared samples or after compression at 100 bar. After being exposed to high external pressure the CH4 uptake seems to be governed by the MOF. |
| Databáze: | OpenAIRE |
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