Copper benzene-1,3,5-tricarboxylate (HKUST-1) – Graphene oxide pellets for methane adsorption

Domán, Andrea [Domán, Andrea (Fizikai kémia), szerző] Fizikai Kémia és Anyagtudományi Tanszék (BME / VBK); Madarász, Janos [Madarász, János (Analitikai kémia), szerző] Szervetlen és Analitikai Kémia Tanszék (BME / VBK); Sáfrán, György [Sáfrán, György (Vékonyrétegfizika), szerző] Vékonyrétegfizika Laboratórium (EK / MFA); Wang, Ying; László, Krisztina [Nagyné László, Krisztina (Fizikai kémia), szerző] Fizikai Kémia és Anyagtudományi Tanszék (BME / VBK)

Angol nyelvű Tudományos Szakcikk (Folyóiratcikk)
Megjelent: MICROPOROUS AND MESOPOROUS MATERIALS 1387-1811 316 Paper: 110948 , 8 p. 2021
  • SJR Scopus - Chemistry (miscellaneous): Q1
Azonosítók
Szakterületek:
    Copper benzene-1,3,5-tricarboxylate (HKUST-1) is one of the materials holding the greatest potential for clean energy gases among microporous storage materials. Although this material is commercially available as a powder with particle size 10–20 μm, for easier handling adsorbents are preferentially employed as pellets or monoliths. Even under binder free conditions there could be a high price to pay for compacting: loss in crystallinity and in porosity. To determine the protection potential of graphene oxide (GO) a HKUST-1@GO composite was studied. The material of 16% GO was obtained in a single step solvothermal synthesis. The pristine HKUST-1 as well as HKUST 1@GO formed consistent, integrated pellets when compressed at 25 and 50 bar without any binder. Powder-XRD and N2 adsorption were used to monitor the changes in crystallinity and pore structure. It was found that GO has a protective effect against the 25 or 50 bar applied pressure, as 75% of the pore volume and the apparent surface area is saved in HKUST 1@GO (vs. 43% and 47%, respectively, in HKUST-1) after compression. Presumably, the flexible GO sheets with high mechanical stability act as compressible spacers between the crystals thus preventing their amorphisation. Comparison of the adsorption properties of the HKUST-1 and HKUST-1@GO powders and pellets revealed that the performed compression deteriorated the structure of the MOF and thus reduced the CH4 uptake. Further studies are needed to optimize the compression pressure for a more reasonable loss in the gas uptake capacity.
    Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSLMásolásNyomtatás
    2022-01-28 20:14