2 research outputs found

    Construction of a Repairable Fixed Porous Catalytic Bed Loaded with Gold Nanoparticles via Multivalent Host–Guest Interactions

    No full text
    The reversible combination between gold nanoparticles (AuNPs) and carriers is crucial for the preparation of a recycle system. Here, a repairable catalytic system was constructed on the basis of AuNPs and porous nickel (PNi) which were combined through the multivalent host–guest interactions between βCD-AuNPs and PNi@IPTS-Azo [β-CD, β-cyclodextrin; IPTS, (3-isocyanatopropyl) triethoxysilane; Azo, azobenzene]. The large specific surface area and connected porous structure of PNi provide a good opportunity to achieve the multivalent interactions between βCD-AuNPs and PNi@IPTS-Azo in the nickel. Additionally, the reaction solution could be catalyzed by flowing over the PNi@IPTS-Azo@βCD-AuNPs substrates. This catalytic model showed a high efficiency close to 95%. Because of the reversible host–guest interactions between β-cyclodextrin and azobenzene, the catalytic system could be regenerated by removing the deactivated AuNPs with UV-light irradiation and recombining new ones through multivalent interactions <i>in situ</i>. This type of catalytic system is regenerative, material-saving, and effective. This system could be expected to be constructed as catalytic fixed beds and applied in industry

    Engineering of Pore Geometry for Ultrahigh Capacity Methane Storage in Mesoporous Metal–Organic Frameworks

    No full text
    Mesoporous Zn<sub>4</sub>O­(−COO)<sub>6</sub>-based metal–organic frameworks (MOFs), including UMCM-1, MOF-205, MUF-7a, and the newly synthesized MOFs, termed ST-1, ST-2, ST-3, and ST-4 (ST = ShanghaiTech University), have been systematically investigated for ultrahigh capacity methane storage. Exceptionally, ST-2 was found to have the highest deliverable capacity of 289 cm<sup>3</sup><sub>STP</sub>/cm<sup>3</sup> (567 mg/g) at 298 K and 5–200 bar, which surpasses all previously reported records held by porous materials. We illustrate that the fine-tuned mesoporosity is critical in further improving the deliverable capacities at ultrahigh pressure
    corecore