Naslov
Benign by design: Green and scalable synthesis of zirconium UiO-metal−organic frameworks by water-assisted mechanochemistry

Autori
Karadeniz, Bahar ; Howarth, Ashlee J. ; Stolar, Tomislav ; Islamoglu, Timur ; Dejanović, Igor ; Tireli, Martina ; Wasson, Megan C. ; Moon, Su-Young ; Farha, Omar K. ; Friščić, Tomislav ; Užarević, Krunoslav

Izvornik
ACS Sustainable Chemistry & Engineering (2168-0485) 6 (2018), 11; 15841-15849

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
zirconium MOFs ; zirconium acetate precursor ; mechanochemistry ; simple activation procedures ; twin-screw extrusion ; catalytic activity

Sažetak
We present a solvent-free, green, and rapid mechanochemical route for the synthesis of a series of zirconium metal–organic frameworks (MOFs) composed of Zr6 cluster nodes, UiO-66, UiO- 66-NH2, MOF-801, and MOF-804, both on a laboratory scale and by scalable and flow mechanochemical processing. The methodology, based on the use of a nonconventional zirconium dodecanuclear acetate cluster and a minute amount of water as an additive, affords high- quality MOFs in less than 1 h of milling, with minimal requirements for workup processing and eliminating the need for conventional hazardous solvents, such as dimethylformamide. Moreover, the use of a dodecanuclear zirconium acetate precursor circumvents the need for modulators resulting in acetic acid as the only byproduct of the reaction, which does not harm these acid-resistant materials. The porosity, thermal and chemical stability, as well as catalytic activity of mechanochemically prepared Zr-based MOFs are similar to those of solvothermally synthesized counterparts. Finally, the synthesis is readily applicable on a 10 g scale by using a planetary mill, and is also performed by solid-state flow synthesis using twin-screw extrusion (TSE), affording more than 100 g of catalytically active UiO-66-NH2 material in a continuous process at a rate of 1.4 kg/h.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

POVEZANOST RADA