Synthesis of nano zinc-based metal-organic frameworks under ultrasound irradiation in comparison with solvent-assisted linker exchange: Increased storage of N and CO.

Isostructural nano Zn(II)-based metal-organic frameworks (MOFs), Zn-TMU, has been synthesized by ultrasound process and solvent-assisted linker exchange (SALE). Zn(II)-MOFs were investigated as CO capture compounds. Compared with ultrasound process, the as-prepared daughter frameworks showed enhanced CO sorption capacity, ascribed to the existence of structural defects during the SALE method. This study demonstrated that the gas storage depends mainly on the quality and defects in the structure, which depends on the synthetic conditions. This study is a new report of increasing CO sorption in Zn-TMU by a SALE method.