https://doi.org/10.3390/en15093473
“Although MOFs show very promising physical and chemical properties for various applications, their properties can be further improved by several means. Overall, studies published so far highlight the drawbacks of MOFs’ potential practical applications. For example, some MOFs are characterized by poor chemical stability, low yields, low thermal and hydrolytic stability, potentially high production costs, and large pore space, which does not favor gas molecules storage [35,36]. To improve CO2 adsorption, different MOF modification approaches including presynthesis and postsynthesis are used. The main criterion for using MOF-composites is the synergistic effects of MOF and carrier material on their adsorption behaviors. To date, various materials have been combined with MOFs to improve CO2 adsorption properties, which can be divided into following classes [37], which include small molecules, such as ionic liquids (ILs) [38,39,40]; polymeric materials, such as polyethyleneimine (PEI) [41,42]; flat materials, such as graphene [43], graphene oxide [44,45,46], aminoclays [25] etc.; and spatial materials such as carbon nanotubes (CNTs) [37,47]. Overall, MOFs and MOF-composites have found applications in catalysts, supercapacitors, adsorbents, sensors, environmental protection, drug delivery, etc. [48].”