Studies on metal organic frameworks incorporated composite materials

Abstract

Porous materials are widely studied in many of the laboratories around the world for diverse applications ranging from adsorption to catalysis Due to their distinct advantages such as surface area porosity porous solids occupy a place almost everywhere Hierarchically structured porous materials are a class of three dimensional nanostructured materials These materials mimic the natural systems and show improved properties For instance combined micro mesoporosities leads to high surface area high porosity rich active sites accessibility short diffusion paths and low mass transport These properties make them potential candidates for many applications which include Dye Sensitized Solar Cells DSSC and supercapacitors To synthesize hierarchically structured porous materials one simple strategy is combining two materials with different pore sizes Metal Organic Framework MOF and aerogel are nanostructured porous materials; MOFs are classified as microporous pore diameter 2 nm and aerogels are mesoporous pore diameter 2 50 nm Metal Organic Framework Aerogel Composites MOFACs are a new class of emerging materials which find wide applications in field of catalysis energy and gas adsorption MOF is formed by the self assembly of metal ions clusters and organic ligands The organic ligand acts as a basic building block of MOF formation It bridges the metal sites and forms coordination thereby giant framework evolved After the benchmark works by O M Yaghi group in 1999 the interest in MOF synthesis and utilization has enormously increased Methods such as sol gel hydrothermal solvothermal electrochemical reflux microwave treatment sonochemistry and mechanochemistry are used to synthesize various MOFs The key advantages of MOF are exceptional high surface area permanent porosity chemical tailorability tunable pores