The sized controlled synthesis of MIL-101(Cr) with enhanced CO2 adsorption property

Abstract MIL-101(Cr), a well-known chromium-benzenedicarboxylate metal organic framework with huge porosity, has been facile synthesized with particle sizes from micron-size to nano-size by using different additives as modifier. For MIL-101(Cr) synthesis in general, the addition of a modifier is a common method to adjust the morphology and improve the properties of the products. The effect of additives was thoroughly investigated in the synthesis of MIL-101(Cr), and among these additives, NaOH could largely increase the porosity (SBET > 4000 m2/g) of the product with particle diameter around 87 nm. Furthermore, the nano-sized MIL-101(Cr) showed enhanced CO2 adsorption property (5.77 mmol/g), which is nearly twice as much as that of bulk MIL-101(Cr).