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 (S BET > 4000 m2/g) of the product with particle diameter around 87 nm. Furthermore, the nano-sized MIL-101(Cr) showed enhanced CO 2 adsorption property (5.77 mmol/g), which is nearly twice as much as that of bulk MIL-101(Cr). Graphical abstract Unlabelled Image Highlights • A new method for synthesis of nanoparticles of the robust high-surface area MOF MIL-101(Cr) is proposed. • The particle size of MIL-101(Cr) can be facile controlled by adjusting the different kind of additives in the reaction system. • The nano-scaled MIL-101(Cr) showed much better CO 2 adsorption performance than that of bulk phase MIL-101(Cr), due to its ‘nano effect’ at low temperature. [ABSTRACT FROM AUTHOR]