Facile synthesis of nano-sized MIL-101(Cr) with the addition of acetic acid

MIL-101(Cr), one of the best investigated and widely used metal-organic frameworks, has been easily synthesized with particle diameters in the range from 387(28) nm to 90(10) nm by using acetic acid as a modulator. The particle size of MIL-101(Cr) decreased with increasing acetic acid concentration. The decrease of size in high concentration of acetic acid may be explained with the efficient suppression of the framework extension. In a selected condition, MIL-101(Cr) possessing an average diameter of about 90 nm can be prepared easily and reproducibly in gram-scale, with high BET-surface areas (3200-3500 m(2)/g) and fairly good yield (60-75%). (C) 2017 Elsevier B.V. All rights reserved.