Fig. 1: Toluene-induced crystal phase transition in various ZIF-8 variants.
From: High-flux and anti-fouling membrane distillation membrane with VOC capture ability enabled by ZIF-8
a PXRD Rietveld refinement results of primitive ZIF-8-2. The inset presents the relative phase composition ratios of the three crystalline phases. b Toluene vapor sorption of ZIF-8-1, ZIF-8-2, and ZIF-8-3 at 25 °C. c Toluene vapor sorption of ZIF-8-1, ZIF-8-2, and ZIF-8-3 at 60 °C. d Crystal phase composition ratios of pristine, toluene-saturated, and reactivated states of ZIF-8-1, ZIF-8-2, and ZIF-8-3 determined by PXRD Rietveld refinement. e Binding energies of toluene in three crystal phases of ZIF-8 using periodic DFT calculations. f Schematic diagram of toluene-induced transformation of ZIF-8 from the I-43m phase to the Cm phase, where the Cm phase exhibits greater stiffness compared to I-43m.
