Science Advances

Supplementary Materials

This PDF file includes:

  • note S1. Gas permeation tests.
  • note S2. Fabrication of bullet-shaped single-nanochannel PET membranes.
  • note S3. Fabrication of single-nanochannel supported ZIF-8/PET membrane.
  • note S4. MD simulations.
  • note S5. Fabrication of single-nanochannel supported ZIF-7/PET membrane.
  • note S6. Fabrication of single-nanochannel supported UiO-66/PET membrane.
  • fig. S1. Structures of a biological ion channel and subnanometer ZIF-8 pores.
  • fig. S2. Fabrication process of the ZIF-8/GO/AAO membrane.
  • fig. S3. SEM characterization of the AAO support before and after growth of ZIF-8/GO membrane.
  • fig. S4. Gas permeation and selectivity of the ZIF-8/GO/AAO membrane and N2 adsorption isotherms of ZIF-8 crystals.
  • fig. S5. Dependence of the ion conductance of the ZIF-8/GO/AAO membrane on the ionic diameter.
  • fig. S6. Ion transport properties of the nanoporous GO/AAO membrane.
    fig. S7. Ion transport in the single-nanochannel supported ZIF-8/PET membranewithout GO nanosheets.
  • fig. S8. Ion transport mechanism through subnanometer ZIF-8 pores.
  • fig. S9. Calculated ion velocities in ZIF-8 pores under an electric field of 0.5 V/Å.
  • fig. S10. Radial distribution function g(r) of water molecules around Li+ and K+ in ZIF-8 calculated under different van der Waals forces.
  • fig. S11. Cycle performance and stability of the ZIF-8/GO membrane.
  • fig. S12. Fabrication and characterization of the ZIF-7/PET and UiO-66/PET membranes.
  • fig. S13. Ion transport properties of the ZIF-7/PET and UiO-66/PET membranes.
  • fig. S14. Ion transport properties of the multichannel PET membranes with a channel density of 108 cm−2.
  • table S1. Conductance values of the AAO supports before and after growth of ZIF-8/GO membranes measured in 0.1 M MCl solutions (M+ = Li+, Na+, K+, and Rb+).
  • table S2. Studied ionic species: ionic diameter (d), hydrated ionic diameter (dH), hydration enthalpy, and limited ion conductivity.
  • table S3. Calculated ion mobility in bulk solution and in ZIF-8 (in unit of 10−7 m2 V−1 s−1).
  • table S4. Ion selectivity ratios of the three reproduced ZIF-8/GO/AAO membranes and three reproduced UiO-66/PET membranes.
  • table S5. Dependence of the ion selectivity on the pore diameter of the synthetic membranes.
  • table S6. Comparison of the ion selectivity of the ZIF-8 membranes with other synthetic membranes.
  • References (38–50)

Download PDF

Files in this Data Supplement: