A well inter-grown ZIF-8 membrane synthesized via two-step hydrothermal synthesis on coarse alpha-Al2O3 support

作者：Yeo Zee Ying; Zhu Peng Wei; Mohamed Abdul Rahman; Chai Siang Piao^*

来源：Materials Letters, 2014, 129: 162-165.

DOI：10.1016/j.matlet.2014.05.051

• Crystal growth
• Crystal structure
• Recrystallization

Here, we report the fabrication of a well inter-grown ZIF-8 membrane on coarse alpha-Al2O3 support via a two-step hydrothermal synthesis method. The ZIF-8 seeds were initially vacuum seeded to ensure overall coverage of the voids on the alpha-Al2O3 support followed by hydrothermally treated twice for forming well inter-grown membrane. The presence of sodium formate was found to be of critical importance to enable the growth of ZIF-8 structure into a continuous membrane. This method enabled our ZIF-8 membrane to exhibit CO2 permeance of 3.49 x 1(0-)7 mol/m(2) s Pa with significant CO2/N-2 and CO2/CH4 selectivity of 3.4 and 4.0, respectively.

• 出版日期2014-8-15