Furthermore,
even when higher molar ratios of Na and Li salts to ZIF-8 (from
2.0 to 5.0) were employed, the ZIF-8 structure still survived
(Figures 2 and 3). However, the XRD peak intensities of ZIF-8
decrease with increasing the molar ratios of salts to ZIF-8. This
occurred because the increase in the molar ratio of salt to ZIF-8
reduced the absolute content of ZIF-8 in the sample.