Ion-Exchanged ZIF-67 Synthesized by One-Step Method for Enhancement of CO₂ Adsorption

Table 4

The pH_PZC values of the parent ZIF-67 and ion-exchanged ZIF-67 before and after CO₂ adsorption.

Sample	pHPZC values
	Before CO2 adsorption	After CO2 adsorption
Parent	6.92	5.36
Li-post-5	7.79	5.10
Na-post-5	7.51	5.63
Li-as-5	9.26	5.27
Na-as-5	8.83	5.49