Alkali activation of halloysite for adsorption and release of ofloxacin

- Alkali activation increases pore volume, pore size distribution of halloysite, and then the adsorption capacity for OFL.
- OFL can be adsorbed onto the external surface halloysite via electrostatic interaction or enter into the lumen of halloysite via complexation with amorphous Al(III) in the lumen of halloysite.
- Alkali activation can prolong the release of the adsorbed OFL, and was proved to be an effective approach to improve adsorption and release for cationic drugs.