Pyrolysis of confined MOFs in mesoporous SiO2 nanoreactors for removal of antibiotic from water

The detrimental effects on human health and ecological security caused by antibiotic pollution of the aquatic environment have attracted widespread attention. The development of more effective materials is urgently needed for antibiotic removal. In this paper, a mesoporous composite of SiO 2 /UIO-66–400 was prepared via a solvothermal reaction. The synthesized SiO 2 /UIO-66–400 has a good recycling performance (four times). Adsorption kinetics can be observed that the adsorption equilibrium can be reached within 120 min. At a pH of 7.00, a temperature of 5°C and an adsorbent dose of 0.25 mg·mL −1 , the adsorption capacity of the SiO 2 /UIO-66–400 for 200 mg·L -1 ofloxacin (OFL) can be up to 77.60 mg·g −1 . The interactions at the adsorbent-adsorbate interface are multifaceted, encompassing scenarios of monolayer and multilayer adsorption. Several attractive forces such as pore filling, electrostatic interaction, hydrogen bonding, and π-π attraction are identified as the primary drivers of antibiotic from water.