Synergistic photocatalytic ozonation of eliminating chloramphenicol over a 2D MXene-derived heterojunction

Herein, we demonstrate the first example of applying 2D MXene hetero-interfaced nanocomposites for a photocatalytic ozonation of chloramphenicol (CAP). The hierarchical 2D/2D Bi2MoO6/Ti3C2Tx MXene (BMT) hybrid enables a high CAP removal ratio of 95 % within 60 min that outperforms bare Bi2MoO6. Evidences from theoretical calculations and experimental findings prove that the adsorption capability of O3/O2 onto BMT surfaces is elevated and the electron transfer process is accelerated by virtue of hybridization with Ti3C2Tx, thus facilitating the generation of reactive oxygen species (ROSs) including •OH, 1O2 and •O2−. Such elaborate design provides a novel type of robust and cost-effective materials adapted for integrated advanced oxidation processes (AOPs) in highly efficient removal of refractory organic substances in water environments.