Synthesis of Bifunctional Mesoporous MoO3/ZrO2 Catalyst for the Degradation of Tetracyclin

In this paper, bifunctional mesoporous MoO 3 /ZrO 2 composite was prepared by co-precipitation method using cetyltrimethylammonium bromide (CTAB) as template agent for the photodegradation of tetracyclines (TCs). In order to study the catalyst performances, catalyst was characterized via XRD, Raman, SEM, TEM, BET, and Py-IR. Results showing that the catalyst is a bifunctional acid ( B and L) mesoporous catalyst with the MoO 3 monolayer embedded in the ZrO 2 , which specific surface area (SSA) is 69.0318 m 2 /g and an average pore size is 11.6948 nm. In order to study the degradation target of the MoO 3 / ZrO 2 for TCs, photodegradation of Isotope-labeled [2H 6 ]-TC and [2H 3 ]-DOX was detected by HPLC-MS. The results showed that the target of TC and DOX was concentrated on C4 of the A ring. The difference was that TC underwent oxidative dehydrogenation of α-dimethylamino group at the C4 position of the A ring, while DOX was demethylated at the C4 of the A ring, moreover, the-NH 2 of the C1 and the -OH of C3 formed a five-membered ring structure and removed H 2 O.