Formulating InVO/α-FeO Heterojunction Composites for Photocatalytic Tetracycline Hydrochloride Degradation.

This study reports the synthesis of InVO/α-FeO heterojunction photocatalysts with different stoichiometric ratios via a two-step hydrothermal synthesis reaction. The prepared photocatalysts were characterized by XRD, SEM, TEM, XPS, and other methods. The prepared composites exhibited good photocatalysis of tetracycline hydrochloride. Among the InVO/α-FeO heterojunction photocatalysts with different ratios, the InVO/0.25α-FeO photocatalyst showed the highest degradation rate for 20 mg L tetracycline hydrochloride. After three photocatalytic runs, it still exhibited excellent stability and reusability. Meanwhile, this study also found that superoxide radical anion (-O), electron (e), hydroxyl radical (·OH), and photogenerated hole (h) are the basic active substances in the photocatalytic process.