| Summary: | A novel AgBr/Ag<sub>2</sub>MoO<sub>4</sub>@InVO<sub>4</sub> composite photocatalyst with different heterojunction structures was successfully constructed by compounding InVO<sub>4</sub> with Ag<sub>2</sub>MoO<sub>4</sub> and AgBr. According to the degradation, antibacterial and free radical trapping data, the photocatalytic antibacterial and antifouling activities of AgBr/Ag<sub>2</sub>MoO<sub>4</sub>@InVO<sub>4</sub> composite were evaluated, and the corresponding photocatalytic reaction mechanism was proposed. Adding AgBr/Ag<sub>2</sub>MoO<sub>4</sub>@InVO<sub>4</sub> composite, the degradation rate of ciprofloxacin (CIP) achieved 95.5% within 120 min. At the same time, the antibacterial rates of <i>Escherichia coli</i> (<i>E. coli</i>), <i>Staphylococcus aureus</i> (<i>S. aureus</i>) and <i>Pseudomonas aeruginosa</i> (<i>P. aeruginosa</i>) achieved 99.99%. The AgBr/Ag<sub>2</sub>MoO<sub>4</sub>@InVO<sub>4</sub> composite photocatalyst showed promising usage in photocatalytic antibacterial and purification areas.
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