| Summary: | In this study, novel photocatalysts LaAO<sub>x</sub>/g-C<sub>3</sub>N<sub>4</sub> (A = V, Fe, Co) were prepared by the hydrothermal method, through which LaAO<sub>x</sub> and g-C<sub>3</sub>N<sub>4</sub> were mixed and ultrasonically oscillated to gain heterojunction catalysts. All the samples were characterized by XRD, SEM, FT-IR, XPS, DRS, and PL to ensure the successful integration of LaAO<sub>x</sub> with g-C<sub>3</sub>N<sub>4</sub>. The obtained results showed that LaAO<sub>x</sub>/g-C<sub>3</sub>N<sub>4</sub> (A = V, Fe, Co) could effectually improve the separation efficiency of photogenerated carriers during the photodegradation process, thus improving the photodegradation efficiency, while among them, LaFeO<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> showed the best photocatalytic performance and degradation of norfloxacin under visible light, reaching up to 95% in 180 min, which was 9.32 times higher than pristine g-C<sub>3</sub>N<sub>4</sub>. From the discussed results above, the possible mechanism of the photodegradation process was put forward. This study supplies a promising method to gain g-C<sub>3</sub>N<sub>4</sub>-based photocatalysts for antibiotics removal.
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