Simple synthesis of CaTiO3/g-C3N4 heterojunction for efficient photodegradation of methylene blue and levofloxacin

Calcium titanate (CaTiO 3 ) has received more and more attention due to the excellent physicochemical properties. However, in the process of photocatalysis , the photogenerated carriers are very easy to recombine. Based on this problem, g-C 3 N 4 modified CaTiO 3 photocatalyst was prepared via calcination . The properties of CaTiO 3 /g-C 3 N 4 were analyzed through XRD , SEM , XPS , UV–vis and TGA . The optimized CaTiO 3 /g-C 3 N 4 could achieve 100% and 87.7% removal rate of methylene blue (MB) and levofloxacin (LVF), respectively, under a 500 W mercury lamp illumination within 120 min. In addition, the effects of photocatalyst dosage, solution pH and co-existing ions in water on the degradation process were systematically investigated. A possible charge transmission mechanism was analyzed and the LVF degradation pathway was proposed. This work will provide a new strategy to synthesize cost-effective CaTiO 3 composites.