One-step synthesis of phosphorus/oxygen co-doped g-C3N4/anatase TiO2 Z-scheme photocatalyst for significantly enhanced visible-light photocatalysis degradation of enrofloxacin

Anatase TiO 2 nanoparticles coated with P and O co-doped g-C 3 N 4 were prepared via a single-step procedure. The resulting POCN/anatase TiO 2 demonstrated remarkable performance in the degradation of enrofloxacin (ENFX). The photocatalytic activity of this heterojunction was 28.9 and 3.71 times better than that of the CN and anatase TiO 2 , respectively. The microtopography of the POCN/anatase TiO 2 was revealed in this study. Co-doping with P and O increased the visible light adsorption capacity of the g-C 3 N 4 , whereas the anatase TiO 2 nanoparticles enhanced the adsorption properties of the ENFX and the separation of the photoinduced carriers of the POCN/anatase TiO 2 . The O 2 ·− and h + were the main reactive oxidative species in the photocatalytic degradation of ENFX. The results of the detection of H 2 O 2 and ESR confirmed that POCN/anatase TiO 2 was a type Z-scheme photocatalyst. Finally, the ENFX degradation pathways were estimated through the detection of by-products.