Novel PO codoped g-C3N4 with large specific surface area: Hydrothermal synthesis assisted by dissolution–precipitation process and their visible light activity under anoxic conditions

摘要: Abstract Novel P O codoped g-C 3 N 4 with large specific surface area is hydrothermal synthesized assisted by dissolution–precipitation process. The XRD, UV–vis, SEM and PL results indicate that the introduction of phosphorus oxygen enhances graphitic carbon nitride (from 12.8 to 92.5 m 2  g −1 ), restrains crystal growth, decreases band gap energy 2.68 2.51 eV) increases separation efficiency photogenerated electrons holes, which anoxic photocatalytic RhB degradation constants approximately 27 times under visible light. Oxygen doping not only promotes adsorption ability reactant but also captures produce holes for condition. This study provides new insight into design fabrication oxygen-free photocatalysts.