A Facile Aerobic Calcination Synthesis of Porous Oxygen‐Doped g‐C3N4 with High Adsorption Performance and Efficient Photocatalytic Activity

Abstract In this study, porous oxygen‐doped graphitic carbon nitride (g‐C 3 N 4 ) was successfully prepared via a facile aerobic calcination method using urea as the precursor. By adjusting the heating rate, the micro structural and the optical properties of this material were investigated. A series of characterizations indicate that the low heating rate is conducive to obtaining the g‐C 3 N 4 possessing layered porous structure and large specific surface area. Meanwhile, it was found that narrower band gap (2.48 eV) and more effective carriers separation efficiency (2.54 ns) can be achieved by introducing oxygen dopants into the g‐C 3 N 4 , which is beneficial to the improvement of the photocatalytic performance. Additionally, the methylene blue (MB) wastewater degradation experiment was explored by using the porous oxygen‐doped g‐C 3 N 4 . It was demonstrated that the g‐C 3 N 4 synthesized at low heating rate shows superior efficiency (99.1 %) for MB wastewater degradation treatment than the one synthesized at high heating rate (92.6 %). Thus, the porous oxygen‐doped g‐C 3 N 4 obtains at low heating rate by aerobic calcination approach exhibits superior efficiency for dyeing wastewater treatment.