Z-scheme photocatalytic NO removal on a 2D/2D iodine doped BiOIO3/g-C3N4 under visible-light irradiation

Beibei Wang, Dongyun Chen ^*（陈冬赟）, Najun Li , Qingfeng Xu , Hua Li , Jinghui He , Jianmei Lu ^*（路建美）

Collaborative Innovation Center of Suzhou Nano Science and Technology, College of Chemistry Chemical Engineering and Materials Science Soochow University, 199 Ren’ai Road, Suzhou 215123, PR China

Journal of Colloid and Interface Science 576 (2020) 426--434

We report an unique 2D/2D Iodine doped BiOIO₃/g-C₃N₄ heterojunction was successfully prepared. The iodine doped BiOIO₃ was prepared by a simple solvent exchange method and combined with g-C₃N₄ by solvothermal method. The prepared photocatalyst has potential application value in the future due to its excellent stable cycle property. BiOIO₃ nanoplates and g-C₃N₄ nanosheets form a close interfacial contact directly, so the catalyst has higher charge transport efficiency and wide visible range due to the introduction of iodide ions. Synergistic heterojunction exhibits strong photocatalytic activity for degradation of NO at ppb-level under visible light, of which 30% Iodine doped BiOIO₃/g-C₃N₄ can achieve a maximum removal rate of 57% for NO. According to the experimental results of ESR and other experiments, a more complex Z-scheme photocatalytic mechanism is proposed, which has stronger redox ability than the traditional mechanism.

链接：https://www.sciencedirect.com/science/article/pii/S002197972030641X