• The multiple thermal treatments strategy is proposed for preparing the hollow oxygen-incorporated g-C₃N₄ nanosheets (OCN).

• Oxygen-adsorption creates a lot of defects to the formation of hollow and monolayered structure, while oxygen-doping reduces the band gap significantly.

• OCN exhibits stable and high photocatalytic hydrogen evolution with increased surface area, enhanced charge transport, and reduced band gap.

中文翻译：

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用于高效光催化析氢的掺氧石墨氮化碳多孔纳米片的能带工程和形态控制

• 提出了多种热处理策略来制备空心掺氧gC ₃ N ₄纳米片（OCN）。

• 氧吸附对中空和单层结构的形成产生了很多缺陷，而氧掺杂显着降低了带隙。

• OCN 表现出稳定且高的光催化氢析出，具有增加的表面积、增强的电荷传输和减小的带隙。