Construction of a highly efficient g-CN-based photocatalyst for hydrogen generation is promising but still challenging. In this work, the 1T-phase MoS nanosheets are prepared by using supercritical carbon dioxide, which are utilized to build 2D-2D g-CN/MoS heterojunction for solar H generation. In addition, MoS is also severed as the precursor of heteroatom to dope into 2D g-CN nanosheets for forming monatomic Mo-doped g-CN-based photocatalyst. The obtained single atomic Mo-doped 2D/2D g-CN/MoS heterojunction exhibits a boosted H production of 2222.6 μmol g h with the apparent quantum yield of 9.08%, far exceeding the primitive one. Theoretical calculations and experimental results demonstrate that Mo-PCN/PMS composite possess a Mo-N configuration, and the synergy of three promoted strategies, including stripping, doping, and heterojunction plays vital roles in boosting the catalytic activity. This study implies that the integrated g-CN-based composite has great potential application in the field of photocatalytic hydrogen evolution.

中文翻译：

---

将构型、掺杂和异质结集成到 g-C3N4 基光催化剂中用于水分解

构建高效的 g-CN 基光催化剂用于制氢是有前景的，但仍然具有挑战性。在这项工作中，利用超临界二氧化碳制备了1T相MoS纳米片，用于构建用于太阳能发电的2D-2D g-CN/MoS异质结。此外，MoS也被切断作为杂原子的前体，掺杂到2D g-CN纳米片中，形成单原子Mo掺杂g-CN基光催化剂。所获得的单原子Mo掺杂2D/2D g-CN/MoS2异质结的产氢量达到2222.6 μmol g·h，表观量子产率为9.08%，远远超过原始结构。理论计算和实验结果表明，Mo-PCN/PMS复合材料具有Mo-N构型，剥离、掺杂和异质结等三种推广策略的协同作用对于提高催化活性起着至关重要的作用。这项研究表明集成的g-CN基复合材料在光催化析氢领域具有巨大的应用潜力。