TiO₂ (B) nanosheets/GO (graphene oxide) hybrids are considered to be outstanding performance photocatalysts for high efficiency of H₂ evolution. However, they still suffer severe challenges during the synthetic processes, such as a large amount of the capping agents adhering on the surface and easy occurrence of aggregation. To figure out these obstacles, Ar plasma treatment as a modified method in this study not only enable the TiO₂ (B) nanosheets distributed uniformly on the GO sheets but also engineer defects within TiO₂ (B) nanosheets to significantly improve the photocatalytic activity for the water splitting. The hydrogen evolution rate of the TiO_2-x (B)/GO sheets is 1.4 times higher compared with that of original TiO₂ (B)/GO sheets without Ar plasma treatment. The improved photocatalytic properties were owing to the synergetic effects of oxygen vacancies and the heterojunction between GO and TiO₂ (B), which can promote the visible light utilization and accelerate separation and transportation of photogenerated electron-holes. This study can provide a facile pathway to prepare the two-dimensional hybrid photocatalysts with high photocatalytic H₂ activity.

TiO ₂（B）纳米片/ GO（氧化石墨烯）杂化物被认为是高效的H ₂析出性能优异的光催化剂。然而，它们在合成过程中仍然遭受严峻挑战，例如大量的封端剂粘附在表面上并且容易发生聚集。为了解决这些障碍，在本研究中，作为改进方法的Ar等离子体处理不仅使TiO ₂（B）纳米片均匀地分布在GO片上，而且还对TiO ₂（B）纳米片中的缺陷进行了工程设计，从而显着提高了TiO ₂（B）纳米片的光催化活性。水分裂。TiO _{2- x}的析氢速率（B）/ GO片材比未经Ar等离子处理的原始TiO ₂（B）/ GO片材高1.4倍。由于氧空位和GO与TiO ₂（B）之间的异质结的协同作用，改善了光催化性能，可促进可见光的利用并加速光生电子空穴的分离和传输。该研究可为制备具有高光催化H ₂活性的二维杂化光催化剂提供简便的途径。