Herein, we developed a facile approach to fabricate oxygen vacancies-mediated TiO₂ (OVs-TiO₂) nanocrystals via an intrinsic carbon-doping induced strategy. The intrinsic carbon-doped TiO₂ nanocrystals were firstly synthesized by water-controlled-releasing solvothermal (WCRS) process using ethanol, acetic acid and titanium tetraisopropoxide (TTIP) as precursors. The carbon-doped TiO₂ was calcined at 325 °C under N₂ atmosphere to introduce the OVs. The obtained OVs-TiO₂ displayed outstanding photocatalytic NO removal performance under visible light irradiation (λ˃510 nm), in comparison with the commercial P25. With the aid of DFT calculations, we revealed that the intrinsic carbon-doping was beneficial for the formations of OVs in carbon-doped TiO₂. Moreover, the OVs played crucial roles in improving light absorption, facilitating charge separation, and activating surface reactions to enhance the photocatalytic NO removal performance.

在这里，我们开发了一种通过固有的碳掺杂诱导策略制造氧空位介导的TiO ₂（OVs-TiO ₂）纳米晶体的简便方法。首先以乙醇，乙酸和四异丙醇钛（TTIP）为前驱体，通过水控释溶剂热（WCRS）工艺合成了本征碳掺杂的TiO ₂纳米晶体。将碳掺杂的TiO ₂在N ₂气氛下于325°C煅烧以引入OV。所得OVs-TiO ₂与商用P25相比，在可见光照射下（λ˃510nm）具有出色的光催化NO去除性能。借助DFT计算，我们发现固有的碳掺杂有利于碳掺杂的TiO ₂中OV的形成。此外，OVs在改善光吸收，促进电荷分离和激活表面反应以增强光催化NO去除性能方面起着关键作用。