Semiconductor photocatalysts incorporating oxygen vacancies (OVs) have garnered significant attention and research efforts in the field of environmental remediation, but the methods for regulating oxygen vacancies are more demanding. In this work, a combination of UV irradiation and hydrothermal methods was used to create oxygen vacancy-rich Bi₂O₂(OH)NO₃ (BON) photocatalysts, and the presence of oxygen vacancies was revealed by various experimental measurements and theoretical calculations, which regulate the band structure and optimizes the photogenerated carrier behavior of BON-30. The photocatalytic degradation performance of BON was subsequently investigated using the organic dye rhodamine B (RhB) under visible light illumination. The improved activity of BON-30 can be attributed to factors such as oxygen vacancies and reactive radicals O₂^–, which contribute to enhanced visible light absorption, narrowed band gap and reduced photoelectron-hole complexation ability. In addition, the stability of this photocatalyst shows great potential for application. This strategy provides a simple way to explore more efficient photocatalysts for environmental remediation.

含有氧空位（OV）的半导体光催化剂在环境修复领域引起了极大的关注和研究工作，但调节氧空位的方法要求更高。在这项工作中，结合使用紫外线照射和水热方法来制备富含氧空位的Bi ₂ O ₂ (OH)NO ₃（BON）光催化剂，通过各种实验测量和理论计算揭示了氧空位的存在，这调节了BON-30的能带结构并优化了光生载流子行为。随后使用有机染料罗丹明 B (RhB) 在可见光照射下研究了 BON 的光催化降解性能。BON-30 活性的提高可归因于氧空位和活性自由基O ₂ ^–等因素，这有助于增强可见光吸收，缩小带隙并降低光电子空穴络合能力。此外，该光催化剂的稳定性显示出巨大的应用潜力。该策略为探索更有效的环境修复光催化剂提供了一种简单的方法。