Abstract
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.
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