Rapid evaluation of oxygen vacancies-enhanced photogeneration of the superoxide radical in nano-TiO₂ suspensions.

ABSTRACT: Reactive oxygen species (ROS) play an important role in the photocatalytic degradation of pollutants and are closely related to the surface defects of a semiconductor. However, the characterization of surface defects is very complex and a deeper understanding of them remains a great challenge. In this work, a series of nano-TiO₂ was synthesized and their optical properties due to surface defects were studied. The results showed that the surface oxygen vacancies on nano-TiO₂ can induce chemiluminescence (CL) by luminol. The greater the number of surface oxygen vacancies, the stronger the luminescence signal, and the greater the production of reactive oxygen species. Further studies revealed that the CL intensity was positively correlated with the oxygen vacancy content

SUBMITTER: Yu W 

PROVIDER: S-EPMC9055918 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature