AI Article Synopsis
- Developing efficient photocatalysts for the removal of phthalate esters (PAEs) in water is essential for environmental science, but current methods often overlook the degradation characteristics of PAEs.
- The researchers introduced "Bi-Br" vacancy pair defects in a BiOBr photocatalyst, enhancing its ability to degrade PAEs by improving both charge separation and the adsorption of PAEs on the catalyst surface.
- The study highlights how defect engineering can lead to more effective photocatalysts, offering new approaches for treating PAEs in water.
Article Abstract
Developing new photocatalysts to achieve efficient removal of phthalate esters (PAEs) in water is an important research task in environmental science. However, existing modification strategies for photocatalysts often focus on enhancing the efficiency of material photogenerated charge separation, neglecting the degradation characteristics of PAEs. In this work, we proposed an effective strategy for the photodegradation process of PAEs: introducing vacancy pair defects. We developed a BiOBr photocatalyst containing "Bi-Br" vacancy pairs, and confirmed that it has an excellent photocatalytic activity in removing phthalate esters (PAEs). Through a combination of experimental and theoretical calculations, it is proved that "Bi-Br" vacancy pairs can not only improve the charge separation efficiency, but also alter the adsorption configuration of O, thus accelerating the formation and transformation of reactive oxygen species. Moreover, "Bi-Br" vacancy pairs can effectively improve the adsorption and activation of PAEs on the surface of samples, surpassing the effect of O vacancies. This work enriches the design concept of constructing highly active photocatalysts based on defect engineering, and provides a new idea for the treatment of PAEs in water.
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| http://dx.doi.org/10.1016/j.jhazmat.2023.132008 | DOI Listing |
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