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Enhanced Photocatalytic Ozonation Using Modified TiO2 With Designed Nucleophilic and Electrophilic Sites.
- Source :
-
Chemistry - A European Journal . Jul2024, p1. 10p. 6 Illustrations, 2 Charts. - Publication Year :
- 2024
-
Abstract
- Photocatalytic ozonation is considered to be a promising approach for the treatment of refractory organic pollutants, but the design of efficient catalyst remains a challenge. Surface modification provides a potential strategy to improve the activity of photocatalytic ozonation. In this work, density functional theory (DFT) calculations were first performed to check the interaction between O3 and TiO2−OH (surface hydroxylated TiO2) or TiO2−F (surface fluorinated TiO2), and the results suggest that TiO2−OH displays better O3 adsorption and activation than does TiO2−F, which is confirmed by experimental results. The surface hydroxyl groups greatly promote the O3 activation, which is beneficial for the generation of reactive oxygen species (ROS). Importantly, TiO2−OH displays better performance towards pollutants (such as berberine hydrochloride) removal than does TiO2−F and most reported ozonation photocatalysts. The total organic carbon (TOC) removal efficiency reaches 84.4 % within two hours. This work highlights the effect of surface hydroxylation on photocatalytic ozonation and provides ideas for the design of efficient photocatalytic ozonation catalysts. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09476539
- Database :
- Academic Search Index
- Journal :
- Chemistry - A European Journal
- Publication Type :
- Academic Journal
- Accession number :
- 179156578
- Full Text :
- https://doi.org/10.1002/chem.202401380