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Acesulfame K Photodegradation over Nitrogen-Doped $TiO_{2}$
| Content Provider | MDPI |
|---|---|
| Author | Pstrowska, Katarzyna Czapor-Irzabek, Hanna Borowiak, Daniel Burchacka, Ewa |
| Copyright Year | 2021 |
| Description | Acesulfame K is a zero-calorie alternative to sugar used worldwide. There is contradictory information on the toxicity of the compound, but its accumulation in the aquatic environment is undeniable. In this study, one-pot sol-gel synthesis was used to obtain nitrogen-doped $TiO_{2}$ photocatalysts. Doping up to 6.29 wt % of nitrogen caused an increase in the surface area of the catalysts (48.55–58.23 $m^{2}∙g^{−1}$) and a reduction of the $pH_{PZC}$ value (5.72–5.05). Acesulfame K photodegradation was tested at the initial concentration of 20–100 ppm and the catalyst concentration at the level of 1 $g∙L^{−1}$. Compared to the pure anatase, 4.83–6.29 wt % nitrogen-doped $TiO_{2}$ showed an effective photodegradation of Acesulfame K. Ninety percent molecule removal was obtained after ~100 min, ~90 min, and ~80 min for initial concentrations of 20 ppm, 50 ppm, and 100 ppm, respectively. The increased activity of the catalysts is due to the modification of the $TiO_{2}$ lattice structure and probably the limitation of the photogenerated electron/hole charge carrier recombination. It was shown that the electrostatic interactions between Acesulfame K and the catalyst surface play an important role in the photodegradation efficiency. |
| Starting Page | 1193 |
| e-ISSN | 20734344 |
| DOI | 10.3390/catal11101193 |
| Journal | Catalysts |
| Issue Number | 10 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-09-30 |
| Access Restriction | Open |
| Subject Keyword | Catalysts Environmental Engineering Water Science and Technology Photocatalysis Sweetener Wastewater Treatment Non-metal Doping Photocatalytic Oxidation |
| Content Type | Text |
| Resource Type | Article |
