AI Article Synopsis
- Researchers synthesized sulfur-doped TiO and red TiO nanoparticles using industrial TiOSO and melamine, achieving a low bandgap of 2.10 eV for improved visible light absorption.
- Theoretical calculations indicated that sulfur doping significantly lowers the formation and substitution energy of nitrogen-doped TiO, enhancing its properties, especially at high nitrogen-to-titanium ratios.
- The resulting red TiO showed high photocatalytic activity for degrading dyes like rhodamine B and methylene blue, suggesting an effective strategy for developing TiO with better light absorption capabilities.
Article Abstract
At present, it is still difficult to significantly reduce the bandgap of TiO to promote its visible light absorption. Herein, we first synthesized sulfur-doped TiO from industrial TiOSO and then successfully synthesized red TiO nanoparticles by calcination with the N source melamine. Theoretical calculations show that predoped S could markedly decrease the formation energy and substitution energy of N-doped TiO, especially in high N/Ti ratios. The red TiO nanoparticles have a low bandgap (2.10 eV) and exhibit remarkable visible light absorption capacity. Electron paramagnetic resonance measurements show that the red TiO has abundant oxygen vacancies and Ti. The synergetic effect of Ti, oxygen vacancies, and nonmetallic element doping leads to the bandgap of TiO significantly being reduced. In addition, the red TiO exhibits great photocatalytic activity in the visible light degradation of rhodamine B (Rh.B) and methylene blue (MB). This study provides a new idea for the preparation of TiO with high visible light absorption.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11696428 | PMC |
| http://dx.doi.org/10.1021/acsomega.4c09262 | DOI Listing |
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