A Potential Site for Trapping Photogenerated Holes on Rutile TiO2 Surface as Revealed by EPR Spectroscopy: An Avenue for Enhancing Photocatalytic Activity
| العنوان: | A Potential Site for Trapping Photogenerated Holes on Rutile TiO2 Surface as Revealed by EPR Spectroscopy: An Avenue for Enhancing Photocatalytic Activity |
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| المؤلفون: | Neeruganti O. Gopal, Shyue-Chu Ke, Hsin-Hsi Lo, Shiann-Cherng Sheu |
| المصدر: | Journal of the American Chemical Society. 132:10982-10983 |
| بيانات النشر: | American Chemical Society (ACS), 2010. |
| سنة النشر: | 2010 |
| مصطلحات موضوعية: | Titanium, Light, Surface Properties, Chemistry, Tio2 nanoparticles, Electron Spin Resonance Spectroscopy, General Chemistry, Trapping, Photochemical Processes, Photochemistry, Biochemistry, Catalysis, law.invention, Hydrogen atmosphere, Colloid and Surface Chemistry, Rutile, law, Photocatalysis, Molecular oxygen, Electron paramagnetic resonance |
| الوصف: | Rutile TiO(2) nanoparticles with new sites for effectively trapping photogenerated holes have been prepared by reacting the TiO(2) nanoparticles prepared in hydrogen atmosphere with molecular oxygen at elevated temperatures. The observed g values and the occurrence of (47)Ti and (49)Ti octet hyperfine pattern allowed us to assign this EPR active center to surface oxygen centered anion radical with two coordinating titaniums. The effective trapping of photogenerated holes by these new sites inhibits the electron-hole recombination and results in an enhanced photocatalytic activity under visible light by a factor of 2.5 compared with samples prepared parallel in air. Oxidation of reduced TiO(2) apparently is a simple low-cost and promising route for improving the photoactivity of TiO(2). |
| تدمد: | 1520-5126 0002-7863 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59733d556d1c95471f74efd0566a8508Test https://doi.org/10.1021/ja909901fTest |
| رقم الانضمام: | edsair.doi.dedup.....59733d556d1c95471f74efd0566a8508 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15205126 00027863 |
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