Nitrogen-Doped TiO2 Photocatalyst Prepared by Mechanochemical Method: Doping Mechanisms and Visible Photoactivity of Pollutant Degradation
Nitrogen-doped TiO2 (N/TiO2) photocatalysts were prepared using a mechanochemical method with raw amorphous TiO2 as precursors and various nitrogenous compounds doses (NH4F, NH4HCO3, NH3·H2O, NH4COOCH3, and CH4N2O). The photocatalysts were characterized by X-ray diffraction (XRD), X-ray photoelectro...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2012/960726 |
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| author | Yu-Chao Tang Xian-Huai Huang Han-Qing Yu Li-Hua Tang |
| author_facet | Yu-Chao Tang Xian-Huai Huang Han-Qing Yu Li-Hua Tang |
| author_sort | Yu-Chao Tang |
| collection | DOAJ |
| description | Nitrogen-doped TiO2 (N/TiO2) photocatalysts were prepared using a mechanochemical method with raw amorphous TiO2 as precursors and various nitrogenous compounds doses (NH4F, NH4HCO3, NH3·H2O, NH4COOCH3, and CH4N2O). The photocatalysts were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), thermal gravimetric-differential thermal analysis (TG-DTA), and UV-Vis diffuse reflection spectra (UV-Vis-DRS). Their photocatalytic activities were evaluated with the degradation of p-nitrophenol and methyl orange under UV or sunlight irradiation. The catalysts had a strong visible light absorption which correspond to doped nitrogen and consequent oxygen deficient. The results of photocatalytic activity showed the visible light adsorption mechanisms, as the doped nitrogen species gave rise to a mid-gap level slightly above the top of the (O-2p) valence band, but not from the mixed band gap of the N-2p and O-2p electronic levels. |
| format | Article |
| id | doaj-art-4949dfafa23f4c44b9d0fc86c1894aec |
| institution | OA Journals |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-4949dfafa23f4c44b9d0fc86c1894aec2025-08-20T02:05:52ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2012-01-01201210.1155/2012/960726960726Nitrogen-Doped TiO2 Photocatalyst Prepared by Mechanochemical Method: Doping Mechanisms and Visible Photoactivity of Pollutant DegradationYu-Chao Tang0Xian-Huai Huang1Han-Qing Yu2Li-Hua Tang3Laboratory of Water Pollution Control and Wastewater Reuse, Department of Environmental Engineering, Anhui University of Architecture, Hefei 230022, ChinaLaboratory of Water Pollution Control and Wastewater Reuse, Department of Environmental Engineering, Anhui University of Architecture, Hefei 230022, ChinaSchool of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, ChinaLaboratory of Water Pollution Control and Wastewater Reuse, Department of Environmental Engineering, Anhui University of Architecture, Hefei 230022, ChinaNitrogen-doped TiO2 (N/TiO2) photocatalysts were prepared using a mechanochemical method with raw amorphous TiO2 as precursors and various nitrogenous compounds doses (NH4F, NH4HCO3, NH3·H2O, NH4COOCH3, and CH4N2O). The photocatalysts were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), thermal gravimetric-differential thermal analysis (TG-DTA), and UV-Vis diffuse reflection spectra (UV-Vis-DRS). Their photocatalytic activities were evaluated with the degradation of p-nitrophenol and methyl orange under UV or sunlight irradiation. The catalysts had a strong visible light absorption which correspond to doped nitrogen and consequent oxygen deficient. The results of photocatalytic activity showed the visible light adsorption mechanisms, as the doped nitrogen species gave rise to a mid-gap level slightly above the top of the (O-2p) valence band, but not from the mixed band gap of the N-2p and O-2p electronic levels.http://dx.doi.org/10.1155/2012/960726 |
| spellingShingle | Yu-Chao Tang Xian-Huai Huang Han-Qing Yu Li-Hua Tang Nitrogen-Doped TiO2 Photocatalyst Prepared by Mechanochemical Method: Doping Mechanisms and Visible Photoactivity of Pollutant Degradation International Journal of Photoenergy |
| title | Nitrogen-Doped TiO2 Photocatalyst Prepared by Mechanochemical Method: Doping Mechanisms and Visible Photoactivity of Pollutant Degradation |
| title_full | Nitrogen-Doped TiO2 Photocatalyst Prepared by Mechanochemical Method: Doping Mechanisms and Visible Photoactivity of Pollutant Degradation |
| title_fullStr | Nitrogen-Doped TiO2 Photocatalyst Prepared by Mechanochemical Method: Doping Mechanisms and Visible Photoactivity of Pollutant Degradation |
| title_full_unstemmed | Nitrogen-Doped TiO2 Photocatalyst Prepared by Mechanochemical Method: Doping Mechanisms and Visible Photoactivity of Pollutant Degradation |
| title_short | Nitrogen-Doped TiO2 Photocatalyst Prepared by Mechanochemical Method: Doping Mechanisms and Visible Photoactivity of Pollutant Degradation |
| title_sort | nitrogen doped tio2 photocatalyst prepared by mechanochemical method doping mechanisms and visible photoactivity of pollutant degradation |
| url | http://dx.doi.org/10.1155/2012/960726 |
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