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Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders
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| Zeitschriftentitel: | International Journal of Photoenergy |
|---|---|
| Personen und Körperschaften: | , , |
| In: | International Journal of Photoenergy, 2015, 2015, S. 1-12 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Hindawi Limited
|
| Schlagwörter: |
| author_facet |
Byzynski, Gabriela Ribeiro, Caue Longo, Elson Byzynski, Gabriela Ribeiro, Caue Longo, Elson |
|---|---|
| author |
Byzynski, Gabriela Ribeiro, Caue Longo, Elson |
| spellingShingle |
Byzynski, Gabriela Ribeiro, Caue Longo, Elson International Journal of Photoenergy Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders General Materials Science Renewable Energy, Sustainability and the Environment Atomic and Molecular Physics, and Optics General Chemistry |
| author_sort |
byzynski, gabriela |
| spelling |
Byzynski, Gabriela Ribeiro, Caue Longo, Elson 1110-662X 1687-529X Hindawi Limited General Materials Science Renewable Energy, Sustainability and the Environment Atomic and Molecular Physics, and Optics General Chemistry http://dx.doi.org/10.1155/2015/831930 <jats:p>The defects caused by doping are important for understanding the increased photocatalytic activities of TiO<jats:sub>2</jats:sub>:N in organic reactions and in the evaluation of OH radical production after doping. TiO<jats:sub>2</jats:sub>:N was therefore synthesized using a modified polymeric method and N doping was performed by calcination with urea. The resulting powders were characterized using field emission scanning electron microscopy, X-ray diffraction, diffuse reflectance spectroscopy, Raman spectroscopy, Fourier transformation infrared spectroscopy, and photoluminescence emission spectroscopy (PL). N doping did not alter the morphology of the nanoparticles, and the anatase phase predominated, with the retention of the rutile phase. The band gap values, superficial areas, and crystallite sizes of the powders decreased after doping. The PL results showed an additional energy level in the TiO<jats:sub>2</jats:sub>:N band gap structure as a result of TiO<jats:sub>2</jats:sub>lattice defects caused by doping. At low N contents, the powders showed continuous emissions from the blue region to the yellow region and a high N content shifted the PL emissions to the red region. These results suggest that the use of these powders could increase the efficiencies of solar cells and water-splitting processes. The photocatalytic activity of the powders under UVC illumination was confirmed for different organic dye molecules. The OH radical production did not change extensively after doping, as shown by experiments with terephthalic acid, and higher photocatalytic efficiencies in Rhodamine-B degradation under UVC illumination were achieved using the doped samples.</jats:p> Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO<sub><b>2</b></sub>Powders International Journal of Photoenergy |
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Hindawi Limited, 2015 |
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Hindawi Limited, 2015 |
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1110-662X 1687-529X |
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International Journal of Photoenergy |
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| title |
Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders |
| title_unstemmed |
Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders |
| title_full |
Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders |
| title_fullStr |
Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders |
| title_full_unstemmed |
Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders |
| title_short |
Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders |
| title_sort |
blue to yellow photoluminescence emission and photocatalytic activity of nitrogen doping in tio<sub><b>2</b></sub>powders |
| topic |
General Materials Science Renewable Energy, Sustainability and the Environment Atomic and Molecular Physics, and Optics General Chemistry |
| url |
http://dx.doi.org/10.1155/2015/831930 |
| publishDate |
2015 |
| physical |
1-12 |
| description |
<jats:p>The defects caused by doping are important for understanding the increased photocatalytic activities of TiO<jats:sub>2</jats:sub>:N in organic reactions and in the evaluation of OH radical production after doping. TiO<jats:sub>2</jats:sub>:N was therefore synthesized using a modified polymeric method and N doping was performed by calcination with urea. The resulting powders were characterized using field emission scanning electron microscopy, X-ray diffraction, diffuse reflectance spectroscopy, Raman spectroscopy, Fourier transformation infrared spectroscopy, and photoluminescence emission spectroscopy (PL). N doping did not alter the morphology of the nanoparticles, and the anatase phase predominated, with the retention of the rutile phase. The band gap values, superficial areas, and crystallite sizes of the powders decreased after doping. The PL results showed an additional energy level in the TiO<jats:sub>2</jats:sub>:N band gap structure as a result of TiO<jats:sub>2</jats:sub>lattice defects caused by doping. At low N contents, the powders showed continuous emissions from the blue region to the yellow region and a high N content shifted the PL emissions to the red region. These results suggest that the use of these powders could increase the efficiencies of solar cells and water-splitting processes. The photocatalytic activity of the powders under UVC illumination was confirmed for different organic dye molecules. The OH radical production did not change extensively after doping, as shown by experiments with terephthalic acid, and higher photocatalytic efficiencies in Rhodamine-B degradation under UVC illumination were achieved using the doped samples.</jats:p> |
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| author | Byzynski, Gabriela, Ribeiro, Caue, Longo, Elson |
| author_facet | Byzynski, Gabriela, Ribeiro, Caue, Longo, Elson, Byzynski, Gabriela, Ribeiro, Caue, Longo, Elson |
| author_sort | byzynski, gabriela |
| container_start_page | 1 |
| container_title | International Journal of Photoenergy |
| container_volume | 2015 |
| description | <jats:p>The defects caused by doping are important for understanding the increased photocatalytic activities of TiO<jats:sub>2</jats:sub>:N in organic reactions and in the evaluation of OH radical production after doping. TiO<jats:sub>2</jats:sub>:N was therefore synthesized using a modified polymeric method and N doping was performed by calcination with urea. The resulting powders were characterized using field emission scanning electron microscopy, X-ray diffraction, diffuse reflectance spectroscopy, Raman spectroscopy, Fourier transformation infrared spectroscopy, and photoluminescence emission spectroscopy (PL). N doping did not alter the morphology of the nanoparticles, and the anatase phase predominated, with the retention of the rutile phase. The band gap values, superficial areas, and crystallite sizes of the powders decreased after doping. The PL results showed an additional energy level in the TiO<jats:sub>2</jats:sub>:N band gap structure as a result of TiO<jats:sub>2</jats:sub>lattice defects caused by doping. At low N contents, the powders showed continuous emissions from the blue region to the yellow region and a high N content shifted the PL emissions to the red region. These results suggest that the use of these powders could increase the efficiencies of solar cells and water-splitting processes. The photocatalytic activity of the powders under UVC illumination was confirmed for different organic dye molecules. The OH radical production did not change extensively after doping, as shown by experiments with terephthalic acid, and higher photocatalytic efficiencies in Rhodamine-B degradation under UVC illumination were achieved using the doped samples.</jats:p> |
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| imprint | Hindawi Limited, 2015 |
| imprint_str_mv | Hindawi Limited, 2015 |
| institution | DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1 |
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| mega_collection | Hindawi Limited (CrossRef) |
| physical | 1-12 |
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| publishDateSort | 2015 |
| publisher | Hindawi Limited |
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| series | International Journal of Photoenergy |
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| spelling | Byzynski, Gabriela Ribeiro, Caue Longo, Elson 1110-662X 1687-529X Hindawi Limited General Materials Science Renewable Energy, Sustainability and the Environment Atomic and Molecular Physics, and Optics General Chemistry http://dx.doi.org/10.1155/2015/831930 <jats:p>The defects caused by doping are important for understanding the increased photocatalytic activities of TiO<jats:sub>2</jats:sub>:N in organic reactions and in the evaluation of OH radical production after doping. TiO<jats:sub>2</jats:sub>:N was therefore synthesized using a modified polymeric method and N doping was performed by calcination with urea. The resulting powders were characterized using field emission scanning electron microscopy, X-ray diffraction, diffuse reflectance spectroscopy, Raman spectroscopy, Fourier transformation infrared spectroscopy, and photoluminescence emission spectroscopy (PL). N doping did not alter the morphology of the nanoparticles, and the anatase phase predominated, with the retention of the rutile phase. The band gap values, superficial areas, and crystallite sizes of the powders decreased after doping. The PL results showed an additional energy level in the TiO<jats:sub>2</jats:sub>:N band gap structure as a result of TiO<jats:sub>2</jats:sub>lattice defects caused by doping. At low N contents, the powders showed continuous emissions from the blue region to the yellow region and a high N content shifted the PL emissions to the red region. These results suggest that the use of these powders could increase the efficiencies of solar cells and water-splitting processes. The photocatalytic activity of the powders under UVC illumination was confirmed for different organic dye molecules. The OH radical production did not change extensively after doping, as shown by experiments with terephthalic acid, and higher photocatalytic efficiencies in Rhodamine-B degradation under UVC illumination were achieved using the doped samples.</jats:p> Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO<sub><b>2</b></sub>Powders International Journal of Photoenergy |
| spellingShingle | Byzynski, Gabriela, Ribeiro, Caue, Longo, Elson, International Journal of Photoenergy, Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders, General Materials Science, Renewable Energy, Sustainability and the Environment, Atomic and Molecular Physics, and Optics, General Chemistry |
| title | Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders |
| title_full | Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders |
| title_fullStr | Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders |
| title_full_unstemmed | Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders |
| title_short | Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders |
| title_sort | blue to yellow photoluminescence emission and photocatalytic activity of nitrogen doping in tio<sub><b>2</b></sub>powders |
| title_unstemmed | Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders |
| topic | General Materials Science, Renewable Energy, Sustainability and the Environment, Atomic and Molecular Physics, and Optics, General Chemistry |
| url | http://dx.doi.org/10.1155/2015/831930 |