Synthesis and Photocatalytic Activity of TiOX Powders with Different Oxygen Defects
The novel carbon- or chromium-doped TiOX photocatalysts with different oxygen defects were synthesized by mechanochemical technique and heating process. The samples were characterized by X-ray diffraction, UV-vis spectrophotometer, and fluorescence spectrometer. Carbon and chromium species were inco...
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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/10.1155/2012/208987 |
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| author | Leini Wang Fei Lu Fanming Meng |
| author_facet | Leini Wang Fei Lu Fanming Meng |
| author_sort | Leini Wang |
| collection | DOAJ |
| description | The novel carbon- or chromium-doped TiOX photocatalysts with different oxygen defects were synthesized by mechanochemical technique and heating process. The samples were characterized by X-ray diffraction, UV-vis spectrophotometer, and fluorescence spectrometer. Carbon and chromium species were incorporated into TiOX crystal matrix. The mass fraction of Ti7O13 in TiOX photocatalysts could be tunable through carbon or chromium doping. The mass fraction of Ti7O13 could be an indication of the degree of oxygen defects (the concentration of Ti3+) in the TiOX. The degree of oxygen defects increased for carbon doping, while the degree of oxygen defects decreased for chromium doping. The photocatalytic activity measurement results showed that photodegradation rate of methyl orange reached the maximum value with mass fraction of Ti7O13 of about 66.93%, but the photodegradation rate decreased when mass fraction of Ti7O13 is raised further. In addition, the origin of absorption in the visible spectral range for carbon-doped TiOX as well as the effect of band gap on photocatalytic activity has also been discussed in this paper. |
| format | Article |
| id | doaj-art-fb986b3a012d408ba284dbfb258c1179 |
| 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-fb986b3a012d408ba284dbfb258c11792025-08-20T02:22:55ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2012-01-01201210.1155/2012/208987208987Synthesis and Photocatalytic Activity of TiOX Powders with Different Oxygen DefectsLeini Wang0Fei Lu1Fanming Meng2Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University, Hefei 230039, ChinaAnhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University, Hefei 230039, ChinaAnhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University, Hefei 230039, ChinaThe novel carbon- or chromium-doped TiOX photocatalysts with different oxygen defects were synthesized by mechanochemical technique and heating process. The samples were characterized by X-ray diffraction, UV-vis spectrophotometer, and fluorescence spectrometer. Carbon and chromium species were incorporated into TiOX crystal matrix. The mass fraction of Ti7O13 in TiOX photocatalysts could be tunable through carbon or chromium doping. The mass fraction of Ti7O13 could be an indication of the degree of oxygen defects (the concentration of Ti3+) in the TiOX. The degree of oxygen defects increased for carbon doping, while the degree of oxygen defects decreased for chromium doping. The photocatalytic activity measurement results showed that photodegradation rate of methyl orange reached the maximum value with mass fraction of Ti7O13 of about 66.93%, but the photodegradation rate decreased when mass fraction of Ti7O13 is raised further. In addition, the origin of absorption in the visible spectral range for carbon-doped TiOX as well as the effect of band gap on photocatalytic activity has also been discussed in this paper.http://dx.doi.org/10.1155/2012/208987 |
| spellingShingle | Leini Wang Fei Lu Fanming Meng Synthesis and Photocatalytic Activity of TiOX Powders with Different Oxygen Defects International Journal of Photoenergy |
| title | Synthesis and Photocatalytic Activity of TiOX Powders with Different Oxygen Defects |
| title_full | Synthesis and Photocatalytic Activity of TiOX Powders with Different Oxygen Defects |
| title_fullStr | Synthesis and Photocatalytic Activity of TiOX Powders with Different Oxygen Defects |
| title_full_unstemmed | Synthesis and Photocatalytic Activity of TiOX Powders with Different Oxygen Defects |
| title_short | Synthesis and Photocatalytic Activity of TiOX Powders with Different Oxygen Defects |
| title_sort | synthesis and photocatalytic activity of tiox powders with different oxygen defects |
| url | http://dx.doi.org/10.1155/2012/208987 |
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