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| Content Provider | Springer Nature Link |
|---|---|
| Author | Chung, Shyan Lung Wang, Ching Mei |
| Copyright Year | 2010 |
| Abstract | TiO$_{2}$ photocatalytic powders were synthesized by a sol–gel combustion synthesis method in which urea was used as the fuel and titanyl nitrate was used as the oxidizer. Various fuel-to-oxidizer ratios were studied for their effects on the combustion phenomena and the properties of the synthesized TiO$_{2}$. The fuel-to-oxidizer ratio was found to determine the maximum combustion temperature, which in turn affects the specific surface area, crystallite size, and weight fraction of anatase phase of the synthesized TiO$_{2}$. The synthesized TiO$_{2}$ all contain carbonaceous species and are either pure anatase or anatase–rutile mixed phase in crystalline structure. The photocatalytic activity of the TiO$_{2}$ was found to correlate to a certain degree with the specific surface area, crystallite size, weight fraction of anatase phase, and visible and IR absorbances. The mixed phase TiO$_{2}$ shows a higher photocatalytic activity than the pure anatase phase TiO$_{2}$ when containing a small fraction (<~25 wt%) of rutile phase but a lower phoyocatalytic activity when containing a large fraction (>~25 wt%) of rutile phase. The synthesized TiO$_{2}$ all show higher photocatalytic activity than Degussa P25 TiO$_{2}$. The enhanced photocatalytic activity was attributed mainly to sensitization by the carbonaceous species and larger amounts of hydroxyl group adsorbed on the TiO$_{2}$ surface. |
| Starting Page | 76 |
| Ending Page | 85 |
| Page Count | 10 |
| File Format | |
| ISSN | 09280707 |
| Journal | Journal of Sol-Gel Science and Technology |
| Volume Number | 57 |
| Issue Number | 1 |
| e-ISSN | 15734846 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2010-09-11 |
| Publisher Place | Boston |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Sol–gel combustion synthesis Titanium dioxide Photocatalytic Nanotechnology Optical and Electronic Materials Inorganic Chemistry Ceramics, Glass, Composites, Natural Methods |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ceramics and Composites Chemistry Materials Chemistry Biomaterials Condensed Matter Physics Electronic, Optical and Magnetic Materials |
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