Fabrication of Al-Doped TiO2 Visible-Light Photocatalyst for Low-Concentration Mercury Removal
High-quality Al-doped TiO2 visible-light photocatalyst was prepared via a single-step direct combination of vaporized Ti, Al, and O2 using a 6 kW thermal plasma system. Results showed that the formed Al-doped TiO2 nanoparticles were a mixture of anatase and rutile phase and had a size between 10 and...
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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/10.1155/2012/874509 |
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| author | Cheng-Yen Tsai Tien-Ho Kuo Hsing-Cheng Hsi |
| author_facet | Cheng-Yen Tsai Tien-Ho Kuo Hsing-Cheng Hsi |
| author_sort | Cheng-Yen Tsai |
| collection | DOAJ |
| description | High-quality Al-doped TiO2 visible-light photocatalyst was prepared via a single-step direct combination of vaporized Ti, Al, and O2 using a 6 kW thermal plasma system. Results showed that the formed Al-doped TiO2 nanoparticles were a mixture of anatase and rutile phase and had a size between 10 and 105 nm. The absorption spectra of the nanoparticles shifted towards the visible light regions, depending on the Al2O3 addition. Ti4+ and Ti3+ coexisted in the synthesized Al-doped TiO2; the Ti3+ concentration, however, increased with increasing Al2O3 addition due to Al/Ti substitution that caused the occurrence of oxygen vacancy. Hg0 breakthrough tests revealed that the nanoparticles had an appreciable Hg0 removal under visible-light irradiation. Nevertheless, moisture reduced Hg removal by the nanoparticles, especially when visible-light irradiation was applied, suggesting that the competitive adsorption between H2O and Hg species on the active sites of TiO2 surface occurred. |
| format | Article |
| id | doaj-art-dfa8affe3f7047718afff9b5522f719c |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-dfa8affe3f7047718afff9b5522f719c2025-08-20T03:26:24ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2012-01-01201210.1155/2012/874509874509Fabrication of Al-Doped TiO2 Visible-Light Photocatalyst for Low-Concentration Mercury RemovalCheng-Yen Tsai0Tien-Ho Kuo1Hsing-Cheng Hsi2Graduate Institute of Engineering Science and Technology, National Kaohsiung First University of Science and Technology, No. 2 Jhuoyue Road, Nanzih, Kaohsiung 811, TaiwanDepartment of Environmental, Safety, and Health Engineering, Tungnan University, Section 3, 152, Peishen Road, Shenkeng, New Taipei 222, TaiwanInstitute of Environmental Engineering and Management, National Taipei University of Technology, Section 3, No. 1, Chung-Hsiao E. Road, Taipei 106, TaiwanHigh-quality Al-doped TiO2 visible-light photocatalyst was prepared via a single-step direct combination of vaporized Ti, Al, and O2 using a 6 kW thermal plasma system. Results showed that the formed Al-doped TiO2 nanoparticles were a mixture of anatase and rutile phase and had a size between 10 and 105 nm. The absorption spectra of the nanoparticles shifted towards the visible light regions, depending on the Al2O3 addition. Ti4+ and Ti3+ coexisted in the synthesized Al-doped TiO2; the Ti3+ concentration, however, increased with increasing Al2O3 addition due to Al/Ti substitution that caused the occurrence of oxygen vacancy. Hg0 breakthrough tests revealed that the nanoparticles had an appreciable Hg0 removal under visible-light irradiation. Nevertheless, moisture reduced Hg removal by the nanoparticles, especially when visible-light irradiation was applied, suggesting that the competitive adsorption between H2O and Hg species on the active sites of TiO2 surface occurred.http://dx.doi.org/10.1155/2012/874509 |
| spellingShingle | Cheng-Yen Tsai Tien-Ho Kuo Hsing-Cheng Hsi Fabrication of Al-Doped TiO2 Visible-Light Photocatalyst for Low-Concentration Mercury Removal International Journal of Photoenergy |
| title | Fabrication of Al-Doped TiO2 Visible-Light Photocatalyst for Low-Concentration Mercury Removal |
| title_full | Fabrication of Al-Doped TiO2 Visible-Light Photocatalyst for Low-Concentration Mercury Removal |
| title_fullStr | Fabrication of Al-Doped TiO2 Visible-Light Photocatalyst for Low-Concentration Mercury Removal |
| title_full_unstemmed | Fabrication of Al-Doped TiO2 Visible-Light Photocatalyst for Low-Concentration Mercury Removal |
| title_short | Fabrication of Al-Doped TiO2 Visible-Light Photocatalyst for Low-Concentration Mercury Removal |
| title_sort | fabrication of al doped tio2 visible light photocatalyst for low concentration mercury removal |
| url | http://dx.doi.org/10.1155/2012/874509 |
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