In-situ investigations of the photoluminescence properties of SiO2/TiO2 binary and Boron-SiO2/TiO2 ternary oxides prepared by the sol-gel method and their photocatalytic reactivity for the oxidative decomposition of trichloroethylene
Photoluminescence behavior of TiO2, SiO2/TiO2 binary and Boron-SiO2/TiO2 ternary oxides prepared by the sol-gel method was investigated. The differences in their photocatalytic reactivities of TiO2-based photocatalysts were interpreted in terms of the relationship of the difference in their photolum...
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| Format: | Article |
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Wiley
2003-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/S1110662X03000096 |
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| author | Kyeong Youl Jung Seung Bin Park Masaya Matsuoka Masakazu Anpo |
| author_facet | Kyeong Youl Jung Seung Bin Park Masaya Matsuoka Masakazu Anpo |
| author_sort | Kyeong Youl Jung |
| collection | DOAJ |
| description | Photoluminescence behavior of TiO2, SiO2/TiO2 binary and Boron-SiO2/TiO2 ternary oxides prepared by the sol-gel method was investigated. The differences in their photocatalytic reactivities of TiO2-based photocatalysts were interpreted in terms of the relationship of the difference in their photoluminescence
characteristics. The addition of SiO2 into TiO2 matrix induced new photoluminescence sites, which were due to anchored titanium oxide species (i.e., the formation of Ti–O–Si bonds) located on the surface. The photoluminescence was found to be very sensitive to the presence of oxygen. These new photoluminescence
completely disappeared by the addition of boron into SiO2/TiO2 binary oxide, since the emitting sites having a Ti–O–Si bond were destroyed and the new sites having B–O–Ti or Si–O–B bonds were
constructed on the surface, being in agreement with the results obtained by FT-IR measurements. For all
TiO2-based photocatalysts, a significant quenching of photoluminescence was observed by the addition of
oxygen. It was found that the photocatalytic reactivity of TiO2-based photocatalysts for the decomposition of trichloroethylene was clearly associated with their relative quenching efficiencies of photoluminescence; photocatalyst showing high quenching efficiency exhibited a high photocatalytic reactivity. |
| format | Article |
| id | doaj-art-40b584d3c9054cb596df4334ecdd73bb |
| institution | Kabale University |
| issn | 1110-662X |
| language | English |
| publishDate | 2003-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-40b584d3c9054cb596df4334ecdd73bb2025-02-03T05:50:58ZengWileyInternational Journal of Photoenergy1110-662X2003-01-0151313610.1155/S1110662X03000096In-situ investigations of the photoluminescence properties of SiO2/TiO2 binary and Boron-SiO2/TiO2 ternary oxides prepared by the sol-gel method and their photocatalytic reactivity for the oxidative decomposition of trichloroethyleneKyeong Youl Jung0Seung Bin Park1Masaya Matsuoka2Masakazu Anpo3Department of Chemical Engineering, Korea Advanced Institute of Science and Technology 373-1, Kusong-dong Yusong-gu, Taejon 305-701, KoreaDepartment of Chemical Engineering, Korea Advanced Institute of Science and Technology 373-1, Kusong-dong Yusong-gu, Taejon 305-701, KoreaDepartment of Applied Chemistry, Graduate School of Engineering, Osaka Perfecture University, Gakuen-cho 1-1, Sakai, Osaka 599-8531, JapanDepartment of Applied Chemistry, Graduate School of Engineering, Osaka Perfecture University, Gakuen-cho 1-1, Sakai, Osaka 599-8531, JapanPhotoluminescence behavior of TiO2, SiO2/TiO2 binary and Boron-SiO2/TiO2 ternary oxides prepared by the sol-gel method was investigated. The differences in their photocatalytic reactivities of TiO2-based photocatalysts were interpreted in terms of the relationship of the difference in their photoluminescence characteristics. The addition of SiO2 into TiO2 matrix induced new photoluminescence sites, which were due to anchored titanium oxide species (i.e., the formation of Ti–O–Si bonds) located on the surface. The photoluminescence was found to be very sensitive to the presence of oxygen. These new photoluminescence completely disappeared by the addition of boron into SiO2/TiO2 binary oxide, since the emitting sites having a Ti–O–Si bond were destroyed and the new sites having B–O–Ti or Si–O–B bonds were constructed on the surface, being in agreement with the results obtained by FT-IR measurements. For all TiO2-based photocatalysts, a significant quenching of photoluminescence was observed by the addition of oxygen. It was found that the photocatalytic reactivity of TiO2-based photocatalysts for the decomposition of trichloroethylene was clearly associated with their relative quenching efficiencies of photoluminescence; photocatalyst showing high quenching efficiency exhibited a high photocatalytic reactivity.http://dx.doi.org/10.1155/S1110662X03000096 |
| spellingShingle | Kyeong Youl Jung Seung Bin Park Masaya Matsuoka Masakazu Anpo In-situ investigations of the photoluminescence properties of SiO2/TiO2 binary and Boron-SiO2/TiO2 ternary oxides prepared by the sol-gel method and their photocatalytic reactivity for the oxidative decomposition of trichloroethylene International Journal of Photoenergy |
| title | In-situ investigations of the photoluminescence properties of SiO2/TiO2 binary and Boron-SiO2/TiO2 ternary oxides prepared by the sol-gel method and their photocatalytic reactivity for the oxidative decomposition of trichloroethylene |
| title_full | In-situ investigations of the photoluminescence properties of SiO2/TiO2 binary and Boron-SiO2/TiO2 ternary oxides prepared by the sol-gel method and their photocatalytic reactivity for the oxidative decomposition of trichloroethylene |
| title_fullStr | In-situ investigations of the photoluminescence properties of SiO2/TiO2 binary and Boron-SiO2/TiO2 ternary oxides prepared by the sol-gel method and their photocatalytic reactivity for the oxidative decomposition of trichloroethylene |
| title_full_unstemmed | In-situ investigations of the photoluminescence properties of SiO2/TiO2 binary and Boron-SiO2/TiO2 ternary oxides prepared by the sol-gel method and their photocatalytic reactivity for the oxidative decomposition of trichloroethylene |
| title_short | In-situ investigations of the photoluminescence properties of SiO2/TiO2 binary and Boron-SiO2/TiO2 ternary oxides prepared by the sol-gel method and their photocatalytic reactivity for the oxidative decomposition of trichloroethylene |
| title_sort | in situ investigations of the photoluminescence properties of sio2 tio2 binary and boron sio2 tio2 ternary oxides prepared by the sol gel method and their photocatalytic reactivity for the oxidative decomposition of trichloroethylene |
| url | http://dx.doi.org/10.1155/S1110662X03000096 |
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