The Effect of Transition Metal Doping on the Photooxidation Process of Titania-Clay Composites
Montmorillonite-TiO2 composites containing various transition metal ions (silver, copper, or nickel) were prepared, and their photocatalytic efficiencies were tested in the degradation of ethanol vapor at 70% relative humidity. Two light sources, UV-rich (𝜆 = 254 nm) and visible (𝜆 = 435 nm), were u...
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| Format: | Article |
| Language: | English |
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Wiley
2008-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2008/846304 |
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| author | Judit Ménesi Renáta Kékesi László Kőrösi Volker Zöllmer André Richardt Imre Dékány |
| author_facet | Judit Ménesi Renáta Kékesi László Kőrösi Volker Zöllmer André Richardt Imre Dékány |
| author_sort | Judit Ménesi |
| collection | DOAJ |
| description | Montmorillonite-TiO2 composites containing various transition metal ions (silver, copper, or nickel) were prepared, and their photocatalytic efficiencies were tested in the degradation of ethanol vapor at 70% relative humidity. Two light sources, UV-rich (𝜆 = 254 nm) and visible (𝜆 = 435 nm), were used. The kinetics of degradation was monitored by gas chromatography. It was established that, in the case of each catalyst, ethanol degradation was more efficient in UV-C (𝜆 = 254 nm) than in visible light, furthermore, these samples containing silver or copper ions were in each case about twice more efficient than P25 TiO2 (Degussa AG.) used as a reference. In photooxidation by visible light, TiO2/clay samples doped with silver or copper were also more efficient than the reference sample, P25 TiO2. We show that doping metal ions can also be delivered to the surface of the support by ion exchange and significantly alters the optical characteristics of the TiO2/clay composite. |
| format | Article |
| id | doaj-art-04dc4378e04e4062a56d82ee43ad0aef |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2008-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-04dc4378e04e4062a56d82ee43ad0aef2025-02-03T01:25:55ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2008-01-01200810.1155/2008/846304846304The Effect of Transition Metal Doping on the Photooxidation Process of Titania-Clay CompositesJudit Ménesi0Renáta Kékesi1László Kőrösi2Volker Zöllmer3André Richardt4Imre Dékány5Department of Colloid Chemistry, Supramolecular and Nanostructured Materials Research Group of Hungarian Academy of Sciences, University of Szeged, H-6720 Szeged, Aradi Vertanuk tere 1, HungaryDepartment of Colloid Chemistry, Supramolecular and Nanostructured Materials Research Group of Hungarian Academy of Sciences, University of Szeged, H-6720 Szeged, Aradi Vertanuk tere 1, HungaryDepartment of Colloid Chemistry, Supramolecular and Nanostructured Materials Research Group of Hungarian Academy of Sciences, University of Szeged, H-6720 Szeged, Aradi Vertanuk tere 1, HungaryFraunhofer Institute for Manufacturing and Advanced Materials (IFAM), Functional Structures, Wiener Strasse 12, Bremen 28359, GermanyGerman Armed Forces Scientific Institute for Protection Technologies, NBC-Protection, Munster 29623, GermanyDepartment of Colloid Chemistry, Supramolecular and Nanostructured Materials Research Group of Hungarian Academy of Sciences, University of Szeged, H-6720 Szeged, Aradi Vertanuk tere 1, HungaryMontmorillonite-TiO2 composites containing various transition metal ions (silver, copper, or nickel) were prepared, and their photocatalytic efficiencies were tested in the degradation of ethanol vapor at 70% relative humidity. Two light sources, UV-rich (𝜆 = 254 nm) and visible (𝜆 = 435 nm), were used. The kinetics of degradation was monitored by gas chromatography. It was established that, in the case of each catalyst, ethanol degradation was more efficient in UV-C (𝜆 = 254 nm) than in visible light, furthermore, these samples containing silver or copper ions were in each case about twice more efficient than P25 TiO2 (Degussa AG.) used as a reference. In photooxidation by visible light, TiO2/clay samples doped with silver or copper were also more efficient than the reference sample, P25 TiO2. We show that doping metal ions can also be delivered to the surface of the support by ion exchange and significantly alters the optical characteristics of the TiO2/clay composite.http://dx.doi.org/10.1155/2008/846304 |
| spellingShingle | Judit Ménesi Renáta Kékesi László Kőrösi Volker Zöllmer André Richardt Imre Dékány The Effect of Transition Metal Doping on the Photooxidation Process of Titania-Clay Composites International Journal of Photoenergy |
| title | The Effect of Transition Metal Doping on the Photooxidation Process of Titania-Clay Composites |
| title_full | The Effect of Transition Metal Doping on the Photooxidation Process of Titania-Clay Composites |
| title_fullStr | The Effect of Transition Metal Doping on the Photooxidation Process of Titania-Clay Composites |
| title_full_unstemmed | The Effect of Transition Metal Doping on the Photooxidation Process of Titania-Clay Composites |
| title_short | The Effect of Transition Metal Doping on the Photooxidation Process of Titania-Clay Composites |
| title_sort | effect of transition metal doping on the photooxidation process of titania clay composites |
| url | http://dx.doi.org/10.1155/2008/846304 |
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