Photodegradation of Rhodamine B in Presence of CaO and NiO-CaO Catalysts
A CaO catalyst was prepared by mild calcination (650°C) of facilely precipitated Ca(OH)2 and compared to an NiO-CaO catalyst obtained from an Ni(OH)2/Ca(OH)2 coprecipitate as a precursor. Both catalysts degraded rhodamine B (RB) effectively when exposed to ultraviolet light but exhibited slower degr...
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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/10.1155/2012/398230 |
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| _version_ | 1832549866262233088 |
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| author | Tobias Kornprobst Johann Plank |
| author_facet | Tobias Kornprobst Johann Plank |
| author_sort | Tobias Kornprobst |
| collection | DOAJ |
| description | A CaO catalyst was prepared by mild calcination (650°C) of facilely precipitated Ca(OH)2 and compared to an NiO-CaO catalyst obtained from an Ni(OH)2/Ca(OH)2 coprecipitate as a precursor. Both catalysts degraded rhodamine B (RB) effectively when exposed to ultraviolet light but exhibited slower degradation under visible light conditions. Under UV light, CaO was more effective than NiO-CaO, while in visible light, the opposite was observed. A mechanistic study revealed no influence of the specific surface area of the catalysts on RB degradation, no adsorption of RB on the positively charged surfaces of the catalysts, and only incomplete degradation of RB. Consequently, both materials represent nonconventional photocatalysts. |
| format | Article |
| id | doaj-art-88ff121eedb244aa82b8561ad80bed9d |
| 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-88ff121eedb244aa82b8561ad80bed9d2025-02-03T06:08:23ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2012-01-01201210.1155/2012/398230398230Photodegradation of Rhodamine B in Presence of CaO and NiO-CaO CatalystsTobias Kornprobst0Johann Plank1Chair for Construction Chemicals, Technische Universität München, Lichtenbergstraße 4, 85747 Garching bei München, GermanyChair for Construction Chemicals, Technische Universität München, Lichtenbergstraße 4, 85747 Garching bei München, GermanyA CaO catalyst was prepared by mild calcination (650°C) of facilely precipitated Ca(OH)2 and compared to an NiO-CaO catalyst obtained from an Ni(OH)2/Ca(OH)2 coprecipitate as a precursor. Both catalysts degraded rhodamine B (RB) effectively when exposed to ultraviolet light but exhibited slower degradation under visible light conditions. Under UV light, CaO was more effective than NiO-CaO, while in visible light, the opposite was observed. A mechanistic study revealed no influence of the specific surface area of the catalysts on RB degradation, no adsorption of RB on the positively charged surfaces of the catalysts, and only incomplete degradation of RB. Consequently, both materials represent nonconventional photocatalysts.http://dx.doi.org/10.1155/2012/398230 |
| spellingShingle | Tobias Kornprobst Johann Plank Photodegradation of Rhodamine B in Presence of CaO and NiO-CaO Catalysts International Journal of Photoenergy |
| title | Photodegradation of Rhodamine B in Presence of CaO and NiO-CaO Catalysts |
| title_full | Photodegradation of Rhodamine B in Presence of CaO and NiO-CaO Catalysts |
| title_fullStr | Photodegradation of Rhodamine B in Presence of CaO and NiO-CaO Catalysts |
| title_full_unstemmed | Photodegradation of Rhodamine B in Presence of CaO and NiO-CaO Catalysts |
| title_short | Photodegradation of Rhodamine B in Presence of CaO and NiO-CaO Catalysts |
| title_sort | photodegradation of rhodamine b in presence of cao and nio cao catalysts |
| url | http://dx.doi.org/10.1155/2012/398230 |
| work_keys_str_mv | AT tobiaskornprobst photodegradationofrhodaminebinpresenceofcaoandniocaocatalysts AT johannplank photodegradationofrhodaminebinpresenceofcaoandniocaocatalysts |