TiO 2 Nanocatalysts Supported on a Hybrid Carbon-Covered Alumina Support: Comparison between Visible Light and UV Light Degradation of Rhodamine B

Titania nanoparticles were successfully supported on carbon-covered alumina (CCA) supports via the impregnation method to form carbon-covered alumna titania (CCA/TiO2). The CCA supports were synthesised through an equilibrium adsorption of toluene 2,4-diisocyante where the N=C=O irreversibly adsorbs...

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Bibliographic Details
Published in:Journal of nanotechnology 2015, Vol.2015 (2015), p.1-8
Main Authors: Mamba, Bhekie B., Krause, Rui W., Mishra, Shivani B., Mishra, Ajay K., Mahlambi, Mphilisi M., Raichur, Ashok M.
Format: Article
Language:English
Subjects:
Aluminum oxide
Degradation
Nanostructure
Nanotechnology
Pyrolysis
Rate constants
Rhodamine
Titanium dioxide
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Summary:Titania nanoparticles were successfully supported on carbon-covered alumina (CCA) supports via the impregnation method to form carbon-covered alumna titania (CCA/TiO2). The CCA supports were synthesised through an equilibrium adsorption of toluene 2,4-diisocyante where the N=C=O irreversibly adsorbs on the alumina and pyrolysis at 700°C affords CCA supports. These CCA/TiO2 nanocatalysts were tested for their photocatalytic activity both under UV and visible light using Rhodamine B as a model pollutant. The reaction rate constant of the CCA/TiO2 was found to be higher than that of unsupported titania and the reaction kinetics were found to follow an apparent first-order rate law. The CCA/TiO2 nanocatalysts had a much larger surface area than the unsupported titania and they exhibited overall higher photodegradation efficiency under both UV and visible light than unsupported TiO2.
ISSN:1687-9503
1687-9511
DOI:10.1155/2015/198723