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Photodegradation of organic pollutants RhB dye using UV simulated sunlight on ceria based TiO(2) nanomaterials for antibacterial applications

To photo-catalytically degrade RhB dye using solar irradiation, CeO(2) doped TiO(2) nanocomposites were synthesized hydrothermally at 700 °C for 9 hrs. All emission spectra showed a prominent band centered at 442 nm that was attributed to oxygen related defects in the CeO(2)-TiO(2) nanocrystals. Two...

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Autores principales: Kasinathan, Kaviyarasu, Kennedy, John, Elayaperumal, Manikandan, Henini, Mohamed, Malik, Maaza
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5128916/
https://www.ncbi.nlm.nih.gov/pubmed/27901105
http://dx.doi.org/10.1038/srep38064
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author Kasinathan, Kaviyarasu
Kennedy, John
Elayaperumal, Manikandan
Henini, Mohamed
Malik, Maaza
author_facet Kasinathan, Kaviyarasu
Kennedy, John
Elayaperumal, Manikandan
Henini, Mohamed
Malik, Maaza
author_sort Kasinathan, Kaviyarasu
collection PubMed
description To photo-catalytically degrade RhB dye using solar irradiation, CeO(2) doped TiO(2) nanocomposites were synthesized hydrothermally at 700 °C for 9 hrs. All emission spectra showed a prominent band centered at 442 nm that was attributed to oxygen related defects in the CeO(2)-TiO(2) nanocrystals. Two sharp absorption bands at 1418 cm(−1) and 3323 cm(−1) were attributed to the deformation and stretching vibration, and bending vibration of the OH group of water physisorbed to TiO(2), respectively. The photocatalytic activities of Ce-TiO(2) nanocrystals were investigated through the degradation of RhB under UV and UV+ visible light over a period of 8 hrs. After 8 hrs, the most intense absorption peak at 579 nm disappeared under the highest photocatalytic activity and 99.89% of RhB degraded under solar irradiation. Visible light-activated TiO(2) could be prepared from metal-ion incorporation, reduction of TiO(2), non-metal doping or sensitizing of TiO(2) using dyes. Studying the antibacterial activity of Ce-TiO(2) nanocrystals against E. coli revealed significant activity when 10 μg was used, suggesting that it can be used as an antibacterial agent. Its effectiveness is likely related to its strong oxidation activity and superhydrophilicity. This study also discusses the mechanism of heterogeneous photocatalysis in the presence of TiO(2).
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spelling pubmed-51289162016-12-15 Photodegradation of organic pollutants RhB dye using UV simulated sunlight on ceria based TiO(2) nanomaterials for antibacterial applications Kasinathan, Kaviyarasu Kennedy, John Elayaperumal, Manikandan Henini, Mohamed Malik, Maaza Sci Rep Article To photo-catalytically degrade RhB dye using solar irradiation, CeO(2) doped TiO(2) nanocomposites were synthesized hydrothermally at 700 °C for 9 hrs. All emission spectra showed a prominent band centered at 442 nm that was attributed to oxygen related defects in the CeO(2)-TiO(2) nanocrystals. Two sharp absorption bands at 1418 cm(−1) and 3323 cm(−1) were attributed to the deformation and stretching vibration, and bending vibration of the OH group of water physisorbed to TiO(2), respectively. The photocatalytic activities of Ce-TiO(2) nanocrystals were investigated through the degradation of RhB under UV and UV+ visible light over a period of 8 hrs. After 8 hrs, the most intense absorption peak at 579 nm disappeared under the highest photocatalytic activity and 99.89% of RhB degraded under solar irradiation. Visible light-activated TiO(2) could be prepared from metal-ion incorporation, reduction of TiO(2), non-metal doping or sensitizing of TiO(2) using dyes. Studying the antibacterial activity of Ce-TiO(2) nanocrystals against E. coli revealed significant activity when 10 μg was used, suggesting that it can be used as an antibacterial agent. Its effectiveness is likely related to its strong oxidation activity and superhydrophilicity. This study also discusses the mechanism of heterogeneous photocatalysis in the presence of TiO(2). Nature Publishing Group 2016-11-30 /pmc/articles/PMC5128916/ /pubmed/27901105 http://dx.doi.org/10.1038/srep38064 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Kasinathan, Kaviyarasu
Kennedy, John
Elayaperumal, Manikandan
Henini, Mohamed
Malik, Maaza
Photodegradation of organic pollutants RhB dye using UV simulated sunlight on ceria based TiO(2) nanomaterials for antibacterial applications
title Photodegradation of organic pollutants RhB dye using UV simulated sunlight on ceria based TiO(2) nanomaterials for antibacterial applications
title_full Photodegradation of organic pollutants RhB dye using UV simulated sunlight on ceria based TiO(2) nanomaterials for antibacterial applications
title_fullStr Photodegradation of organic pollutants RhB dye using UV simulated sunlight on ceria based TiO(2) nanomaterials for antibacterial applications
title_full_unstemmed Photodegradation of organic pollutants RhB dye using UV simulated sunlight on ceria based TiO(2) nanomaterials for antibacterial applications
title_short Photodegradation of organic pollutants RhB dye using UV simulated sunlight on ceria based TiO(2) nanomaterials for antibacterial applications
title_sort photodegradation of organic pollutants rhb dye using uv simulated sunlight on ceria based tio(2) nanomaterials for antibacterial applications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5128916/
https://www.ncbi.nlm.nih.gov/pubmed/27901105
http://dx.doi.org/10.1038/srep38064
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