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dc.contributor.author
Fuentes Flores, Keyla Mayerlin
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Betancourt Figueroa, Paulino
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Marrero, Santiago
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Chavarría García, Samuel
dc.date.available
2018-09-11T20:43:58Z
dc.date.issued
2016-11
dc.identifier.citation
Fuentes Flores, Keyla Mayerlin; Betancourt Figueroa, Paulino; Marrero, Santiago; Chavarría García, Samuel; Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres; Springer; Reaction Kinetics, Mechanisms and Catalysis; 120; 1; 11-2016; 403-415
dc.identifier.issn
1878-5190
dc.identifier.uri
http://hdl.handle.net/11336/59231
dc.description.abstract
The photocatalytic degradation of phenol in aqueous suspensions of co-doped TiO2 supported on SiO2 spheres was investigated. A novel photocatalyst was prepared combining iron doped TiO2?SiO2 and reduced TiO2?SiO2 by mechanical milling (MM/TiO2?SiO2). All the particles were characterized by BET. nitrogen adsorption, X-ray diffraction, scanning electron microscopy, UV?visible spectroscopy and elemental analysis. Trough XRD patterns it was calculated that 2 nm rutile crystallites were formed onto SiO2 surface, ICP analysis confirmed Ti content near to nominal, while EDX analysis shows a surface content 10 lower, suggesting that the SiO2 limiting the agglomeration of TiO2 particles allowing a good dispersion. Phenol photodegradation was induced by illuminating the coated spheres in aqueous solution with a visible light source. The synthesized TiO2?SiO2 particles appeared to be 1.3 times more efficient in the phenol conversion, as compared to pure rutile particles. According to characterization results, this improvement could be attributed mainly to three factors: an effective transference of charge carriers trough the grain boundaries present between contact points, a photonic behavior evidenced on an increment on UV?vis absorption intensity and the quantum size effect of rutile crystallites coated on SiO2.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Photonic Sio2 Spheres
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Co-Doped Tio2
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Grain Boundaries
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Phenol Degradation
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Otras Ciencias Químicas
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-09-04T19:10:29Z
dc.journal.volume
120
dc.journal.number
1
dc.journal.pagination
403-415
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Fuentes Flores, Keyla Mayerlin. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Universidad Central de Venezuela; Venezuela
dc.description.fil
Fil: Betancourt Figueroa, Paulino. Universidad Central de Venezuela; Venezuela
dc.description.fil
Fil: Marrero, Santiago. Universidad Central de Venezuela; Venezuela
dc.description.fil
Fil: Chavarría García, Samuel. Universidad Central de Venezuela; Venezuela
dc.journal.title
Reaction Kinetics, Mechanisms and Catalysis
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s11144-016-1097-3
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1007/s11144-016-1097-3
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