Mesoporous metal oxide/silica composites with photocatalytic activity and magnetic response

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

In this work, a novel class of mesoporous metal oxide/silica composites was prepared. Both ZnO and magnetite (Fe3O4) nanoparticles were embedded within the mesoporous silica architecture. The solids display a high surface area, narrow pore size distribution and a regular array of mesoporous hexagonal channels with long range ordering. All the materials were tested for the photodegradation of Rhodamine B and the catalytic performance compared with analogous mesoporous solids exclusively bearing ZnO nanoparticles in the silica framework. All the materials present good photocatalytic performance and magnetic response. The best catalyst containing 15 wt% ZnO and 5 wt% Fe3O4 particle loading, displays a higher turnover number than unstructured ZnO nanoparticles and commercial ZnO nanopowder and can be easily separated from the reaction mixture by simply applying a magnetic field as weak as the one generated by a common magnetic stirring bar.

langue originaleAnglais
Pages (de - à)33-39
Nombre de pages7
journalCatalysis Today
Volume241
Numéro de publicationPA
Les DOIs
étatPublié - 1 mars 2015

Empreinte digitale

Silicon Dioxide
Oxides
rhodamine B
Metals
Silica
Composite materials
Bearings (structural)
Nanoparticles
Magnetite nanoparticles
Photodegradation
Pore size
Magnetic fields
Catalysts

Citer ceci

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abstract = "In this work, a novel class of mesoporous metal oxide/silica composites was prepared. Both ZnO and magnetite (Fe3O4) nanoparticles were embedded within the mesoporous silica architecture. The solids display a high surface area, narrow pore size distribution and a regular array of mesoporous hexagonal channels with long range ordering. All the materials were tested for the photodegradation of Rhodamine B and the catalytic performance compared with analogous mesoporous solids exclusively bearing ZnO nanoparticles in the silica framework. All the materials present good photocatalytic performance and magnetic response. The best catalyst containing 15 wt{\%} ZnO and 5 wt{\%} Fe3O4 particle loading, displays a higher turnover number than unstructured ZnO nanoparticles and commercial ZnO nanopowder and can be easily separated from the reaction mixture by simply applying a magnetic field as weak as the one generated by a common magnetic stirring bar.",
keywords = "Magnetite, Mesoporous materials, Photodegradation, Rhodamine B, Silica composites, Zinc oxide",
author = "Xavier Collard and Adrien Comes and Carmela Aprile",
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Mesoporous metal oxide/silica composites with photocatalytic activity and magnetic response. / Collard, Xavier; Comes, Adrien; Aprile, Carmela.

Dans: Catalysis Today, Vol 241, Numéro PA, 01.03.2015, p. 33-39.

Résultats de recherche: Contribution à un journal/une revueArticle

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T1 - Mesoporous metal oxide/silica composites with photocatalytic activity and magnetic response

AU - Collard, Xavier

AU - Comes, Adrien

AU - Aprile, Carmela

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AB - In this work, a novel class of mesoporous metal oxide/silica composites was prepared. Both ZnO and magnetite (Fe3O4) nanoparticles were embedded within the mesoporous silica architecture. The solids display a high surface area, narrow pore size distribution and a regular array of mesoporous hexagonal channels with long range ordering. All the materials were tested for the photodegradation of Rhodamine B and the catalytic performance compared with analogous mesoporous solids exclusively bearing ZnO nanoparticles in the silica framework. All the materials present good photocatalytic performance and magnetic response. The best catalyst containing 15 wt% ZnO and 5 wt% Fe3O4 particle loading, displays a higher turnover number than unstructured ZnO nanoparticles and commercial ZnO nanopowder and can be easily separated from the reaction mixture by simply applying a magnetic field as weak as the one generated by a common magnetic stirring bar.

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KW - Mesoporous materials

KW - Photodegradation

KW - Rhodamine B

KW - Silica composites

KW - Zinc oxide

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