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Anatase–silica composite aerogels: a nanoparticle-based approach

Heiligtag, Florian J. ; Kränzlin, Niklaus ; Süess, Martin J. ; Niederberger, Markus

Journal of sol-gel science and technology, 2014-05, Vol.70 (2), p.300-306 [Periódico revisado por pares]

Boston: Springer US

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Título:
Anatase–silica composite aerogels: a nanoparticle-based approach
Autor: Heiligtag, Florian J. ; Kränzlin, Niklaus ; Süess, Martin J. ; Niederberger, Markus
Assuntos: Aerogels ; Anatase ; Catalytic activity ; Ceramics ; Charged particles ; Chemistry ; Chemistry and Materials Science ; Colloidal gels. Colloidal sols ; Colloidal state and disperse state ; Composites ; Crystal structure ; Crystallinity ; Exact sciences and technology ; Gelation ; General and physical chemistry ; Glass ; Inorganic Chemistry ; Materials Science ; Nanoparticles ; Nanostructure ; Nanotechnology ; Natural Materials ; Optical and Electronic Materials ; Organic chemistry ; Original Paper ; Photocatalysis ; Physical and chemical studies. Granulometry. Electrokinetic phenomena ; Porous materials ; Silica aerogels ; Silicon dioxide ; Specific surface ; Titanium dioxide
É parte de: Journal of sol-gel science and technology, 2014-05, Vol.70 (2), p.300-306
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: Herein we present the synthesis of anatase–silica aerogels based on the controlled gelation of preformed nanoparticle mixtures. The monolithic aerogels with macroscopic dimensions show large specific surface areas, and high and uniform porosities. The major advantage of such a particle-based approach is the great flexibility in pre-defining the compositional and structural features of the final aerogels before the gelation process by fine-tuning the properties of the titania and silica building blocks (e.g., size, composition and crystallinity) and their relative ratio in the dispersion. Specific surface functionalization enables control over the interaction between the nanoparticles and thus over their distribution in the aerogel. Positively charged titania nanoparticles are co-assembled with negatively charged Stoeber particles, resulting in a binary aerogel with a crystalline anatase and amorphous silica framework directly after supercritical drying without any calcination step. Titania–silica aerogels combine the photocatalytic activity of the anatase nanoparticles with the extensive silica chemistry available for silica surface functionalization.
Editor: Boston: Springer US
Idioma: Inglês

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Anatase–silica composite aerogels: a nanoparticle-based approach

Heiligtag, Florian J. ; Kränzlin, Niklaus ; Süess, Martin J. ; Niederberger, Markus

Boston: Springer US

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