Synthesis and characterization of hollow silica spheres

The synthesis and characterization of mono-dispersed silica hollow spheres using polystyrene (PS) spheres as template from the hydrolysis and condensation of tetraethylorthosilicate (TEOS) is presented. Successive washing steps with toluene and subsequent calcination at different temperatures were p...

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Autores principales: Gorsd, Marina Noelia, Pizzio, Luis René, Blanco Fernández, María Amparo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Química
Silica
Hollow spheres
Polystyrene
TEOS
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/104709
http://hdl.handle.net/11336/4619
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-104709
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Silica
Hollow spheres
Polystyrene
TEOS
spellingShingle Química
Silica
Hollow spheres
Polystyrene
TEOS
Gorsd, Marina Noelia
Pizzio, Luis René
Blanco Fernández, María Amparo
Synthesis and characterization of hollow silica spheres
topic_facet Química
Silica
Hollow spheres
Polystyrene
TEOS
description The synthesis and characterization of mono-dispersed silica hollow spheres using polystyrene (PS) spheres as template from the hydrolysis and condensation of tetraethylorthosilicate (TEOS) is presented. Successive washing steps with toluene and subsequent calcination at different temperatures were performed, in order to remove the PS template. Furthermore, the PS core removal was studied using different calcination temperatures, but without the prior washing with toluene. The morphology of the materials was studied by scanning electron microscopy and by transmission electron microscopy. A shell formed by silica nanoparticles with 50 nm diameter, being the layer of 100 nm thickness, was observed when using a low concentration of catalyst in the sol-gel reaction. The textural properties of the silica coating, obtained from N2 adsorption-desorption isotherms, depend on the catalyst amount added for the TEOS hydrolysis. From the Fourier transform infrared spectra and the results of the thermogravimetric analyses, it was found that the almost complete removal of the polystyrene core can be directly achieved by calcining at 500 °C, without the need of carrying out any washing and minimizing the formation of cracks in the silica hollow spheres.
format Articulo
Articulo
author Gorsd, Marina Noelia
Pizzio, Luis René
Blanco Fernández, María Amparo
author_facet Gorsd, Marina Noelia
Pizzio, Luis René
Blanco Fernández, María Amparo
author_sort Gorsd, Marina Noelia
title Synthesis and characterization of hollow silica spheres
title_short Synthesis and characterization of hollow silica spheres
title_full Synthesis and characterization of hollow silica spheres
title_fullStr Synthesis and characterization of hollow silica spheres
title_full_unstemmed Synthesis and characterization of hollow silica spheres
title_sort synthesis and characterization of hollow silica spheres
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/104709
http://hdl.handle.net/11336/4619
work_keys_str_mv AT gorsdmarinanoelia synthesisandcharacterizationofhollowsilicaspheres
AT pizzioluisrene synthesisandcharacterizationofhollowsilicaspheres
AT blancofernandezmariaamparo synthesisandcharacterizationofhollowsilicaspheres
bdutipo_str Repositorios
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