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Structural features and adsorption behaviour of mesoporous silica particles formed from droplets generated in a spraying chamber
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
2004 (English)In: Microporous and Mesoporous Materials, ISSN 1387-1811, E-ISSN 1873-3093, Vol. 72, 175-183 p.Article in journal (Refereed)
Abstract [en]

Spherical mesoporous particles have been produced by spraying hydrolysed alkoxide solutions containing templating amphiphilic molecules. The modified spray drying method produces up to 10 g/h of spherical non-hollow particles with a size of 1–5 m. Transmission electron microscopy and X-ray diffraction showed that well ordered internal 2D hexagonal mesostructures could be prepared using both nonionic block copolymers and cationic surfactants as the templating molecules. Disordered cubic and well ordered lamellar, onion like, particles were prepared from the block copolymer templates. Nitrogen sorption data and mercury porosimetry show that pore size distribution of the mesoporous particles is very narrow with pore sizes varying from 2.5 to 8.5 nm as a function of templating amphiphiles. We have shown that the mesoscopic pores are accessible after calcination and can be filled with relatively large molecules; the particles adsorbed more than 20% (by weight) of the cationic dye Janus Green B from aqueous solutions.

Place, publisher, year, edition, pages
2004. Vol. 72, 175-183 p.
Keyword [en]
Mesoporous particles, spray drying, adsorption behaviour
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27315OAI: oai:DiVA.org:ri-27315DiVA: diva2:1054319
Note
A1685Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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