Fabrication of hierarchically porous spherical particles by assembling mesoporous silica nanoparticles via spray drying

A new type of hierarchically porous materials is fabricated by assembling mesoporous nanoparticles via spray drying. Well-dispersed mesostructured silica nanoparticles (MSN), whose particle size distribution was narrow in the range of 20 nm and 50 nm, were prepared by a thermal deposition method. By...

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Published inJournal of nanoscience and nanotechnology Vol. 8; no. 6; p. 3101
Main Authors Urata, Chihiro, Yamauchi, Yusuke, Aoyama, Yuko, Imasu, Junko, Todoroki, Shin-ichi, Sakka, Yoshio, Inoue, Satoru, Kuroda, Kazuyuki
Format Journal Article
LanguageEnglish
Published United States 01.06.2008
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Summary:A new type of hierarchically porous materials is fabricated by assembling mesoporous nanoparticles via spray drying. Well-dispersed mesostructured silica nanoparticles (MSN), whose particle size distribution was narrow in the range of 20 nm and 50 nm, were prepared by a thermal deposition method. By spray drying a MSN suspension, MSN were assembled into spherical secondary particles. After calcination, the spherical particles have two types of mesopores, mesopores of 3 nm in size inside of calcined MSN and larger inter-nanoparticle mesopores of about 15-20 nm. This hierarchical pore system should provide nanospaces for efficient mass transport of guest species with different sizes.
ISSN:1533-4880
1533-4899
DOI:10.1166/jnn.2008.292