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Silica Hollow Spheres with Ordered and Radially Oriented Amino-Functionalized Mesochannels

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Using anionic surfactant as templates, ordered mesoporous silica hollow spheres (MSHSs) with radially
oriented mesochannels were synthesized with the aid of ultrasonic irradiation. The product was consisted
of intact and dispersed hollow spheres with the diameter mostly in the range of 100-500 nm. The hollow
spheres possessed uniform shell with the thickness of 35-40 nm, and the shell with radially oriented
mesopores exhibited well-ordered structure as confirmed by X-ray diffraction (XRD) and transmission
electron microscopy (TEM) measurements. After extraction of the anionic surfactant templates by solvent,
silica hollow spheres with ordered and radially oriented amino-functionalized mesochannels were obtained.
Moreover, by adjustment of the sonochemical processing time, the shell thickness, mesostructure
(hexagonal, radial, or disordered), and shape of the inner cavity (hexagonal or spherical shape) of the
hollow spheres could be facilely tuned. The formation process of the radially ordered mesostructure
could be attributed to a relatively slow cooperative realignment process of the silica/surfactant hybrid
mesophase in this anionic surfactant templating system. The effectiveness of the radially aligned mesopores
was validated by a drug (flurbiprofen) release experiment, in which the hollow spheres exhibited relatively
high drug storage capacity (>1000 mg g-1) and much faster drug release rate than that of the flakelike
mesoporous SBA-15 particles.

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Informasi Detail

Judul Seri

Chemistry of Materials

No. Panggil

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Penerbit

Washington, DC : American Chemical Society., 2009

Deskripsi Fisik

Chem. Mater. 2009, 21, 612–620

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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