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Mesostructured SBA-16 with excellent hydrothermal, thermal and mechanical stabilities: Modified synthesis and its catalytic application

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Abstract.
We report a modified method to synthesize SBA-16 mesostructured silica under refluxing condition using
block co-polymer poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) (F127) as template,
cetyltrimethylammonium bromide (CTAB) as co-template, and tetraethyl orthosilicate (TEOS) as silica
source. The physiochemical properties of SBA-16 silica were characterized by X-ray diffraction (XRD),
nitrogen physisorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM),
and 29Si solid-state nuclear magnetic resonance (NMR). The resulting SBA-16 silica exhibited highly
ordered mesoporous structure, mono-dispersed spherical morphology, excellent hydrothermal, thermal
and mechanical stabilities. It was worth mentioning that the synthesis time can be significantly reduced
from 48 h to 8 h, which opened a feasible way to produce SBA-16 silica in a large scale. Moreover, the
“super-cage” pore structure of SBA-16 encapsulated gold nanoparticles in a “ship in a bottle” way. The
well-confined gold nanoparticles (mean size of 5 nm) with a narrow particle size distribution were highly
active in solvent-free benzyl alcohol selective oxidation with molecular oxygen.

Keywords:
SBA-16
CTAB
Refluxing
Stability
Au nanoparticles
Benzyl alcohol oxidation

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Informasi Detail

Judul Seri

Journal of Colloid and Interface Science

No. Panggil

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Penerbit

London : Elsevier Inc.., 2009

Deskripsi Fisik

Journal of Colloid and Interface Science 333 (2009) 317–323

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

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