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High-activity, single-site mesoporous WO3-MCF materials for the catalytic epoxidation of cycloocta-1,5-diene with aqueous hydrogen peroxide

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Abstract.
For the first time, the high-activity, single-site mesoporous WO3-MCF materials were synthesized and
characterized by N2 sorption, TEM, UV–vis DRS, UV-Raman, and XPS. It was found that the dispersion
and nature of the tungsten species depend strongly on the tungsten oxide content and the support characteristic. The novel catalyst remains a highly ordered mesostructure of the silica support. The catalytic performance of the materials in the epoxidation of cycloocta-1,5-diene with aqueous H2O2 was investigated. The excellent catalytic performance of WO3-MCF in the selective oxidation of cycloocta-1,5-diene was attributed to the presence of isolated tetrahedral {WO4} species and the unique pore structure. The
novel catalyst can be easily recycled after reaction and reused many times with no significant loss of
activity. The good stability can be attributed to the presence of isolated tungsten species anchored on the
support through W–O–Si covalent bonds.

Keywords:
Isolated tetrahedral {WO4} species
Mesocellular silica foam (MCF) catalyst
Epoxidation
Cycloocta-1,5-diene

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Informasi Detail

Judul Seri

Journal of Catalysis

No. Panggil

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Penerbit

London : Elsevier Inc.., 2008

Deskripsi Fisik

Journal of Catalysis 256 (2008) 259–267

Bahasa

English

ISBN/ISSN

00219517

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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