Preparation of Core-shell Titania Spheroid with Mesoporous Structure and the Application in Synthesis of Glutaraldehyde

Abstract

Abstract: A novel process for preparation of micrometer-scale functional materials without organic templates has been demonstrated. Titania spheroid with a tailored core-shell structure and high ordered mesoposity has been manipulated in the ethanol hydrothermal system containing ammonia sulfate as a dispersant. Titania spheroid with a mean diameter of 3.6 μm and a high specific surface area of 266 m²/g has been synthesized by precipitating titanium tetrachloride with ammonia gas released from hydrolysis of urea at a high temperature. A special core-shell structure with a 100 nm thin shell and a 300 nm spacing strip interiors has been characterized by SEM & TEM. The catalytic performance of the titania spheoid supported WO₃ catalyst for the selective oxidation of cyclopentene(CPE) to glutaraldehyde(GA) has been investigated. The WO ₃/TiO₂ spheroid catalyst displays an exciting prospect for good selectivity(72.9%) toward GA and a high GA yield(about 70%) for the titled reaction using aqueous H₂O₂ as the oxidant.

Key words: Titania, Spheroid, Cyclopentene, Glutaraldehyde, Oxidation

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GUO Chang-Wen, DAI Wei-Lin, CAO Yong, FAN Kang-Nian . Preparation of Core-shell Titania Spheroid with Mesoporous Structure and the Application in Synthesis of Glutaraldehyde[J]. Chem. J. Chinese Universities, 2003, 24(6): 1097.

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Preparation of Core-shell Titania Spheroid with Mesoporous Structure and the Application in Synthesis of Glutaraldehyde

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