Facile Synthesis of Mesoporous Cu2O Microspheres with Improved Catalytic Property for Dimethyldichlorosilane Synthesis

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• 作者：Zailei Zhang ; Hongwei Che ; Yingli Wang ; Jiajian Gao ; Lirun Zhao ; Xilin She ; Jin Sun ; Poernomo Gunawan ; Ziyi Zhong ; Fabing Su
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：January 25, 2012
• 年：2012
• 卷：51
• 期：3
• 页码：1264-1274
• 全文大小：822K
• 年卷期：v.51,no.3(January 25, 2012)
• ISSN：1520-5045

文摘

Mesoporous Cu₂O (MP-Cu₂O) microspheres were prepared via a facile template-free hydrothermal synthesis in the open system, in which copper acetate was used as the copper precursor and glucose as a reducing agent. The synthesis conditions and catalytic property of MP-Cu₂O for dimethyldichlorosilane synthesis via the Rochow reaction were investigated, and the formation mechanism of MP-Cu₂O microspheres was proposed. The samples were characterized by nitrogen adsorption, X-ray diffraction, temperature-programmed reduction, thermogravimetric analysis, transmission electron microscopy, and scanning electron microscopy. It was found that the synthesis conditions such as reaction temperature, time, and reactant amount added have a significant effect on the morphology and pore structure of MP-Cu₂O microspheres, and MP-Cu₂O microspheres were formed through assembly of Cu₂O nanoparticles. MP-Cu₂O microspheres with a surface area of 65.8 m²/g, pore size of 26.7 nm, and a diameter of 400鈥?00 nm were obtained under the optimized condition. As compared to the nonporous Cu₂O microspheres, MP-Cu₂O microspheres showed a better catalytic performance in dimethyldichlorosilane synthesis due to their developed pore structure and high surface area, which allow larger contact interface among the reaction gas, solid catalyst, and the solid reactant, together with enhanced mass transport. The work would be helpful for developing novel structured copper catalysts for organosilane synthesis and for understanding the catalytic mechanism.