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

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Zailei Zhang†‡, Hongwei Che†, Yingli Wang†, Jiajian Gao†, Lirun Zhao†, Xilin She‡, Jin Sun‡, Poernomo Gunawan§, Ziyi Zhong§, and Fabing Su*†

^† State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

^‡ College of Chemical and Environmental Engineering, Qingdao University, Qingdao 266071, China

^§ Institute of Chemical Engineering and Sciences, A*star, 1 Pesek Road, Jurong Island 627833, Singapore

Ind. Eng. Chem. Res., 2012, 51 (3), pp 1264–1274

DOI: 10.1021/ie2020747

Publication Date (Web): December 22, 2011

*Tel.: +86-10-82544850. Fax: +86-10-82544851. E-mail: fbsu@mail.ipe.ac.cn.

Section:

Inorganic Chemicals and Reactions

Abstract

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 400–700 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.

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History

Published In Issue January 25, 2012
Article ASAPJanuary 13, 2012
Just Accepted ManuscriptDecember 22, 2011
Received: September 10, 2011
Accepted: December 22, 2011
Revised: November 30, 2011

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