Synthesis of a Multinanoparticle-Embedded Core/Mesoporous Silica Shell Structure As a Durable Heterogeneous Catalyst

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• 作者：Lijun Wang ; Jianlin Shi ; Yan Zhu ; Qianjun He ; Huaiyong Xing ; Jian Zhou ; Feng Chen ; Yu Chen
• 刊名：Langmuir
• 出版年：2012
• 出版时间：March 20, 2012
• 年：2012
• 卷：28
• 期：11
• 页码：4920-4925
• 全文大小：382K
• 年卷期：v.28,no.11(March 20, 2012)
• ISSN：1520-5827

文摘

A multi-nanoparticle-embedded amorphous aluminum/magnesium oxides (AAMO) core/mesoporous silica (mSiO₂) shell structure has been successfully synthesized by calcining the presynthesized catalyst precursor-containing layered double hydroxide (LDH) core/mesoporous silica shell composite. The well-dispersed catalytic nanoparticles were fixed at the interface between AAMO core and mesoporous SiO₂ shell, i.e., at the inner pore mouths of the mesoporous SiO₂ shell, which could effectively prevent nanoparticles from growth and/or aggregation with each other and in the meantime allow efficient access of reactants to the catalytic NPs. The final core/shell composite was found to be an efficient and highly recyclable heterogeneous catalyst.