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Architecture of Yolk-Shell Structured Mesoporous Silica Nanospheres for Catalytic Applications

Architecture of Yolk-Shell Structured Mesoporous Silica Nanospheres for Catalytic Applications

Xue Wang, Yapeng He, Yali Ma, Junmin Liu, Yunling Liu, Zhen-An Qiao, Qisheng Huo

Dalton Trans. 2018 Jul 10;47(27):9072-9078.

PMID: 29932204

Abstract:

We report the design and realization of yolk-shell structured nanospheres with periodic mesoporous organosilica (PMO) nanospheres or noble metal nanoparticles encapsulated in mesoporous silica shells via a selective etching method. These architectures have well controlled structure, size and morphology. The yolk-shell structured PMO@SiO2 nanoparticles can be precisely functionalized with different catalytic functionalities, even incompatible acidic and basic groups: the PMO core with amino (-NH2) groups and the mesoporous silica shell with sulfonic acid (-SO3H) groups. As a nanoreactor, the as-synthesized Au@SiO2 nanospheres show faster reduction of 4-nitrophenol than that of nitrobenzene. Furthermore, the prepared PMO-NH2@SiO2-SO3H nanoparticles can be used as bifunctional catalysts with highly efficient catalytic performance for catalyzing the deacetalization-Henry cascade reaction.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS76783	Silica nanospheres			Price

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