Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/88826
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Type: Journal article
Title: Amino-functionalized silica nanoparticles with center-radially hierarchical mesopores as ideal catalyst carriers
Author: Du, X.
He, J.
Citation: Nanoscale, 2012; 4(3):852-859
Publisher: Royal Society of Chemistry
Issue Date: 2012
ISSN: 2040-3364
2040-3372
Statement of
Responsibility: 
Xin Du and Junhui He
Abstract: Our previously fabricated amino-functionalized silica nanoparticles (NPs) with center-radially hierarchical mesopores (NH2-HMSNs) were purified by a filtration membrane and used as catalyst carriers in the current article. Noble metal NPs (Au, Pd, Pt and Au & Pt) with small sizes (3–8 nm) were successfully immobilized into the NH2-HMSNs via the deposition–precipitation method. These noble metal NPs with readily adjusted small sizes have high density and well-dispersed distribution on the surface of large mesopores of NH2-HMSNs. Among them, Au–NH2-HMSNs were investigated as the composite catalyst in the catalytic reduction of 2-nitroaniline (2-NA) as a model reaction and exhibited excellent catalytic activity and stability. The presence of center-radially large mesopores in the NH2-HMSNs may favor the loading of noble metal NPs with high density and well-dispersed distribution on the surface of large mesopores of NH2-HMSNs. Metal–NH2-HMSNs may be more promising composite catalysts due to their superstructure of center-radially hierarchical mesopores that maybe significantly enhance and harmonize the diffusion of guest molecules of different sizes through the porous matrices.
Rights: © The Royal Society of Chemistry 2012
DOI: 10.1039/c1nr11504a
Published version: http://dx.doi.org/10.1039/c1nr11504a
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Chemical Engineering publications

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