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Organic–Inorganic Hybrid SiO2 Supported Gold Nanoparticles: Facile Preparation and Catalytic Hydrogenation of Aromatic Nitro Compounds

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Abstract

Highly dispersed gold nanoparticles supported on organic–inorganic hybrid silica have been successfully prepared through a novel and facile approach. In the process, 3-aminopropyltriethoxysilane was hydrolyzed in HCHO aqueous solution to prepare silica with organic functional groups (–SiCH2CH2CH2NHCH2OH) formed through the reaction between –NH2 and HCHO, then the silica reacted with HAuCl4 in aqueous solution. Due to the reducibility of –SiCH2CH2CH2NHCH2OH, the gold precursor was in situ reduced on the silica. The materials were characterized by powder X-ray diffraction, transmission electron microscopy, Fourier-transform infrared spectroscopy, solid-state nuclear magnetic resonance spectroscopy, and X-ray photoelectron spectroscopy techniques. The results indicated Au nanoparticles were highly dispersed on silica with an average particles size 1.8 ± 0.5 nm. The as-obtained Au/SiO2-org exhibited good catalytic activity and stability for liquid phase catalytic hydrogenation of aromatic nitro compounds with H2.

Graphical Abstract

Highly dispersed gold nanoparticles supported on organic-inorganic hybrid silica have been successfully prepared through a new facile approach. In the process, one-pot preparation of SiO2-org with –SiCH2CH2CH2NHCH2OH groups and in situ reduction of gold ions in aqueous solution to form gold nanoparticles on SiO2-org are performed. The as-obtained catalysts with Au particles in size of 1.8±0.5 nm show high activity and selectivity for hydrogenation of aromatic nitro-compounds.

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Acknowledgments

This study was supported by the National Natural Science Foundation of China (20906008 and 21176037), the Science Foundation of Dalian University of technology (DUTSF200805) and the Fundamental Research Funds for the Central Universities (DUT09RC(3)158 and DUT12LK30).

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Authors and Affiliations

  1. Laboratory of Advanced Materials and Catalytic Engineering, School of Chemistry, Dalian University of Technology, Dalian, 116024, China

    Xiaoying Tan, Zhixin Zhang, Zihui Xiao, Qiang Xu, Changhai Liang & Xinkui Wang

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  1. Xiaoying Tan
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  2. Zhixin Zhang
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  3. Zihui Xiao
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  4. Qiang Xu
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  5. Changhai Liang
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  6. Xinkui Wang
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Correspondence to Xinkui Wang.

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Tan, X., Zhang, Z., Xiao, Z. et al. Organic–Inorganic Hybrid SiO2 Supported Gold Nanoparticles: Facile Preparation and Catalytic Hydrogenation of Aromatic Nitro Compounds. Catal Lett 142, 788–793 (2012). https://doi.org/10.1007/s10562-012-0821-5

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  • DOI: https://doi.org/10.1007/s10562-012-0821-5

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