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Mesoporous Au–TiO2 Nanoparticle Assemblies as Efficient Catalysts for the Chemoselective Reduction of Nitro Compounds

Published online by Cambridge University Press:  18 March 2014

Ioannis Tamiolakis ,
Ioannis N. Lykakis  and
Gerasimos S. Armatas
Ioannis Tamiolakis
Affiliation:
Department of Materials Science and Technology, University of Crete, Heraklion 71003, Greece.
Ioannis N. Lykakis
Affiliation:
Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
Gerasimos S. Armatas*
Affiliation:
Department of Materials Science and Technology, University of Crete, Heraklion 71003, Greece.
*
*Email: garmatas@materials.uoc.gr
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Abstract

Here, we propose novel mesoporous Au-loaded TiO2 nanoparticle assemblies (Au-MTA) as highly effective catalysts for the reduction of nitroaromatic compounds into the corresponding aryl amine products. The obtained materials possess a continuous network of interconnected gold and anatase TiO2 (ca. 9 nm in size) nanoparticles with controllable gold particle size (i.e. ranging from ∼3.2 to ∼9.4 nm) and exhibit large and accessible pore surface area (ca. 100–160 m2/g), as evidenced by SAXS, XRD, TEM and N2 physisorption measurements. Interestingly, the Au-MTA mesophases have exhibited remarkable activity and selectivity for the reduction of nitro into amine groups using NaBH4 as reducing agent. Indeed, the Au loading and particle size have a key effect on hydrogenation reactions, affecting significantly the yield and product composition.

Keywords

nanostructurecatalyticAu
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1641: Symposium AA – Catalytic Nanomaterials for Energy and Environment , 2014 , mrsf13-1641-aa06-18
Copyright
Copyright © Materials Research Society 2014 

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References

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