Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-26T14:41:57.474Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access

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 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Vogt, P.F. and Gerulis, J.J.. Ullmann’s Encyclopedia of Industrial Chemistry, Aromatic Amines, (Wiley-VCH Verlag GmbH & Co., Weinheim, 2005).Google Scholar
Ke, X., Zhang, X., Zhao, J., Sarina, S., Barry, J. and Zhu, H., Green. Chem. 15, 236 (2013).CrossRefGoogle Scholar
Stratakis, M. and Garcia, H., Chem. Rev. 112, 4469 (2012).CrossRefGoogle Scholar
Zhang, Y., Cui, X.J., Shi, F. and Deng, Y.Q., Chem. Rev. 112, 2467 (2012).CrossRefGoogle Scholar
Mitsudome, T. and Kaneda, K., Green Chem. 15, 2636 (2013).CrossRefGoogle Scholar
Corma, A. and Serna, P., Science 313, 332 (2006).CrossRefGoogle Scholar
Tamiolakis, I., Lykakis, I., Katsoulidis, A. and Armatas, G.S., Chem. Commun. 48, 6687 (2012).CrossRefGoogle Scholar
Tamiolakis, I, Fountoulaki, S., Vordos, N., Lykakis, I.N. and Armatas, G.S., J. Mater. Chem. A. 1, 14311 (2013).CrossRefGoogle Scholar