Issue 3, 2014
From the journal:

Catalysis Science & Technology

Ce1−xSmxO1.9−δ nanoparticles obtained by microwave-assisted hydrothermal processing: an efficient application for catalytic oxidation of α-bisabolol

A. G. M. Silva,a   T. S. Rodrigues,a   A. Dias,a   H. V. Fajardo,a   R. F. Gonçalves,b   M. Godinhob  and  P. A. Robles-Dutenhefner*c  

* Corresponding authors

a Departamento de Química, Universidade Federal de Ouro Preto, Morro do Cruzeiro, Ouro Preto, MG, Brazil

b Departamento de Química, Universidade Federal de Goiás, CAC/UFG, Catalão, GO, Brazil

c Departamento de Química, ICEX, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG, Brazil
E-mail: pard@ufmg.br

Abstract

Heterogeneous catalysts based on Sm-doped ceria were employed for the first time in the liquid-phase oxidation of α-bisabolol. Nanometer-sized catalysts were obtained by microwave-hydrothermal synthesis and were characterized by X-ray diffraction (XRD), temperature programmed reduction (TPR), Raman spectroscopy and N2-physisorption. The influence of Sm doping, temperature and the solvent used on the catalytic behavior was investigated. Conversions up to 84% and a combined selectivity for the products up to 77% were obtained for Ce0.9Sm0.15O1.85−δ catalysts. The reactions were highly selective for the epoxidation products (only bisabolol oxides A and B were obtained) and shown to be strongly dependent on the temperature and solvent employed. Best results were achieved for higher Sm concentrations, which indicate that changes in the textural properties due to doping produced a significantly more active catalyst.

Graphical abstract: Ce1−xSmxO1.9−δ nanoparticles obtained by microwave-assisted hydrothermal processing: an efficient application for catalytic oxidation of α-bisabolol

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Article information

DOI
https://doi.org/10.1039/C3CY00788J
Article type
Paper
Submitted
09 Oct 2013
Accepted
21 Dec 2013
First published
02 Jan 2014

Catal. Sci. Technol., 2014,4, 814-821

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Ce1−xSmxO1.9−δ nanoparticles obtained by microwave-assisted hydrothermal processing: an efficient application for catalytic oxidation of α-bisabolol

A. G. M. Silva, T. S. Rodrigues, A. Dias, H. V. Fajardo, R. F. Gonçalves, M. Godinho and P. A. Robles-Dutenhefner, Catal. Sci. Technol., 2014, 4, 814 DOI: 10.1039/C3CY00788J

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