Journal
APPLIED CATALYSIS A-GENERAL
Volume 381, Issue 1-2, Pages 36-41Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2010.03.036
Keywords
Goethite; Nickel; Oxidation; Petroleum
Categories
Funding
- Petrobras
- CAPQ-DQI (UFLA)
- Fapemig
- CNPq
- CAPES
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Samples of Ni-doped goethites were prepared and characterized by Mossbauer spectroscopy, IV, XRD, TPR and BET surface area measurements. Mossbauer data evidenced the incorporation of Ni2+ in the goethite structure, and this cation-doping caused a significant decrease of the chemical reduction temperature in the TPR process. The catalytic behavior of these Fe1-xNixOOH materials was investigated for the H2O2 decomposition to O-2 and the oxidation of quinoline. The successive hydroxylation of quinoline during this oxidation strongly suggests that highly reactive hydroxyl radicals are generated during the reaction involving H2O2 on the Ni-goethite grain surface, also confirming that these materials are efficient heterogeneous Fenton catalysts. (C) 2010 Elsevier B.V. All rights reserved.
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