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Issue 104, 2016, Issue in Progress
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Alkaline niobates ANbO3 (A = Li, Na, K) as heterogeneous catalysts for dipropyl sulfide oxidation

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Abstract

Alkaline ANbO3 (A = Li, Na, K) niobates with perovskite-type structure were prepared by a sol gel method, characterized by XRD, BET, TG/DTA, O2-TPD, DRS UV-Vis and FTIR and evaluated as heterogeneous catalysts for the selective oxidation of dipropyl sulfide (DPS) to its corresponding sulfoxide. The effects of different reaction parameters were evaluated, such as catalyst weight, the solvent and oxidant nature, reaction temperature and reuse. In order to gain better knowledge of the oxidation process, a kinetic study of the reaction was carried out. The global pseudo first order constant, the initial reaction rate and the apparent activation energy were calculated, and simplified reaction steps are proposed. KNbO3 showed the highest catalytic activity and sulfoxide selectivity with a periodic trend of KNbO3 > NaNbO3 ∼ LiNbO3.

Graphical abstract: Alkaline niobates ANbO3 (A = Li, Na, K) as heterogeneous catalysts for dipropyl sulfide oxidation

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Publication details

The article was received on 30 Aug 2016, accepted on 19 Oct 2016 and first published on 20 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA21749D
RSC Adv., 2016,6, 102015-102022

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    Alkaline niobates ANbO3 (A = Li, Na, K) as heterogeneous catalysts for dipropyl sulfide oxidation

    C. Leal Marchena, C. Saux, R. Dinamarca, G. Pecchi and L. Pierella, RSC Adv., 2016, 6, 102015
    DOI: 10.1039/C6RA21749D

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