Co2SnO4 nanoparticles as a high performance catalyst for oxidative degradation of rhodamine B dye and pentachlorophenol by activation of peroxymonosulfate

Monaam Ben Ali; Alexandre Barras; Ahmed Addad; Brigitte Sieber; Habib Elhouichet; Mokhtar Férid; Sabine Szunerits; Rabah Boukherroub

doi:10.1039/c6cp08576h

Co₂SnO₄ nanoparticles as a high performance catalyst for oxidative degradation of rhodamine B dye and pentachlorophenol by activation of peroxymonosulfate

Phys Chem Chem Phys. 2017 Mar 1;19(9):6569-6578. doi: 10.1039/c6cp08576h.

Authors

Monaam Ben Ali¹, Alexandre Barras², Ahmed Addad³, Brigitte Sieber³, Habib Elhouichet⁴, Mokhtar Férid⁵, Sabine Szunerits², Rabah Boukherroub²

Affiliations

¹ Univ. Lille, CNRS, Centrale Lille, ISEN, Univ. Valenciennes, UMR 8520 - IEMN, F-59000 Lille, France. rabah.boukherroub@iemn.univ-lille1.fr and Laboratoire de Physico-Chimie des Matériaux Minéraux et leurs Applications, Centre National de Recherches en Sciences des Matériaux, B.P. 95 Hammam-Lif, 2050, Tunisia and Département de Physique, Faculté des Sciences de Tunis, Université Tunis-El Manar 2092, Tunisia.
² Univ. Lille, CNRS, Centrale Lille, ISEN, Univ. Valenciennes, UMR 8520 - IEMN, F-59000 Lille, France. rabah.boukherroub@iemn.univ-lille1.fr.
³ UMET, UMR CNRS 8207, Université Lille 1, 59655 Villeneuve d'Ascq Cédex, France.
⁴ Laboratoire de Physico-Chimie des Matériaux Minéraux et leurs Applications, Centre National de Recherches en Sciences des Matériaux, B.P. 95 Hammam-Lif, 2050, Tunisia and Département de Physique, Faculté des Sciences de Tunis, Université Tunis-El Manar 2092, Tunisia.
⁵ Laboratoire de Physico-Chimie des Matériaux Minéraux et leurs Applications, Centre National de Recherches en Sciences des Matériaux, B.P. 95 Hammam-Lif, 2050, Tunisia.

PMID: 28203655
DOI: 10.1039/c6cp08576h

Abstract

Spinel Co₂SnO₄ nanoparticles are synthesized by a facile hydrothermal route in alkaline solution using SnCl₄ and CoCl₂ as precursors. The structure, morphology and chemical composition of the nanoparticles are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray (EDX), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA). The catalytic performance of the Co₂SnO₄ nanoparticles is thoroughly evaluated for peroxymonosulfate (PMS) activation for removal of rhodamine B (RhB) and pentachlorophenol (PCP) from water. The influence of different process parameters on the RhB degradation efficiency is examined and the catalytic stability is evaluated. Under optimized conditions, the Co₂SnO₄/PMS system is very efficient with a full degradation of RhB and PCP in less than 10 min at room temperature, as revealed by high performance liquid chromatography (HPLC) analysis. Quenching experiments suggested that sulfate radicals (SO₄˙^-) are the main active species in the degradation process. Moreover, the Co₂SnO₄ catalyst is stable without any apparent activity loss after 5 cycling runs.