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Abstract:

The influence of the synthesis procedure of supported Prussian blue nanoparticles (PBNP) on their activity and stability as a Fenton-type catalyst is studied. Hence, two catalysts are synthesized by adsorbing onto a support of PBNP formed ex situ through the reaction between FeCl3 and K3Fe(CN)6 using H2O2 as reducing agent, and following different washing protocols. A third catalyst is prepared through a two-step impregnation process with FeCl3 and K4[Fe(CN)6] aqueous solutions. The catalysts are tested in the orange G Fenton-type oxidation. The fresh and used catalysts are characterized by BET surface area, SEM, EDS, TEM, Mössbauer spectroscopy, total iron content and UV-vis spectrophotometry. It is demonstrated that under the synthesis conditions employed, the "insoluble" form of Prussian blue is promoted in the ex situ procedure, whereas the two-step impregnation process leads to the "soluble" Prussian blue formation. The washing of the just-prepared catalysts at the reaction temperature helps in eliminating the unreacted species. Those catalysts based on "insoluble" Prussian blue nanoparticles exhibit better behaviour in terms of stability. Significant removals are attained (100% azo dye, 60% TOC), at pH = 3, 343 K after thirteen successive cycles of 300 min. The best catalyst displays the smallest amount of total "free" Fe leached without releasing PBNP, ferrocyanide or ferricyanide ions into the reaction media. Reversible adsorption-desorption of organic intermediates avoids the loss of activity due to blockage of sites and/or pores. © 2016 The Royal Society of Chemistry.

Registro:

Documento: Artículo
Título:"Soluble": Vs. "insoluble" Prussian blue based catalysts: Influence on Fenton-type treatment
Autor:Doumic, L.I.; Salierno, G.; Ramos, C.; Haure, P.M.; Cassanello, M.C.; Ayude, M.A.
Filiación:División Catalizadores y Superficies, Instituto de Investigaciones en Ciencia y Tecnología de Materiales-INTEMA, Departamento de Ingeniería Química, Universidad Nacional de Mar Del Plata J.B. Justo 4302, Mar del Plata, 7600, Argentina
Laboratorio de Reactores y Sistemas para la Industria-LARSI, Departamento Industrias, Facultad Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2620, C1428BGA, Buenos Aires, Argentina
GIyA, Centro Atómico Constituyentes, CNEA 1600, San-Martín, Argentina
Palabras clave:Azo dyes; Impregnation; Nanoparticles; Oxidation; Solutions; Synthesis (chemical); Washing; Fenton type oxidation; Organic intermediates; Prussian blue nanoparticles; Reversible adsorption; Ssbauer spectroscopies; Synthesis conditions; Two-step impregnation; UV-vis spectrophotometry; Catalysts
Año:2016
Volumen:6
Número:52
Página de inicio:46625
Página de fin:46633
DOI: http://dx.doi.org/10.1039/c6ra06618f
Título revista:RSC Advances
Título revista abreviado:RSC Adv.
ISSN:20462069
CODEN:RSCAC
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20462069_v6_n52_p46625_Doumic

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Citas:

---------- APA ----------
Doumic, L.I., Salierno, G., Ramos, C., Haure, P.M., Cassanello, M.C. & Ayude, M.A. (2016) . "Soluble": Vs. "insoluble" Prussian blue based catalysts: Influence on Fenton-type treatment. RSC Advances, 6(52), 46625-46633.
http://dx.doi.org/10.1039/c6ra06618f
---------- CHICAGO ----------
Doumic, L.I., Salierno, G., Ramos, C., Haure, P.M., Cassanello, M.C., Ayude, M.A. ""Soluble": Vs. "insoluble" Prussian blue based catalysts: Influence on Fenton-type treatment" . RSC Advances 6, no. 52 (2016) : 46625-46633.
http://dx.doi.org/10.1039/c6ra06618f
---------- MLA ----------
Doumic, L.I., Salierno, G., Ramos, C., Haure, P.M., Cassanello, M.C., Ayude, M.A. ""Soluble": Vs. "insoluble" Prussian blue based catalysts: Influence on Fenton-type treatment" . RSC Advances, vol. 6, no. 52, 2016, pp. 46625-46633.
http://dx.doi.org/10.1039/c6ra06618f
---------- VANCOUVER ----------
Doumic, L.I., Salierno, G., Ramos, C., Haure, P.M., Cassanello, M.C., Ayude, M.A. "Soluble": Vs. "insoluble" Prussian blue based catalysts: Influence on Fenton-type treatment. RSC Adv. 2016;6(52):46625-46633.
http://dx.doi.org/10.1039/c6ra06618f