"Soluble": Vs. "insoluble" Prussian blue based catalysts: Influence on Fenton-type treatment

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 usin...

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Autores principales: Doumic, L.I., Salierno, G., Ramos, C., Haure, P.M., Cassanello, M.C., Ayude, M.A.
Formato: JOUR
Materias:
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
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_20462069_v6_n52_p46625_Doumic
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_20462069_v6_n52_p46625_Doumic
record_format dspace
spelling todo:paper_20462069_v6_n52_p46625_Doumic2023-10-03T16:38:39Z "Soluble": Vs. "insoluble" Prussian blue based catalysts: Influence on Fenton-type treatment Doumic, L.I. Salierno, G. Ramos, C. Haure, P.M. Cassanello, M.C. Ayude, M.A. 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 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. Fil:Ramos, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cassanello, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ayude, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_20462069_v6_n52_p46625_Doumic
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic 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
spellingShingle 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
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
topic_facet 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
description 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.
format JOUR
author Doumic, L.I.
Salierno, G.
Ramos, C.
Haure, P.M.
Cassanello, M.C.
Ayude, M.A.
author_facet Doumic, L.I.
Salierno, G.
Ramos, C.
Haure, P.M.
Cassanello, M.C.
Ayude, M.A.
author_sort Doumic, L.I.
title "Soluble": Vs. "insoluble" Prussian blue based catalysts: Influence on Fenton-type treatment
title_short "Soluble": Vs. "insoluble" Prussian blue based catalysts: Influence on Fenton-type treatment
title_full "Soluble": Vs. "insoluble" Prussian blue based catalysts: Influence on Fenton-type treatment
title_fullStr "Soluble": Vs. "insoluble" Prussian blue based catalysts: Influence on Fenton-type treatment
title_full_unstemmed "Soluble": Vs. "insoluble" Prussian blue based catalysts: Influence on Fenton-type treatment
title_sort "soluble": vs. "insoluble" prussian blue based catalysts: influence on fenton-type treatment
url http://hdl.handle.net/20.500.12110/paper_20462069_v6_n52_p46625_Doumic
work_keys_str_mv AT doumicli solublevsinsolubleprussianbluebasedcatalystsinfluenceonfentontypetreatment
AT saliernog solublevsinsolubleprussianbluebasedcatalystsinfluenceonfentontypetreatment
AT ramosc solublevsinsolubleprussianbluebasedcatalystsinfluenceonfentontypetreatment
AT haurepm solublevsinsolubleprussianbluebasedcatalystsinfluenceonfentontypetreatment
AT cassanellomc solublevsinsolubleprussianbluebasedcatalystsinfluenceonfentontypetreatment
AT ayudema solublevsinsolubleprussianbluebasedcatalystsinfluenceonfentontypetreatment
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