{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,26]],"date-time":"2026-04-26T05:24:04Z","timestamp":1777181044039,"version":"3.51.4"},"reference-count":26,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2020,12,30]],"date-time":"2020-12-30T00:00:00Z","timestamp":1609286400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","award":["UID\/QUI\/0686\/2016"],"award-info":[{"award-number":["UID\/QUI\/0686\/2016"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Catalysts"],"abstract":"<jats:p>Dye compounds are becoming a problematic class of pollutants for the environment, so it is important to develop stable catalysts for their elimination. First, several studies were performed with different Y zeolites (NaY, (NH4)Y and USY) in order to select the best support for the preparation of the bimetallic catalysts. In particular, NaY zeolite was used as the support for Fe, Cu and Mn metals to prepare mono and bimetallic Fenton-type catalysts by the ion exchange method. The catalysts were characterized by several techniques, such as chemical analysis, nitrogen physisorption, X-ray diffraction (XRD), scanning electron microscopy (SEM) and cyclic voltammetry studies. Characterization results revealed that the metals were successfully ion-exchanged within the NaY zeolite. The prepared catalysts were tested for the aqueous-phase degradation of dye compounds (Procion yellow (PY) and Tartrazine (Tar)) at atmospheric pressure and different temperatures, using H2O2 as the oxidant. All the investigated samples were found to be active in degrading the dyes through the Fenton-type process; however, the oxidation rate was found to be higher in the presence of the bimetallic catalysts. CuFe-NaY displays the best mineralization rate for PY oxidation while MnFe-NaY shows the highest activity for Tar degradation. This work may provide further insight into the design of Fenton-type bimetallic catalysts with improved catalytic properties for environmental remediation.<\/jats:p>","DOI":"10.3390\/catal11010032","type":"journal-article","created":{"date-parts":[[2020,12,30]],"date-time":"2020-12-30T09:35:23Z","timestamp":1609320923000},"page":"32","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Fenton-Type Bimetallic Catalysts for Degradation of Dyes in Aqueous Solutions"],"prefix":"10.3390","volume":"11","author":[{"given":"Bebiana L. C.","family":"Santos","sequence":"first","affiliation":[{"name":"CQUM, Centro de Qu\u00edmica, Departamento de Qu\u00edmica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal"},{"name":"Departamento de Qu\u00edmica, Faculdade de Ci\u00eancias, Universidade Agostinho Neto, Av. 4 de Fevereiro, 71, Luanda, Angola"}]},{"given":"Pier","family":"Parpot","sequence":"additional","affiliation":[{"name":"CQUM, Centro de Qu\u00edmica, Departamento de Qu\u00edmica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal"},{"name":"CEB, Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9015-1237","authenticated-orcid":false,"given":"Ol\u00edvia S. G. P.","family":"Soares","sequence":"additional","affiliation":[{"name":"Laborat\u00f3rio Associado LSRE-LCM, Departamento de Engenharia Qu\u00edmica, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5447-2471","authenticated-orcid":false,"given":"Manuel F. R.","family":"Pereira","sequence":"additional","affiliation":[{"name":"Laborat\u00f3rio Associado LSRE-LCM, Departamento de Engenharia Qu\u00edmica, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"}]},{"given":"Elisabetta","family":"Rombi","sequence":"additional","affiliation":[{"name":"Dipartimento di Scienze Chimiche e Geologiche, Universit\u00e0 di Cagliari, Complesso Universitario di Monserrato, S.S. 554 bivio Sestu, 09042 Monserrato, Italy"}]},{"given":"Ant\u00f3nio M.","family":"Fonseca","sequence":"additional","affiliation":[{"name":"CQUM, Centro de Qu\u00edmica, Departamento de Qu\u00edmica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal"},{"name":"CEB, Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9705-9444","authenticated-orcid":false,"given":"Isabel","family":"Correia Neves","sequence":"additional","affiliation":[{"name":"CQUM, Centro de Qu\u00edmica, Departamento de Qu\u00edmica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal"},{"name":"CEB, Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2020,12,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1016\/j.apcatb.2004.11.014","article-title":"Interaction of adsorption and catalytic reactions in water decontamination processes Part I: Oxidation of organic contaminants with hydrogen peroxide catalyzed by activated carbon","volume":"58","author":"Georgi","year":"2005","journal-title":"Appl. Catal. B Environ."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1016\/S0304-3894(02)00282-0","article-title":"A review of classic Fenton\u2019s peroxidation as an advanced oxidation technique","volume":"98","author":"Neyens","year":"2003","journal-title":"J. Hazard. Mater."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"501","DOI":"10.1016\/S1093-0191(03)00032-7","article-title":"A review of imperative technologies for wastewater treatment I: Oxidation technologies at ambient conditions","volume":"8","author":"Gogate","year":"2004","journal-title":"Adv. Environ. Res."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"341","DOI":"10.1163\/156856797X00565","article-title":"The photo-fenton oxidation\u2014a cheap and efficient wastewater treatment method","volume":"23","author":"Bauer","year":"1997","journal-title":"Res. Chem. Intermed."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"128291","DOI":"10.1016\/j.chemosphere.2020.128291","article-title":"Evaluation of toxicity and mutagenicity of a synthetic effluent containing azo dye after advanced oxidation process treatment","volume":"263","author":"Alderete","year":"2020","journal-title":"Chemosphere"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1016\/j.envint.2014.10.027","article-title":"An overview on the advanced oxidation processes applied for the treatment of water pollutants defined in the recently launched Directive 2013\/39\/EU","volume":"75","author":"Ribeiro","year":"2015","journal-title":"Environ. Int."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"44","DOI":"10.1016\/j.apcata.2011.03.005","article-title":"Indications of the reactive species in a heterogeneous fenton-like reaction using Fe-containing zeolites","volume":"398","author":"Holzer","year":"2011","journal-title":"Appl. Catal. A Gen."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"687","DOI":"10.1016\/j.apcatb.2014.10.073","article-title":"Degradation of acetic acid by heterogeneous Fenton-like oxidation over iron-containing ZSM-5 zeolites","volume":"165","author":"Cihanoglu","year":"2015","journal-title":"Appl. Catal. B Environ."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"411","DOI":"10.1016\/j.apcatb.2013.09.032","article-title":"Effects of reducing agents on the degradation of 2,4,6-tribromophenol in a heterogeneous Fenton-like system with an iron-loaded natural zeolite","volume":"147","author":"Fukuchi","year":"2014","journal-title":"Appl. Catal. B Environ."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"323","DOI":"10.1016\/j.apcatb.2016.06.040","article-title":"Cu and Fe oxides dispersed on SBA-15: A Fenton type bimetallic catalyst for N, N-diethyl-p-phenyl diamine degradation","volume":"199","author":"Karthikeyan","year":"2016","journal-title":"Appl. Catal. B Environ."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"192","DOI":"10.1016\/j.apcatb.2013.04.028","article-title":"Azo-dye orange II degradation by the heterogeneous Fenton-like process using a zeolite Y-Fe catalyst-Kinetics with a model based on the Fermi\u2019s equation","volume":"146","author":"Rache","year":"2014","journal-title":"Appl. Catal. B Environ."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"316","DOI":"10.1016\/j.apcatb.2017.02.032","article-title":"In-situ incorporation of iron-copper bimetallic particles in electrospun carbon nanofibers as an efficient Fenton catalyst","volume":"207","author":"Wang","year":"2017","journal-title":"Appl. Catal. B Environ."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1202","DOI":"10.1016\/j.trac.2010.07.011","article-title":"An analytical overview of processes for removing organic dyes from wastewater effluents","volume":"29","author":"Larrechi","year":"2010","journal-title":"TrAC Trends Anal. Chem."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1016\/j.apcatb.2004.01.020","article-title":"Effect of dealumination of iron(III)-exchanged Y zeolites on oxidation of reactive yellow 84 azo dye in the presence of hydrogen peroxide","volume":"51","author":"Neamtu","year":"2004","journal-title":"Appl. Catal. B Environ."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"135","DOI":"10.1016\/j.dyepig.2004.05.004","article-title":"Degradation of C.I. reactive orange 4 and its simulated dye bath wastewater by heterogeneous photocatalysis","volume":"64","author":"Pinto","year":"2005","journal-title":"Dye. Pigment."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"116","DOI":"10.1016\/j.apcatb.2013.12.011","article-title":"Two-step mineralization of tartrazine solutions: Study of parameters and by-products during the coupling of electrocoagulation with electrochemical advanced oxidation processes","volume":"150","author":"Thiam","year":"2014","journal-title":"Appl. Catal. B Environ."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"44","DOI":"10.1016\/j.apcatb.2006.08.012","article-title":"Fenton-like oxidation of orange II solutions using heterogeneous catalysts based on saponite clay","volume":"71","author":"Ramirez","year":"2007","journal-title":"Appl. Catal. B Environ."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"3754","DOI":"10.1002\/cctc.201800524","article-title":"Oxidation of volatile organic compounds by highly efficient metal zeolite catalysts","volume":"10","author":"Soares","year":"2018","journal-title":"ChemCatChem"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"411","DOI":"10.1016\/j.cej.2015.06.093","article-title":"Mono and bimetallic NaY catalysts with high performance in nitrate reduction in water","volume":"281","author":"Soares","year":"2015","journal-title":"Chem. Eng. J."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1016\/j.apcatb.2012.04.028","article-title":"Fenton-like degradation of 2, 4-dichlorophenol using Fe3O4 magnetic nanoparticles","volume":"123","author":"Xu","year":"2012","journal-title":"Appl. Catal. B Environ."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"6308","DOI":"10.1039\/b901762n","article-title":"Host\u2013guest chemistry of the (N, N0-diarylacetamidine) rhodium (III) complex in zeolite Y","volume":"11","author":"Fonseca","year":"2009","journal-title":"Phys. Chem. Chem. Phys."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"19042","DOI":"10.1021\/jp5031812","article-title":"Norbornene oxidation by chiral Complexes encapsulated in NaY zeolite","volume":"118","author":"Biernacka","year":"2014","journal-title":"J. Phys. Chem. C"},{"key":"ref_23","unstructured":"Llewellyn, P., Rodriguez-Reinoso, F., Rouquerol, J., and Seaton, N. (2007). \u201cIs the BET Equation Applicable to Microporous Adsorbents?\u201d, In Characterization of Porous Solids VII, Elsevier."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"3351","DOI":"10.1039\/C9TB00078J","article-title":"Synthesis, characterization and in vitro validation of a magnetic zeolite nanocomposite with T2-MRI properties towards theranostic applications","volume":"7","author":"Gallo","year":"2019","journal-title":"J. Mater. Chem. B"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"278","DOI":"10.1016\/j.electacta.2011.11.046","article-title":"Electrocatalytic oxidation of oxalic and oxamic acids in aqueous media at carbon nanotube modified electrodes","volume":"60","author":"Ferreira","year":"2012","journal-title":"Electrochim. Acta"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"284","DOI":"10.1021\/ie070990y","article-title":"Experimental design to optimize the oxidation of orange II dye solution using a clay-based fenton-like catalyst","volume":"47","author":"Ramirez","year":"2008","journal-title":"Ind. Eng. Chem. Res."}],"container-title":["Catalysts"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-4344\/11\/1\/32\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T10:47:53Z","timestamp":1760179673000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-4344\/11\/1\/32"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,12,30]]},"references-count":26,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2021,1]]}},"alternative-id":["catal11010032"],"URL":"https:\/\/doi.org\/10.3390\/catal11010032","relation":{},"ISSN":["2073-4344"],"issn-type":[{"value":"2073-4344","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,12,30]]}}}