{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,11]],"date-time":"2026-04-11T18:15:52Z","timestamp":1775931352135,"version":"3.50.1"},"reference-count":56,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2024,6,27]],"date-time":"2024-06-27T00:00:00Z","timestamp":1719446400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Portuguese Foundation for Science and Technology (FCT)","doi-asserted-by":"publisher","award":["UIDB\/04650\/2020"],"award-info":[{"award-number":["UIDB\/04650\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Portuguese Foundation for Science and Technology (FCT)","doi-asserted-by":"publisher","award":["UIDP\/04650\/2020"],"award-info":[{"award-number":["UIDP\/04650\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Portuguese Foundation for Science and Technology (FCT)","doi-asserted-by":"publisher","award":["UIDB\/04469\/2020"],"award-info":[{"award-number":["UIDB\/04469\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Portuguese Foundation for Science and Technology (FCT)","doi-asserted-by":"publisher","award":["UIDP\/04469\/2020"],"award-info":[{"award-number":["UIDP\/04469\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Portuguese Foundation for Science and Technology (FCT)","doi-asserted-by":"publisher","award":["2021.08418.BD"],"award-info":[{"award-number":["2021.08418.BD"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Water pollution is a major environmental challenge. Due to the inefficiency of conventional wastewater treatment plants in degrading many organic complex compounds, these recalcitrant pollutants end up in rivers, lakes, oceans and other bodies of water, affecting the environment and human health. Semiconductor photocatalysis is considered an efficient complement to conventional methods, and the use of various nanomaterials for this purpose has been widely explored, with a particular focus on improving their activity under visible light. This work focuses on developing magnetic and photoactive zinc\/magnesium mixed ferrites (Zn0.5Mg0.5Fe2O4) by sol-gel and solvothermal synthesis methods, which are two of the most important and efficient methods used for the synthesis of ferrite nanoparticles. The nanoparticles (NPs) synthesized by the sol-gel method exhibited an average size of 14.7 nm, while those synthesized by the solvothermal method had an average size of 17.4 nm. Both types possessed a predominantly cubic structure and demonstrated superparamagnetic behavior, reaching a magnetization saturation value of 60.2 emu g\u22121. Due to the high recombination rate of electrons\/holes, which is an intrinsic feature of ferrites, surface functionalization with silver was carried out to enhance charge separation. The results demonstrated a strong influence of adsorption and of the deposition of silver. Several optimization steps were performed during synthesis, allowing us to create efficient catalysts, as proved by the almost full removal of the dye malachite green attaining 95.0% (at a rate constant of 0.091 min\u22121) and 87.6% (at a rate constant of 0.017 min\u22121) using NPs obtained by the sol-gel and solvothermal methods, respectively. Adsorption in the dark accounted for 89.2% of the dye removal for nanoparticles prepared by sol-gel and 82.8% for the ones obtained by the solvothermal method. These results make mixed zinc\/magnesium ferrites highly promising for potential industrial application in effluent photoremediation using visible light.<\/jats:p>","DOI":"10.3390\/ma17133158","type":"journal-article","created":{"date-parts":[[2024,6,28]],"date-time":"2024-06-28T03:42:30Z","timestamp":1719546150000},"page":"3158","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Zinc\/Magnesium Ferrite Nanoparticles Functionalized with Silver for Optimized Photocatalytic Removal of Malachite Green"],"prefix":"10.3390","volume":"17","author":[{"given":"Ricardo J. C.","family":"Fernandes","sequence":"first","affiliation":[{"name":"Physics Centre of Minho and Porto Universities (CF-UM-UP), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal"},{"name":"LaPMET\u2014Associate Laboratory, 4169-007 Porto, Portugal"},{"name":"CEB\u2014Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal"},{"name":"LABBELS\u2014Associate Laboratory, 4710-057 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9804-2553","authenticated-orcid":false,"given":"Beatriz D.","family":"Cardoso","sequence":"additional","affiliation":[{"name":"Physics Centre of Minho and Porto Universities (CF-UM-UP), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6094-1713","authenticated-orcid":false,"given":"Ana Rita O.","family":"Rodrigues","sequence":"additional","affiliation":[{"name":"Physics Centre of Minho and Porto Universities (CF-UM-UP), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal"},{"name":"LaPMET\u2014Associate Laboratory, 4169-007 Porto, Portugal"}]},{"given":"Ana","family":"Pires","sequence":"additional","affiliation":[{"name":"LaPMET\u2014Associate Laboratory, 4169-007 Porto, Portugal"},{"name":"IFIMUP\u2014Materials Physics Institute, University of Porto, R. Campo Alegre, 4169-007 Porto, Portugal"}]},{"given":"Andr\u00e9 M.","family":"Pereira","sequence":"additional","affiliation":[{"name":"LaPMET\u2014Associate Laboratory, 4169-007 Porto, Portugal"},{"name":"IFIMUP\u2014Materials Physics Institute, University of Porto, R. Campo Alegre, 4169-007 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1646-7727","authenticated-orcid":false,"given":"Jo\u00e3o P.","family":"Ara\u00fajo","sequence":"additional","affiliation":[{"name":"LaPMET\u2014Associate Laboratory, 4169-007 Porto, Portugal"},{"name":"IFIMUP\u2014Materials Physics Institute, University of Porto, R. Campo Alegre, 4169-007 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1396-9078","authenticated-orcid":false,"given":"Luciana","family":"Pereira","sequence":"additional","affiliation":[{"name":"CEB\u2014Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal"},{"name":"LABBELS\u2014Associate Laboratory, 4710-057 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4426-9207","authenticated-orcid":false,"given":"Paulo J. G.","family":"Coutinho","sequence":"additional","affiliation":[{"name":"Physics Centre of Minho and Porto Universities (CF-UM-UP), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal"},{"name":"LaPMET\u2014Associate Laboratory, 4169-007 Porto, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2024,6,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1005","DOI":"10.1016\/j.spc.2022.08.026","article-title":"\u2018Urban residents\u2019 acceptance of recycled water: An improved innovation-decision model considering the needs satisfied and social characteristics","volume":"33","author":"Li","year":"2022","journal-title":"Sustain. Prod. Consum."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"100153","DOI":"10.1016\/j.crsust.2022.100153","article-title":"Resource nexus oriented decision making along the textile value chain: The case of wastewater management","volume":"4","author":"Gomes","year":"2022","journal-title":"Curr. 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