From support to shell: An innovative design of air-stable nano zero-valent iron–nickel catalysts via structural self-assembly

  • This work presents the design of air-stable core–shell zero-valent iron–nickel nanofilaments supported on silica and zeolite, developed to overcome the oxidation limitations of nano zero-valent iron in environmental catalysis. The nanofilaments feature ∼ 100 nm iron–nickel cores surrounded by ultrafine iron-rich threads embedded with aluminates and silicates, originating from partial support dissolution during synthesis. By varying the iron reduction time, three catalysts were prepared: one on silica reduced for 30 min, and two on zeolite reduced for 30 and 15 min. They were thoroughly characterized using nitrogen physisorption, X-ray diffraction, electron microscopy with elemental analysis, Mössbauer spectroscopy, and small-angle X-ray scattering. The zeolite-supported catalyst reduced for 15 min showed the highest activity for hexavalent chromium reduction (rate constant 8.054 min−1), attributed to a higher fraction of reactive iron–nickel phases formed under shorter reduction. ItsThis work presents the design of air-stable core–shell zero-valent iron–nickel nanofilaments supported on silica and zeolite, developed to overcome the oxidation limitations of nano zero-valent iron in environmental catalysis. The nanofilaments feature ∼ 100 nm iron–nickel cores surrounded by ultrafine iron-rich threads embedded with aluminates and silicates, originating from partial support dissolution during synthesis. By varying the iron reduction time, three catalysts were prepared: one on silica reduced for 30 min, and two on zeolite reduced for 30 and 15 min. They were thoroughly characterized using nitrogen physisorption, X-ray diffraction, electron microscopy with elemental analysis, Mössbauer spectroscopy, and small-angle X-ray scattering. The zeolite-supported catalyst reduced for 15 min showed the highest activity for hexavalent chromium reduction (rate constant 8.054 min−1), attributed to a higher fraction of reactive iron–nickel phases formed under shorter reduction. Its tailored core–shell structure improves air stability and surface reactivity, highlighting its potential as a next-generation zero-valent iron nanocatalyst for aqueous remediationzeige mehrzeige weniger

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Autor*innen:Leydi del Rocío Silva-CalpaORCiD, Andrelaine de Souza Bernardes, Roberto Ribeiro de AvillezORCiD, Glen J. SmalesORCiD, Mariella Alzamora CamarenaORCiD, Carla Ramos MoreiraORCiD, Volodymyr ZaitsevORCiD, Braulio Soares ArchanjoORCiD, Sonia LetichevskyORCiD
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Materials Today Communications
Jahr der Erstveröffentlichung:2025
Organisationseinheit der BAM:6 Materialchemie
6 Materialchemie / 6.5 Synthese und Streuverfahren nanostrukturierter Materialien
Verlag:Elsevier Ltd.
Jahrgang/Band:49
Aufsatznummer:114142
Erste Seite:1
Letzte Seite:15677
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Freie Schlagwörter:Air-stable nanomaterials; Core–shell nanostructures; Hexavalent chromium reduction; MOUSE; Structure-controlled FeNi nanoparticles; X-ray scattering; nanofilaments
Themenfelder/Aktivitätsfelder der BAM:Material
Material / Advanced Materials
DOI:10.1016/j.mtcomm.2025.114142
ISSN:2352-4928
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:11.12.2025
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:11.12.2025
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