161841 20251017144555.0 doi 10.1016/j.jmmm.2025.173288 sideral 144504 ART-2025-144504 eng Cuello, Natalia I. Maghemite and hematite nanowires synthesized by nanocasting: precursor effects on structural and magnetic properties 2025 Mesoporous iron oxides with tailored structural and magnetic properties were synthesized using the SBA-15 silica template and two different iron precursors: Fe(NO3)3·9H2O and Fe(C5H7O2)3, denoted as FeM-1 and FeM-2, respectively. The synthesis involved a two-step impregnation-calcination process followed by silica removal. Comprehensive characterization was performed using techniques such as nitrogen adsorption–desorption isotherms, TEM, SEM-EDX, XRD, XPS, and Mössbauer spectroscopy, as well as magnetic measurements. The results revealed significant differences in structural and magnetic properties between the two samples. FeM-1 exhibited higher structural order, greater homogeneity, and a single-phase α-Fe2O3 composition, whereas FeM-2 showed a bimodal pore size distribution and a dual-phase composition of α-Fe2O3 and ɣ-Fe2O3. Magnetic characterization indicated enhanced magnetization in FeM-2 due to the ferrimagnetic nature of ɣ-Fe2O3, while FeM-1 displayed lower magnetization consistent with the weak ferromagnetic behavior of α-Fe2O3. The combination of structural and magnetic analyses demonstrated the critical role of precursor selection in tuning the material properties for potential applications in catalysis and magnetic devices. info:eu-repo/grantAgreement/EC/H2020/101007629 /EU/Nanomaterials for Enzymatic Control of Oxidative Stress Toxicity and Free Radical Generation/NESTOR This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 101007629 -NESTOR info:eu-repo/semantics/closedAccess All rights reserved http://www.europeana.eu/rights/rr-f/ info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Fornasin, Emiliano G. Oliva, Marcos I. Goya, Gerardo F. Universidad de Zaragoza (orcid)0000-0003-1558-9279 Marchetti, Gustavo Eimer, Griselda A. Elías, Verónica R. 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 629 (2025), 173288 J. magn. magn. mater. Journal of Magnetism and Magnetic Materials 0304-8853 5406849 http://zaguan.unizar.es/record/161841/files/texto_completo.pdf Versión publicada info:eu-repo/date/embargoEnd/2026-06-03 2511483 http://zaguan.unizar.es/record/161841/files/texto_completo.jpg?subformat=icon icon Versión publicada info:eu-repo/date/embargoEnd/2026-06-03 oai:zaguan.unizar.es:161841 articulos driver 2025-10-17-14:12:46 ARTICLE