Synthesis and structural characterization of Ni2 FeAl Heusler alloy–embedded mesoporous SiO2 nanocomposite

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics Pub Date : 2026-01-01 Epub Date: 2025-12-15 DOI:10.1016/j.rinp.2025.108564

Alireza Shabanzadeh-Kouyakhi, Mardali Yousefpour, Omid Mirzaee

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Abstract

This study reports the synthesis of Ni₂FeAl Heusler alloy nanoparticles embedded in mesoporous SiO₂ to form a superparamagnetic nanocomposite for biomedical applications. Spherical Ni₂FeAl nanoparticles were prepared via co-precipitation using 1.0 g Ni(NO₃)₂·6H₂O, 1.0 g Fe(NO₃)₃·6H₂O, and 2.0 g Al(NO₃)₃·6H₂O in ethanol, followed by drying, differential thermal analysis/thermogravimetric analysis (DTA/TGA), and annealing at 600 °C under a 95 % N₂/5% H₂ atmosphere to remove volatile residues, including sodium hydroxide. The nanoparticles were incorporated into mesoporous SiO₂ through a freeze-drying process, producing an orange nanocomposite. X-ray diffraction (XRD) confirmed the L2₁ Heusler phase with crystallite sizes of 20–150 nm, while dynamic light scattering (DLS) revealed composite particle sizes of 60–300 nm. Field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray (EDX) mapping verified a core–shell structure with a uniform elemental distribution. Vibrating sample magnetometry (VSM) showed a saturation magnetization of 20 emu/g, confirming superparamagnetic behavior suitable for magnetic hyperthermia and drug delivery. This work demonstrates the first wet-chemical freeze-drying strategy for synthesizing Ni₂FeAl@SiO₂ nanocomposites, providing a scalable and biocompatible platform for advanced biomedical applications.

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Ni2 FeAl - Heusler合金包埋介孔SiO2纳米复合材料的合成及结构表征

本研究报道了将Ni2FeAl Heusler合金纳米颗粒嵌入介孔SiO2中，形成用于生物医学应用的超顺磁性纳米复合材料。以1.0 g Ni(NO3)2·6H2O、1.0 g Fe(NO3)3·6H2O和2.0 g Al(NO3)3·6H2O为原料，在乙醇中共沉淀法制备球形Ni2FeAl纳米颗粒，然后进行干燥、差热分析/热重分析（DTA/TGA）、600℃退火，在95% N2/5% H2气氛下去除挥发性残留物，包括氢氧化钠。通过冷冻干燥工艺将纳米颗粒掺入介孔SiO2中，制备出橙色纳米复合材料。x射线衍射（XRD）证实了L21 Heusler相的晶粒尺寸为20 ~ 150 nm，而动态光散射（DLS）显示复合颗粒尺寸为60 ~ 300 nm。场发射扫描电镜（FE-SEM）、透射电镜（TEM）和能量色散x射线（EDX）成像验证了其具有均匀元素分布的核壳结构。振动样品磁强计（VSM）显示饱和磁化强度为20 emu/g，证实超顺磁行为适用于磁热疗和药物递送。这项工作展示了合成Ni2FeAl@SiO2纳米复合材料的第一个湿化学冷冻干燥策略，为先进的生物医学应用提供了可扩展和生物相容性的平台。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Results in Physics MATERIALS SCIENCE, MULTIDISCIPLINARYPHYSIC-PHYSICS, MULTIDISCIPLINARY

CiteScore

8.70

自引率

9.40%

发文量

754

审稿时长

50 days

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