Ahmad Shakeel, Ni Henmei, Al-Mubaddel Fahad S, Rizk Moustafa A, Ammar Mohamed Ben, Khan Afaq Ullah, Almarhoon Zainab M, Alanazi Abdulaziz A, Zaki Magdi E A
School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, PR China.
Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia.
Sci Rep. 2025 Jan 6;15(1):878. doi: 10.1038/s41598-025-85145-5.
In this study, we report the synthesis of iron oxide nanoparticles (FeONPs) using micro-emulsion-hydrothermal method. By adjusting the synthesis temperature, we successfully produced FeO nanorods and nanospheres. In addition, the 2-octanol, and the surfactant cetyltrimethylammonium bromide served as a solvent in the synthesis process. Using iron nitrate hexahydrate as the salt precursor allowed for the formation of FeONPs with varied sizes, shapes and phases. The synthesized materials were extensively characterized using XRD, SEM, TEM, EDS, FTIR, and XPS techniques. However, the structural analysis revealed rhombohedral (hematite), and (magnetite) crystal structures in the materials synthesized at different temperature and durations, with particles ranged in size from 12 to 97 nm. More importantly, the magnetic characterization, performed with a vibrating sample magnetometer and SQUID magnetometer, indicated that the NPs showed not clear superparamagnetic behavior. In conclusion, this work demonstrates the synthesis of FeONPs with controlled size, shape and phase using microemulsion hydrothermal technique, with detailed characterization offering valuable insights into their magnetic and structural properties.
在本研究中，我们报道了采用微乳液 - 水热法合成氧化铁纳米颗粒（FeONPs）。通过调节合成温度，我们成功制备出了FeO纳米棒和纳米球。此外，2 - 辛醇和表面活性剂十六烷基三甲基溴化铵在合成过程中充当溶剂。使用六水合硝酸铁作为盐前驱体可形成尺寸、形状和相不同的FeONPs。采用XRD、SEM、TEM、EDS、FTIR和XPS技术对合成材料进行了广泛表征。然而，结构分析表明，在不同温度和时长下合成的材料中存在菱面体（赤铁矿）和（磁铁矿）晶体结构，颗粒尺寸范围为12至97纳米。更重要的是，使用振动样品磁强计和超导量子干涉仪磁强计进行的磁性表征表明，这些纳米颗粒未表现出明显的超顺磁行为。总之，这项工作展示了利用微乳液水热技术合成尺寸、形状和相可控的FeONPs，并通过详细表征为其磁性和结构性质提供了有价值的见解。
