超顺磁性
傅里叶变换红外光谱
水溶液
Zeta电位
铁磁性
微晶
纳米颗粒
材料科学
分析化学(期刊)
磁性纳米粒子
化学工程
粒径
扫描电子显微镜
核化学
化学
纳米技术
磁化
结晶学
物理化学
色谱法
磁场
物理
复合材料
工程类
量子力学
作者
Abhishek Kumar,Krunal M. Gangawane
标识
DOI:10.1016/j.powtec.2022.117298
摘要
In this work, the effect of four different precipitating agents on the structural and magnetic properties of synthesized ferromagnetic nanoparticles (FMNPs) by the co-precipitation method has been explored. In particular, different precipitating agents used in work include (I) NH3, (II) NH3 with alcohol, (III) NaOH, and (IV) aqueous NH3 solution. The synthesized nanoparticles were characterized by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), scanning electron microscope (FESEM/EDS), zeta-potential, and vibrating sample magnetometer (VSM). From the XRD pattern and Debye-equation, it appears that the obtained nanoparticles were magnetite with an average crystallite size of 8–27.6 nm. The FTIR spectrum of NH3 in an alcohol solution indicates a perfect stretching of the Fe–O, O–H, C–H functional groups compared to other cases. Moreover, superparamagnetic behavior at room temperature was also noticed from VSM analysis. NH3 in an alcohol solution as a precipitating agent showed higher magnetic properties of FMNPs than the other cases. Conversely, the response time was found to be the longest for the same set. The procedure with NaOH in an aqueous solution was the cheapest with a shorter reaction time. Nevertheless, the particle surface and magnetic characteristics were lesser than the other cases of precipitating agents.
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