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Magnetic Hyperthermia and Photocatalytic Properties of MnFe 2 O 4 Nanoparticles Synthesized by Solvothermal Reflux Method
Journal of Superconductivity and Novel Magnetism ( IF 1.8 ) Pub Date : 2020-10-01 , DOI: 10.1007/s10948-020-05685-x
A. Manohar , C. Krishnamoorthi , C. Pavithra , Narayana Thota

Development of new superparamagnetic materials with narrow size distribution is crucial for biomedical and environmental applications. Hence, we report the synthesis of narrow size distributed single grain MnFe2O4 nanoparticles of average particle size 9 nm by solvothermal reflux method. Synthesized compound crystallized in face centered cubic spinel structure and is confirmed by X-ray diffraction profiles. Transmission electron micrograph shows narrow size distributed particles with an average particle size of 9 nm and is equal to crystallite diameter estimated from Scherrer equation. The spinel crystal structure is further confirmed by electron diffraction profiles, Fourier transformed infrared spectrum, and Raman spectrum at room temperature. Magnetic properties of the sample show superparamagnetic nature at room temperature with moderate saturated magnetization of 56.4 emug−1. Magnetic heating properties of nanoparticles dispersion show the attainment of hyperthermia temperature (43 °C) in a short span of time of 1.6 min for 2 mg/mL and 2.6 min for 1 mg/mL concentrations. Estimated specific heat generation rate or specific power absorption rate, from temporal temperature plots, is 145.78 Wg−1 and is useful for magnetic hyperthermia application in cancer therapy. Photocatalysis properties of sample show 96% of rhodamine B dye degradation in little less than 6 h under UV light irradiation and are useful for photocatalytic applications in wastewater treatment in industries.



中文翻译:

溶剂热回流法合成MnFe 2 O 4纳米粒子的磁热学和光催化性能

具有窄尺寸分布的新型超顺磁性材料的开发对于生物医学和环境应用至关重要。因此,我们报告了窄尺寸分布的单晶MnFe 2 O 4的合成溶剂热回流法制备平均粒径为9 nm的纳米颗粒。合成的化合物以面心立方尖晶石结构结晶,并通过X射线衍射图证实。透射电子显微照片显示窄粒径分布的颗粒,平均粒径为9 nm,并且等于根据Scherrer方程估算的微晶直径。尖晶石晶体结构在室温下进一步通过电子衍射图,傅立叶变换红外光谱和拉曼光谱得到证实。样品的磁性能在室温下显示超顺磁性,中度饱和磁化强度为56.4 emug -1。纳米粒子分散体的电磁加热特性表明,在2 mg / mL浓度的1.6分钟和1 mg / mL浓度的2.6分钟的短时间内即可达到高温(43°C)。根据时间温度图估计的比热产生率或比功率吸收率是145.78 Wg -1,可用于癌症治疗中的磁热疗。样品的光催化性能表明,在紫外线照射下不到6小时,罗丹明B染料的降解率为96%,可用于工业废水的光催化应用。

更新日期:2020-10-02
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