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Role of SDS surfactant concentrations on the structural, morphological, dielectric and magnetic properties of CoFe2O4 nanoparticles

机译:SDS表面活性剂浓度对CoFe2O4纳米颗粒的结构,形态,介电和磁性的影响

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In this work, we report on the preparation of sodium dodecyl sulfate (SDS) surfactant added co balt ferrite (CoFe2O4) magnetic nanoparticles by a co-precipitation method at various concentrations (0.04, 0.08, 0.12, 0.16 and 0.20 M) of SDS. The formation of a single phase cubic spinel structure is confirmed by XRD analysis. FTIR study confirms the presence of Fe-O symmetrical stretching vibrations in the tetrahedral site. TEM images imply that the SDS surfactant significantly limits the agglomeration of CoFe2O4 nanoparticles. A dielectric study reveals that the SDS added CoFe2O4 has a higher dielectric constant than that of pure CoFe2O4 nanoparticles. Magnetic measurements showed the enhanced saturation magnetization (138.75 emu g(-1)), coercivity (775.69 Oe) and retentivity (60.23 emu g(-1)) for 0.08 M SDS added CoFe2O4 nanoparticles. Further, the results obtained in the present study suggest that the surfactant can significantly modify the size and morphology of the prepared CoFe2O4 nanoparticles.
机译:在这项工作中,我们报告了通过共沉淀法以各种浓度(0.04、0.08、0.12、0.16和0.20 M)的SDS制备添加了钴铁氧体(CoFe2O4)磁性纳米粒子的十二烷基硫酸钠(SDS)表面​​活性剂的制备方法。通过XRD分析证实了单相立方尖晶石结构的形成。 FTIR研究证实在四面体部位存在Fe-O对称拉伸振动。 TEM图像表明,SDS表面活性剂显着限制了CoFe2O4纳米颗粒的团聚。介电研究表明,添加SDS的CoFe2O4具有比纯CoFe2O4纳米粒子更高的介电常数。磁性测量表明,对于添加了0.08 M SDS的CoFe2O4纳米颗粒,饱和磁化强度(138.75 emu g(-1)),矫顽力(775.69 Oe)和保持力(60.23 emu g(-1))有所增强。此外,在本研究中获得的结果表明,表面活性剂可以显着改变所制备的CoFe 2 O 4纳米颗粒的尺寸和形态。

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