Effect of Surfactant Concentration on Size and Morphology of Electrooxidated Fe3O4 Nanoparticles

سال انتشار: 1388
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 2,216

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شناسه ملی سند علمی:

CNS03_070

تاریخ نمایه سازی: 21 دی 1388

چکیده مقاله:

Electrostatic surfaced Fe3O4 nanoparticles without agglomeration were successfully synthesized using electrooxidation of iron by chronoamperometry technique in the presence of tetramethylammoniumchlorid surfactant from an organic medium. The effect of surfactant concentrations and ultrasonic waves on structural properties of the particles was spontaneously studied using XRD, FT-IR, TEM and UV-Visible. XRD results, clearly approved the formation of spinel phase of Fe3O4 and no other iron oxide phase. Based on FT-IR spectrometer results, it is suggested that the surfaces of the Fe3O4 nanoparticles were covered with amine surfactant through electrostatic interaction. Through, TEM images the particles size and their distributions were found to be well controllable with surfactant concentration and ultrasonic waves. According to these images, the increase in surfactant concentration led to the reduction of the particles size and also led to particles shape from cubic, tetragonal, hexagonal and triangular to quasispherical. Additionally, TEM images show that Fe3O4 nanoparticles grow in a solution with higher surfactant concentration and also under ultrasonic waves are narrowly distributed. Namely, the use of ultrasonication with higher surfactant concentration led to the formation of fine particles. Electron diffraction patterns of the particles consist of many spots and rings, indicating their polycrystalline structures. UV-Visible spectroscopy results show the peak width of UV-Visible spectrum for sonoelectrooxidated nanoparticles was less than those prepared without ultrasonication indicating size uniformity of the particles.

نویسندگان

I Kazeminezhad

Department of Physics, Shahid Chamran University, Ahvaz, Iran

S Mosivand

Department of Physics, Shahid Chamran University, Ahvaz, Iran