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

سال انتشار: 1388
محل انتشار: سومین کنفرانس نانوساختارها
کد COI اختصاصی: CNS03_070
زبان مقاله: انگلیسی
تعداد مشاهده: 2308

نویسندگان

Department of Physics, Shahid Chamran University, Ahvaz, Iran

چکیده

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.

کلیدواژه ها

Fe3O4 nanoparticles; Ultrasonication; Structural properties; Surfactant effect; UV-Visible spectroscopy

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