کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5454579 1514356 2017 23 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structure and optical properties of Fe3O4 nanoparticles synthesized by co-precipitation method with different organic modifiers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Structure and optical properties of Fe3O4 nanoparticles synthesized by co-precipitation method with different organic modifiers
چکیده انگلیسی
Synthesis and modification of magnetite nanoparticles were carried out by co-precipitation method. The influence of different organic modifiers on structure and optical properties of Fe3O4 nanoparticles has been studied in detail. The X-ray diffraction method, transmission electron microscopy, Fourier transform infrared spectroscopy and UV-visible spectroscopy were used to determine crystallite size, structure, morphology and optical band-gap energy. The magnetite nanoparticles with different crystallite size at range of 2.9-12.2 nm were obtained by the modified controlled chemical co-precipitation method. The results showed that the Fe3O4 nanoparticles synthesized in solution containing tartaric acid were the smallest and had the highest value of optical band-gap energy (3.01 eV). The use of dextrin allowed obtaining nanocomposite, in which magnetite nanoparticles were dispersed in polysaccharide matrix. It was confirmed that with the decrease in the crystallite size the value of the optical band-gap energy increases, which is related to quantum phenomena. Additionally, shift of characteristic peaks from FeO bond in Fourier transform infrared spectra were observed, what is also associated with change of the nanoparticles size.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 131, September 2017, Pages 148-156
نویسندگان
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