TY  - BOOK
AU  - Doaa Hanafi Mahmoud 
AU  - Mohamed Abdelgawad Zayed , 
AU  - Mohamed Ali Ahmed , 
AU  - Neama Gomaa Imam , 
TI  - Preparation and characterization of hematite / magnetite nanocomposites / 
PY  - 2016///
CY  - Cairo : 
PB  - Doaa Hanafi Mahmoud  , 
KW  - Hematite
KW  - Magnetite
KW  - Nanocomposites
N1  - Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Analytical Chemistry; Issued also as CD
N2  - Herein, novel ferrofluid nanocomposites xFe₂O₃ {u200E}/ (1-x) Fe₂O₄ with different  ratios (0.0 {u2264} x{u2264} 1.0) from magnetite and hematite nanoparticles (NPs); were prepared  via sonochemical method, for the first time, for hyperthermia purposes. To confirm  the correctness of these ratios chemical analyses of ferrous and ferric contents of the  prepared nano composites were spectrophotometrically determined with and without  indicators in the wavelength range 200-800 nm. Various analytical techniques have  been used to analyze and characterize the crystalline structures of the prepared  ferrofluid nanocomposites. X-ray diffraction (XRD) confirms the formation of two  separate phases of nanocomposite components with average crystallite size ranges  from 12-30 nm. The crystallite size was tuned via the hematite weight fraction x (wt  %). FT-IR confirms the chemical composition of the two magnetic phases of the  ferrofluid nanocomposites. The IR band at 627 cm⁻¹ is attributed to the Fe{u2013}O stretching vibrations and the band at 535cm⁻¹ is due to Fe{u2013}O in Fe₂O₃. High  resolution transmission electron microscopy (HRTEM) and field emission scanning  electron microscopy (FESEM) show the spherical and rod-like shape of magnetite  and hematite respectively with average particle size of 12 nm for Fe₃O₄ NPs and 11  nm for Fe₂O₃ NPs. X-ray fluorescence (XRF) confirms that the nominal and chemical compositions are closed to each other. {u200E}
UR  - http://172.23.153.220/th.pdf
ER  -