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Article
Effect of Zn Substation on Structural and Magnetic Properties of Cu-Ferrites Nanoparticles

Author: Ghaed. k. Salman
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 6 Part (B) Scientific Pages: 882-893
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In this research prepared samples of CuZn-ferrites were substation of copper ions by zinc ions as a composition formula Cu1-x ZnxFe2O4 ferrite (with x = 0.0, 0.1, 0.2, 0.3) and studying the properties of composition using FTIR spectroscopy established creation of spinel ferrite and presented the features of absorption bands around 561.29-405 cm−1. X-ray diffraction (XRD) exposed that the structure of these nano particles is spinel and crystallite size lies in the range (12.22–23.9) nm. observed when added zinc ions, found increase in particle size and lattice constant while decrease in Xrd-density, and also have been identified the behavior of material Ferrite in low frequencies permeability magnetic used LCR meter , found when increasing the frequency (1-200) KHz decries in magnetic permeability (μ′) this usual behavior in ferrites and observed a significant increase in magnetic permeability when increasing zinc ions due to the effect of zinc on the internal structure of copper ferrite. At Low frequency institute that the permeability raises with Zn contented rise from (0 - 0.3) in Cu-ferrites.


Article
Fabrication of Carbon Nanotube/Titanium Dioxide Nanocomposite Photocatalyst Using Sol-Gel Method

Authors: Duha S. Ahmed --- Ali L. Abed --- Ghaed K. Salman
Journal: Iraqi Journal of Applied Physics المجلة العراقية للفيزياء التطبيقية ISSN: 18132065 23091673 Year: 2016 Volume: 12 Issue: 2 Pages: 21-24
Publisher: iraqi society for alternative and renewable energy sources and techniques الجمعية العراقية لمصادر وتقنيات الطاقة البديلة والمستجدة

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Abstract

In this work, functionalized multi-walls carbon nanotubes (FMWCNTs) were prepared and mixed with titanium dioxide nanoparticles by sol-gel chemical method using titanium tetrachloride (TiCl4) as a source. A cretin amount of MWCNTs were soaked in a mixture of 0.2ml TiCl4 and 0.1ml HCl forming MWNTs/TiO2 nanocomposite as efficient photocatalytic material. Characterization and measurements on the prepared samples before and after adding TiO2 include x-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The results reveal deposition TiO2NPs on FMWCNTs surface after leaving soaking in mixture of TiCl4 for 24h and that caused to fill the MWCNTs with TiO2 NPs and decorating surface of MWCNTs resulting in formation MWNTs/TiO2 nanocomposites.

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