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Article
Study of Characterization of Cupper Ferrites Thin Film Prepared by Pulse Laser

Authors: G.K. Salman --- S.S. Shaker --- A.H. Abd alsalam
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2017 Volume: 35 Issue: 1 Part (B) Scientific Pages: 57-62
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In this work, it has been used two methods to prepare ferrite thin film: festival “Auto combustion “and secondly “Pulse laser deposition” to synthesis copper ferrite as powder and thin film respectively. Different physical properties have been studied. XRD results indicated that synthesized ferrite as powder and thin film with two different energy (700-800) mJ prepared, where single cubic phase with spinel structure have. SEM photographs showed the spherical shape of particles with average size in range (88-109µm) and how these particles would create a uniform shape of film via laser with energy 800 mJ. Transmittance results showed that thin films prepared with low energy (i.e. 700 mJ) has higher transmittance as compared with that prepared via high energy. Furthermore more thin films band gap recorded increment from 3.8eV - 3.97 eV as laser energy increased from 700 mJ to 800mJ.


Article
Photocatlytic oxidation of congo red dye by using Co2O3–Cr2O3 as a Photocatalyst

Author: Alaa R. Amrin
Journal: Mesopotamia Environmental Journal بيئة وادي الرافدين ISSN: 24102598 Year: 2016 Volume: 2 Issue: 2 Pages: 66-74
Publisher: Babylon University جامعة بابل

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Abstract

Homogeneous crystalline chromium and cobalt oxides (Cr2O3- Co2O3) was prepared by co-precipitation method by mixing metals nitrate in the basic medium and the precipitate was calcinated at 700 C for 6 hrs. The crystalline structure of the synthesized products were analyzed by X-ray diffraction (XRD). The obtained XRD patterns of specimens revealed formation of a well-crystallized structure of double oxides after calcination at 700 C. The photocatalytic activity of double prepared oxides was investigated via following removal of congo red dye from the aqueous solution upon irradiation of reaction suspension under irradiation with UV light.

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