Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : gel method


Synthesis of Magnetic MWCNTs Nanohybrids and Application in Remediation of Chromium Ions in Refinery Wastewater

A. M. ALI

Engineering and Technology Journal, 2017, Volume 35, Issue 8, Pages 838-841

This study presents the preparation of Magnetic - Multiwall Carbon Nanotubes (M-MWCNTs) as adsorbents, MWCNTs/Fe3O4 nanocomposite, in which multiwall carbon nanotubes were coated to magnetic Fe3O4 particles by simplistic sol-gel techniques. The synthesized MWCNTs/Fe3O4 nano-composites were measured via Fourier Transform Infrared spectroscopy (FTIR), X -Ray Diffraction spectrometry (XRD), and Scanning -electron microscopy (SEM). The adsorption behaviors of the MWCNTs/Fe3O4 nanocomposites will be evaluated intended for the elimination of chromium ions in diluted refinery wastewater.

Synthesis Nano Zinc Oxide Materials and Their Activity on Fungus Growth

A. J. Bohan; E.D. Alhtheal; Kh. S. Shaker

Engineering and Technology Journal, 2017, Volume 35, Issue 1, Pages 76-84

In this study Zinc oxide Nano particles was synthesized by employing sol-gel technique to explore novel antifungal agents to beat the developed of fungi resistance to many conventional fungicides .Prepared of Zinc oxide Nano particles were investigated via using Scanning Electron Microscopy (SEM, the VEGA Easy Probe), X ray powder diffraction (XRD) , FTIR spectrum, The antifungal properties of ZnO nanoparticles were tested against Fussarium spp., Alternaria spp. , Penicillium spp. , and Aspergillus spp. by using agar diffusion method. The percentage of growth was lowest comparison with control for all types of fungi when used zinc oxide Nano in different concentration.

Synthesis and Characterization of TiO2 Nanoparticles via Sol-Gel Method by Pulse Laser Ablation

Adawiya J. Haider; Zainab N. Jameel; Samar Y. Taha

Engineering and Technology Journal, 2015, Volume 33, Issue 5, Pages 761-771

Nanocrystalline titania powder was prepared at room temperature via sol-gel method; using TiCl4 as precursor and absolute ethanol solution. After mixing, the gel solution was formed. Then the sol-gel dried and calcined at different temperatures. The size of the prepared nanoparticles was reduced by Nd-YAG Pulse Laser Ablation (PLA). The characterization of the TiO2 Nanoparticles in two phases was carried out by X-ray Diffraction (XRD) to investigate the phase structure. The Transmission Electron Microscope (TEM) result shows the particle size of nanoparticles after laser ablation less than 10 nm. Scanning Electron Microscopy (SEM) to obtain the surface morphological studies Results showed that anatase was the only phase in titanium oxide powders up to 500 °C, when the calcination increased in the region of 900 °C the phase transformation from anatase to rutile occurred in the TiO2 nanopowders. This paper shows a comparison between two phases of TiO2 Nanoparticles (anatase and rutile). Fourier Transform Infra-Red (FTIR) to study the vibrational frequencies between the bonds of atoms for synthesized TiO2 Nanoparticles. The Crystalline size of TiO2 Nanoparticles obtained was between (15 -70) nm for anatase at 500 °C and rutile at 900 °C. In FTIR analysis, all the peaks observed were around (400-700) cm-1 due to stretching and bending vibrations.

Structural and Electric Investigations of Al-doped nano Nickel Ferrite

Salam H. Ali Al-Hadad; Shahad Humam Sulaiman

Engineering and Technology Journal, 2015, Volume 33, Issue 3, Pages 443-452

Aluminum doped nickel ferrite samples with composition NiFe2-xAlxO4 (where; x=0, 0.2 ,0.4, 0.6, 0.8, 1, 1.2, 1.4), were synthesized by using sol-gel auto combustion method at temperature about 200°C,then pelletized and sintered at different temperatures (900, 1000, 1100 and 1200°C) . The present work focuses on studying the structural and electrical properties of Ni-Al ferrite by using many analysis’s like x-ray diffraction, LCR meter, FTIR and AFM. The results show that the chemical composition has a major effect on electrical, structural, and physical properties. The result also showed that the dielectric constant and dielectric loss decreased with the increase of the Al content in Ni-Al ferrite sintered at 12000C.