Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : TiO

Synthesis, Antibacterial Activity of Tio2 Nanoparticles Suspension Induced by Laser Ablation in Liquid

khawlah S. Khashan; Ghassan M. Sulaima; Farah A. Abdul Ameer; Thorria R. Marzoog

Engineering and Technology Journal, 2014, Volume 32, Issue 5, Pages 877-884

Colloidal solutions of Titanium dioxide nanoparticles were synthesized by laser ablation of Titanium plate in deionized water. Studies of synthesized nanoparticles suspensions were characterized by UV-VIS absorption, Fourier transform infrared spectroscopy (FTIR) and transmission electron microscope (TEM). FTIR characterization confirms the formation of Titanium dioxide nanoparticles. TEM shows that the nanoparticles with sizes from (3 - 30) nm. The antimicrobial activity was carried out against Staphylococcus aureus and Escherichia coli. The Titanium dioxide nanoparticles showed inhibitory activity in bacteria.

Preparation and Characterization of (Tio2-Sno2) Thin Films by Pulsed Laser Deposition

Saja H.Rashed; Adawiya J. Haider; Samar Younis

Engineering and Technology Journal, 2014, Volume 32, Issue 4, Pages 658-665

In this work, mixed oxide (TiO2-SnO2) thin films were grown on Si (111) and glass substrates by pulsed laser deposition (PLD) method. The influences of increasing amounts of SnO2 were investigated. The X-ray diffraction results show the peaks position of the plane was shifted towards higher angle values with increasing amounts of SnO2. The surface morphology of the deposits materials was also studied by using a scanning electron microscope(SEM) The results show that, the grain sizes decreases with increasing SnO2 content from the largest value (53.6)nm to smallest value (25.5) nm. From UV-visible spectroscopy, the distinct variations in the transmission spectra, and optical energy gap, of the thin films were also observed.

Synthesis of TiO2 Nan particles by Using Sol-Gel Method and Its Applications as Antibacterial Agents

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

Engineering and Technology Journal, 2014, Volume 32, Issue 3, Pages 418-426

TiO2 nanoparticles were prepared from TiCl4 as a precursor with ethanol solution with 1:10 ratio in ambient atmosphere, without additive. Sol-gel synthesized has been dried and calcined at (550-600)C. The structure, morphology and the particle size of the nanoparticles were investigated by X-ray Diffraction and Scanning Electron Microscopy (SEM). The optical properties were studied by UV-Visible Spectrophotometer. Results showed that the anatase phase was only in titanium dioxide powder up to 500. The average grain size of TiO2 nanoparticles was obtained in the range of (3- 30) nm. The synthesized TiO2 nanoparticles in 10-5 and 10-3 concentrations exhibited superior antibacterial activity with two types of bacteria, Escherichia coli (E-coli) and Staphylococcus aurous respectively. TiO2 nanoparticles are more efficient as antibacterial agents with Staphylococcus aurous as compared with E-coli.

Improvement of Locally Produced Low- Density Polyethylene

Najat .J.saleh; Zanaib.Y.shnean

Engineering and Technology Journal, 2008, Volume 26, Issue 9, Pages 1061-1067

In the present work, a polymer composite was fabricated by mixing LDPE
with different wt% of pigment (Fe2O3 and TiO2) to obtain desirable properties in
fabrication single screw-extruder was utilized , this mixing machine operated at a
temperature between (150-170)Co.some of mechanical properties, such as tensile,
impact, hardness and bending test were determined at different weight fraction of
composite materials. It was found that the addition of pigment (TiO2 and Fe2O3) to the
LDPE leads to increase the modulus of elasticity, tensile strength, tensile strength at
break, shore hardness on other hand it decreases the % elongation at break, and for the
impact strength.