ISSN: 1813-0410

Keywords : TiO

Synthesis of TiO2 and Cu2O nanoparticles and TiO2/Cu2O nanocomposite and study the ability to remove pollutants from aqueous solution

Shaimaa hamed jaber

journal of kerbala university, Volume 11, Issue 3, Pages 137-146

TiO2,Cu2O nanoparticles and TiO2/Cu2O nanocomposite have been synthesized by electrochemical deposition method. The synthesized nanoparticles and nanocomposite characterized by X-ray diffraction (XRD), Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM).
Results showed that TiO2 nanoparticles have average size of (8-14)nm, Cu2O nanoparticles have average size of (11-15)nm and TiO2/Cu2O nanocomposite have average size of (13-20)nm.
The synthesized nanoparticles were applied to remove 1-nitroso-2-naphthol from aqueous solution. UV-vis spectra results indicate that the percentage of degradation with the sequence
TiO2/Cu2O= 89%< TiO2= 68% < Cu2O= 42% .

Investigation of structural, optical and electrical properties of TiO2 and ZnO thin films

Samer. Y. Al-Dabag; Ghuson. H. Mohammed; Sudad. S. Ahmed

journal of kerbala university, Volume 8, Issue 3, Pages 7-16

This paper reports the investigation of structural, optical and electrical properties of TiO2 and ZnO thin films. The thin films were prepared by pulsed laser deposition (PLD) method using pulsed Nd:YAG laser at 1064nm wavelength and repetition rate 6Hz. Different pulse of shot (200, 500, 800) and different thickness of TiO2 (150, 250, 400)nm, ZnO (250, 400, 550)nm. were used at constant energy (800 m J).
Morphology of the deposits materials were studied by Atomic Force Microscopy (AFM), results indicated that all thin films have nanoscale grain size around 90 nm.
The linear optical measurements showed that nanostructure (TiO2 and ZnO) thin films have direct energy gap.
The Hall effect measurements confirmed that the nanostructure (TiO2 and ZnO) thin films are n-type and the charge carriers concentration (n) were increased with increasing pulse shot. Hall mobility (H) decreases with the increasing of pulse shot thin films.

Dielectric behavior and Ac conductivity measurements of bulk (TiO2, ZnO/Epoxy) composites

Abdullah A. Hussein; Abdulwahab. A.Sultan; Tahseen A. Saki

journal of kerbala university, Volume 8, Issue 1, Pages 348-356

Dielectric behavior and ac conductivity measurements on epoxy resin filled with (5, 10, 15, 20, 25 wt.%.) micro sized particles of TiO2 and ZnO have been studied.. The measurements were carried out in the frequency range (120Hz - 2MHz) and over a wide temperature 30 ◦C and 110◦C. Different dielectric behavior was observed depending on filler type, filler contact, frequency and temperature.
Results show that dielectric permittivity (ε') and dielectric loss(ε") increases with the addition of epoxy resin, which has been attributed to interfacial polarization. The value of (ε') increased with increasing temperature, due to the greater freedom for movement of the dipole molecular chains within the epoxy at high temperature. The value of (ε') decreases with increasing frequency, which indicates that the major contribution to the polarization comes from orientation polarization. Interfacial relaxation is found to be strongly dependent on the presence of micro-filler particles. The Alternating Current (AC) conductivity increases as the temperature and frequency, because of the segmental mobility and electrical conduction.