TiO 2 nanoparticles were prepared from TiCl 4 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 TiO 2 nanoparticles was obtained in the range of (3-30) nm. The synthesized TiO 2 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. TiO 2 nanoparticles are more efficient as antibacterial agents with Staphylococcus aurous as compared with E-coli.
In this work solid state dye sensitized solar cell (SSDSSC) type (ITO / TiO2/ Ru / CuI / Ag) is fabricated. The thin films are prepared by pulse laser deposition (PLD) technique under the vacuum pressure of 3×10−3 mbar and annelid at 450 oC. In this technique Nd:YAG laser at 1064 nm wavelength with (200 , 500 , 800) pulsed was used. It was noticed from (I-V) characteristics of the solar cell that the photocurrent collected from the TiO2 (NP) is increase as the number of laser pulses increase. The conversion efficiency of TiO2 is increased from 2.115% up to 5.654% and for CuI from 1.73 % to 5.19 % when the number of pulses increase from 200 up to 800.
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