Document Type : Research Article


Department of Physics, Faculty of Science, King Abdulaziz University, Jamiaah Street, Jeddah, 21589 Bx 80200, KSA.


We have to study the factors affecting the synthesis of Co doping ZnO Nano powder with the sol – gel method to study the effect of quantity or doping concentration   we fix the reaction base at pH = 9  and change the doping concentration the  structural  and morphology carried out with X-ray and SEM show hexagonal wurtzite nanoparticles for Zn 1-x  Co x O for x = 0.01 and x = 0.05  and increase of the cell volume and lattice parameter with increase of x concentration  ,the florescence spectroscopy at room temperature show peaks at ultraviolet for both concentration with read shift for x = 0.05. To study the effect of pH value we fix doping concentration at x = 0.05, SEM shows a spherical nanoparticle with size 38 – 52 nm for pH = 9 and hexagonal nanoparticles with size 42 – 52 nm for pH = 6. The florescence spectroscopy at room temperature exhibit that for pH = 9 there is no band observed in the ultraviolet region bands are around 380,420 and 475 nm. The Ultraviolet/Visible (UV) Spectroscopy exhibit decrease of the band gap energy with increase doping concentration and decrease with increase pH value. Copyright © VBRI Press.


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