Preparation of Nano Y2O2S:Eu Phosphor by Ethanol Assisted Combustion Synthesis Method

Y2O2S:Eu nano crystallines were prepared by a new ethanol assisted combustion synthesis method using sulfurcontained organic fuel in an ethanol-aqueous solution. The as-prepared nanocrystallines were characterized by X-ray diffraction, transmission electron microscope, photoluminescence spectra and X-ray luminescence spectra. It is shown that the assistant fuel ethanol has the effect of decreasing the water needed, simplifying the experiment procedure by dissolving rare earth nitrate and sulfur-contained organic fuel into an even solution, and prompting the formation of rare earth oxysulfide by igniting firstly during heating that leads to combustion decomposition reaction. Y2O2S: Eu nano crystallines with strong photoluminescence and X-ray luminescence are obtained using thioacetamide as organic fuel. Mixtures of Y2O3: Eu and Y2O2S: Eu are acquired using thiourea as fuel, and the content of Y2O2S:Eu increases until reaches to about half of the Y2O3: Eu with the increasing amount of thiourea. Y2O2SO4: Eu emerges when S/Y = 6 and increases with increasing thiourea amount.