Abstract
In this work, an upconversion luminescence agent, Er3+:Y3Al5O12, was synthesized and its absorption and fluorescent spectra was determined. By calculation, the upconversion efficiency of the emission peak at 320 nm was estimated to be about 3.4%. And then, TiO2/Er3+:Y3Al5O12 composite was prepared by simple ultrasonic dispersion and liquids boil methods. The obtained composite was characterized by X-ray diffrac-tion. The effect of TiO2/Er3+:Y3Al5O12 composite with different Er3+:Y3Al5O12 doping amount, heat-treated temperature and heat-treated time on photodegradation of acid red B under sun light was investigated in detail. It was found that the photocatalytic activity of TiO2/Er3+:Y3Al5O12 composite was much higher than that for the similar system with only TiO2 powder. These results support the usefulness of TiO2/Er3+:Y3Al5O12 composite in the process of photodegrading dye wastewater and using the sun light.
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