Synthesis of Dy2O3 nanoparticles via hydroxide precipitation: effect of calcination temperature
来源期刊：JOURNAL OF RARE EARTHS2014年第3期
论文作者：Bahaa M.Abu-Zied Abdullah M.Asiri
文章页码：259 - 264
摘 要：This work described the preparation of dysprosium oxide, Dy2O3, nanoparticles using the homogeneous precipitation method. Dy3+ ions were precipitated using NaOH solution. The obtained product was filtered, dried, and then calcined for 1 h at the temperature range of 300–700 °C in static air. The calcination temperature of the Dy-precursor was chosen based on its decomposition as indicated by the TGA analysis. The crystalline structure and surface morphology of the calcined solids were studied by X-ray diffraction（XRD）, field emission scanning electron microscopy（FE-SEM）, transmission electron microscopy（TEM） and X-ray photoelectron spectroscopy（XPS）. The obtained results revealed that Dy2O3 with crystallites size of 11–21 nm was formed at 500 °C. Such value increased to 25–37 nm for the sample calcined at 700 °C.
Bahaa M.Abu-Zied1,2,3，Abdullah M.Asiri1,2
1. Chemistry Department, Faculty of Science, King Abdulaziz University2. Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University3. Chemistry Department, Faculty of Science, Assiut University
摘 要：This work described the preparation of dysprosium oxide, Dy2O3, nanoparticles using the homogeneous precipitation method. Dy3+ ions were precipitated using NaOH solution. The obtained product was filtered, dried, and then calcined for 1 h at the temperature range of 300–700 °C in static air. The calcination temperature of the Dy-precursor was chosen based on its decomposition as indicated by the TGA analysis. The crystalline structure and surface morphology of the calcined solids were studied by X-ray diffraction（XRD）, field emission scanning electron microscopy（FE-SEM）, transmission electron microscopy（TEM） and X-ray photoelectron spectroscopy（XPS）. The obtained results revealed that Dy2O3 with crystallites size of 11–21 nm was formed at 500 °C. Such value increased to 25–37 nm for the sample calcined at 700 °C.
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