Institute of Nano Science and Nano Technology, Department of Inorganic Chemistry, University of Kashan, Kashan, P.O. Box 87317-51167, Islamic Republic of Iran.
Ultrason Sonochem. 2010 Jun;17(5):870-7. doi: 10.1016/j.ultsonch.2010.02.013. Epub 2010 Mar 1.
Dysprosium carbonates nanoparticles were synthesized by the reaction of dysprosium acetate and NaHCO(3) by a sonochemical method. Dysprosium oxide nanoparticles with average size about 17 nm were prepared from calcination of Dy(2)(CO(3))(3).1.7H(2)O nanoparticles. Dy(OH)(3) nanotubes were synthesized by sonication of Dy(OAC)(3).6H(2)O and N(2)H(4). The as-synthesized nanostructures were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR). Photoluminescence measurement shows that the nanoparticles have two emission peaks around 17,540 cm(-1) and 20,700 cm(-1), which should come from the electron transition from (4)F(9)(/)(2)-->(6)H(15)(/)(2) levels and (4)F(9)(/)(2)-->(6)H(13)(/)(2) levels, respectively. The effect of calcination temperature and sonication time was investigated on the morphology and particle size of the products. The sizes could be controlled by the feeding rate of the precipitating agent (NaHCO(3) and N(2)H(4)) and slower feeding rate lead to smaller nanoparticles.
通过醋酸镝和碳酸氢钠的反应，采用超声化学法合成了碳酸镝纳米粒子。将 Dy(2)(CO(3))(3).1.7H(2)O 纳米粒子煅烧，得到平均粒径约为 17nm 的氧化镝纳米粒子。通过超声处理 Dy(OAC)(3).6H(2)O 和 N(2)H(4)，合成了 Dy(OH)(3)纳米管。通过扫描电子显微镜 (SEM)、X 射线粉末衍射 (XRD)、透射电子显微镜 (TEM) 和傅里叶变换红外光谱 (FT-IR) 对合成的纳米结构进行了表征。光致发光测量表明，纳米粒子在 17540cm(-1)和 20700cm(-1)附近有两个发射峰，这应该分别来自电子从 (4)F(9)(/)(2)-->(6)H(15)(/)(2)能级和 (4)F(9)(/)(2)-->(6)H(13)(/)(2)能级的跃迁。考察了煅烧温度和超声时间对产物形貌和粒径的影响。通过沉淀剂（碳酸氢钠和 N(2)H(4)）的进料速率以及较慢的进料速率可以控制粒径，从而得到更小的纳米粒子。
