Synthesis of Lu2Ti2O7 nano-rods from molten salt with two-step calcinations
Synthesis of Lu2Ti2O7 nano-rods from molten salt with two-step calcinations
复制标题
DOI：
10.1016/j.matlet.2012.04.021
复制
发表时间：
2012-07
影响因子：
3
通讯作者：
Bao-rang Li;Hui-bin Chang;Huiying Gao;S. Hou
中科院分区：
文献类型：
--
作者：
Bao-rang Li;Hui-bin Chang;Huiying Gao;S. Hou
以TiO2和Lu2O3为前驱体，采用改进的熔盐技术，将前驱体首先加热至1000℃，然后保持在800℃进行等温处理，制备Lu2Ti2O7纳米棒。通过这种途径可以很容易地制备出直径为 50 至 500 nm、长度可达几微米、仅含有少量杂质的隔离良好的立方烧绿石 Lu2Ti2O7 纳米棒。通过 XRD、SEM、TEM、EDS、RAMAN 和 HRTEM 技术进一步表征了纳米棒的晶体结构和形貌。结果表明，Lu2Ti2O7纳米棒为单晶，所得纳米棒的生长方向为<111>晶向。
A modified molten salt technique, in which the precursors were first heated up to 1000°C and then followed by holding at 800°C for isothermal treatment, was used to prepare Lu2Ti2O7nano-rods while TiO2and Lu2O3were chosen as precursors. Well-isolated cubic pyrochlore Lu2Ti2O7nano-rods with diameters ranging from 50 to 500nm and length up to several microns, containing only minor amounts of impurities, can be easily fabricated by this route. The crystal structure and morphologies of the nano-rods were further characterized by XRD, SEM, TEM, EDS, RAMAN and HRTEM technique. The results indicated that Lu2Ti2O7nano-rod is single crystalline and the growth direction of the obtained nano-rods is determined to be the <111> crystallography direction.