...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Combustion synthesis of CaSc_2O_4:Ce~(3+) nano-phosphors in a closed system
【24h】

Combustion synthesis of CaSc_2O_4:Ce~(3+) nano-phosphors in a closed system

机译：封闭系统中CaSc_2O_4：Ce〜（3+）纳米磷的燃烧合成

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The CaSc_2O_4:Ce~(3+) nano-phosphors were successfully prepared by a single-step combustion method at an ignition temperature as low as 200 °C in a closed autoclave using glycine as a fuel and PEG4000 as a dispersant. The samples were characterized by X-ray diffraction (XRD), photoluminescence (PL) spectroscopy, scanning electron microscopy (SEM) and transmission electron microscope (TEM). The results revealed that CaSc_2O_4:Ce~(3+) nano-phosphors can be conveniently prepared at an ignition temperature as low as 200 °C, which was much lower than that in the ordinary combustion methods. The optimized ignition temperature was 220°C The CaSc_2O_4:Ce~(3+) nano-phosphors give a uniform particle size in the range of 15-20 nm. The low ignition temperature and the addition of PEG4000 dispersant play important roles in the formation of small sized nanoparticles. The as-prepared nano-phosphors were incompact aggregates, but highly dispersed nano-phosphors can be obtained after further ultrasonic treatment. The CaSc_2O_4:Ce~(3+) nano-phosphors give satisfactory luminescence characteristic benefiting from the closed circumstance, in which cerium atoms can be isolated from the oxidizing atmosphere and non-fluorescent Ce~(4+) ions can be ruled out. The present highly dispersed CaSc_2O_4:Ce~(3+) nano-phosphors with efficient fluorescence are promising in the field of biological labeling, and the present low temperature combustion method is facile and convenient and can be applied as a universal process for preparing non-aggregate oxide nano-phosphors, especially those being sensitive to air at high temperature.
机译：CaSc_2O_4：Ce〜（3+）纳米荧光粉是在甘氨酸为燃料，PEG4000为分散剂的密闭高压釜中，通过一步燃烧法在低至200°C的点火温度下成功制备的。通过X射线衍射（XRD），光致发光（PL）光谱，扫描电子显微镜（SEM）和透射电子显微镜（TEM）对样品进行表征。结果表明，CaSc_2O_4：Ce〜（3+）纳米荧光粉可以在低至200°C的着火温度下方便地制备，远低于常规燃烧方法。优化的点火温度为220°C。CaSc_2O_4：Ce〜（3+）纳米磷光体的粒径均匀，在15-20 nm之间。低着火温度和添加PEG4000分散剂在小尺寸纳米颗粒的形成中起重要作用。所制备的纳米磷光体是紧密的聚集体，但是在进一步的超声处理之后可以获得高度分散的纳米磷光体。受益于封闭环境，CaSc_2O_4：Ce〜（3+）纳米磷光体具有令人满意的发光特性，其中铈原子可以从氧化气氛中分离出来，并且可以排除无荧光的Ce〜（4+）离子。目前具有高效荧光的高度分散的CaSc_2O_4：Ce〜（3+）纳米磷光体在生物标记领域很有前途，并且目前的低温燃烧方法简便易行，可作为制备非磷酸钙的通用方法。会聚集氧化物纳米荧光粉，尤其是对高温对空气敏感的氧化物。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号