...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Effects of Transition Metal Doping on the Growth and Properties of Rutile TiO2 Nanoparticles
【24h】

Effects of Transition Metal Doping on the Growth and Properties of Rutile TiO2 Nanoparticles

机译：过渡金属掺杂对金红石型TiO2纳米粒子生长和性能的影响

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

Rutile TiO2 nanoparticles doped with V, Cr, or Mn ions have been synthesized via a modified Pechini method using polymeric precursors. The final particle sizes range between 20 and 500 nm depending on the selected dopant. The TiO2 rutile phase has been stabilized in the doped nanoparticles at 650 °C. Microstructural analysis shows a good crystallinity and cationic. homogeneity of the doped nanoparticles. The cathodoluminescence study of the doped and undoped nanoparticles shows a luminescence signal related to the structural defects of the samples and the presence of dopants. In particular, an intense 1.52 eV emission associated with Ti~(3+) interstitials dominates the luminescence of undoped nanoparticles, which also exhibit less intense emissions extending from 2 to 3.4 eV. The presence of V, Cr, or Mn in the rutile TiO2 nanoparticles induces variations in the associated cathodoluminescence signal which would be useful in order to achieve a deeper understanding of the doping process and spread future optical applications. X-ray photoelectron spectroscopy (XPS) confirmed the presence of Ti~(3+) in the near-surface region of the nanoparticles, the concentration of which decreases when doping. The presence of Ti~(3+) interstitials related states in the band gap is discussed.
机译：掺杂了V，Cr或Mn离子的金红石型TiO2纳米颗粒已经通过改良的Pechini方法使用聚合物前体合成。最终粒径取决于所选的掺杂剂，范围在20到500 nm之间。 TiO2金红石相已在650°C下稳定在掺杂的纳米颗粒中。显微组织分析显示出良好的结晶度和阳离子性。掺杂纳米粒子的均质性。掺杂和未掺杂纳米粒子的阴极发光研究表明，发光信号与样品的结构缺陷和掺杂剂的存在有关。尤其是，与Ti〜（3+）间隙相关的1.52 eV的强发射占据了未掺杂纳米粒子的发光的主导地位，未掺杂的纳米粒子的发射强度也从2到3.4 eV下降。金红石型TiO2纳米颗粒中V，Cr或Mn的存在会引起相关的阴极发光信号的变化，这对于深入了解掺杂过程和扩展未来的光学应用很有用。 X射线光电子能谱（XPS）证实了纳米粒子近表面区域中存在Ti〜（3+），当掺杂时其浓度降低。讨论了带隙中Ti〜（3+）间隙相关态的存在。

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