...
  • 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, B. Condensed matter, materials, surfaces, interfaces & biophysical >Aged Titania Nanoparticles:The Simultaneous Control of Local and Long-Range Properties
【24h】

Aged Titania Nanoparticles:The Simultaneous Control of Local and Long-Range Properties

机译：老化的二氧化钛纳米颗粒：局部和远距离特性的同时控制

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

TiO_2 nanoparticles are obtained by combining a sol-gel preparative route with hydrothermal aging steps,performed in mild conditions,of varying time lengths.Both aged and un-aged samples are thermally treated at 300 and 600degC,for the same length of time.The crystal structures,the phase composition,and crystallite sizes are analyzed by powder X-ray diffraction.Raman spectra of anatase nanocrystals with average sizes of 7-10 nm are reported and the correlation between the Raman band shape of the main feature at 144 cm~(-1) and the crystallite size is discussed.Nitrogen physisorption by Brunauer-Emmett-Teller (BET) method is adopted to evaluate the particles surface area and mesopore size and size distribution.The role played by the hydrothermal step in affecting the physicochemical properties of the powders is discussed also with respect to the H_2O/TiO_2 interactions as apparent from Raman spectroscopy investigations of the O-H stretching range (3000-3800 cm~(-1)).
机译：通过将溶胶-凝胶制备路线与水热老化步骤相结合获得TiO_2纳米粒子，该步骤在温和条件下，不同时间长度下进行。老化和未老化的样品在300和600°C下进行相同时间的热处理。通过粉末X射线衍射分析晶体结构，相组成和微晶尺寸。报道了平均尺寸为7-10 nm的锐钛矿型纳米晶体的拉曼光谱，并且在144 cm〜处主要特征的拉曼能带形状之间具有相关性（-1）和微晶尺寸的讨论从OH拉伸范围（3000-3800 cm〜（-1））的拉曼光谱研究中可以明显看出，粉末的H_2O / TiO_2相互作用也得到了讨论。

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