...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Crystal growth & design >Nucleation and Growth of Cobalt Oxide Nanoparticles in a Continuous Hydrothermal Reactor under Laminar and Turbulent Flow
【24h】

Nucleation and Growth of Cobalt Oxide Nanoparticles in a Continuous Hydrothermal Reactor under Laminar and Turbulent Flow

机译：层流和湍流作用下连续水热反应器中氧化钴纳米粒子的形核和生长

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

Cobalt oxide (Co3O4) nanoparticles were synthesized from aqueous solutions of cobalt(II) acetate using a laboratory scale continuous hydrothermal flow synthesis reactor incorporating a confined jet (coaxial) mixer. By changing the concentration of the precursor combined with operating under flow rate conditions expected to result in a laminar or turbulent mixing, the size of the crystallites could be controlled in the range of 6.5-16.5 nm (median). A quench stream was employed to rapidly cool down the nascent stream of nanoparticles and to elucidate the mechanisms of nucleation and growth. The results show a clear correlation between increasing precursor concentration and crystallite size, which at lower concentrations in particular, decreased in laminar flow and increased in turbulent flow. The smallest particles of 6.5 nm (median) were produced at a precursor concentration of 0.1 M (at a rate of 20 g.h(-1)). The materials were characterized using a range of analytical methods including powder X-ray diffraction and transmission electron microscopy.
机译：使用实验室规模的连续水热流合成反应器，并结合密闭射流（同轴）混合器，从乙酸钴（II）的水溶液中合成氧化钴（Co3O4）纳米粒子。通过改变前体的浓度并在预期导致层流或湍流混合的流速条件下进行操作，可以将微晶的尺寸控制在6.5-16.5nm（中值）的范围内。使用骤冷流来快速冷却新生的纳米颗粒流，并阐明成核和生长的机制。结果显示增加的前驱物浓度和微晶尺寸之间存在明显的相关性，尤其是在较低的浓度下，层流减少，湍流增加。在前体浓度为0.1 M（速率为20 g.h（-1））下，产生了6.5 nm（中值）的最小颗粒。使用一系列分析方法（包括粉末X射线衍射和透射电子显微镜）对材料进行了表征。

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