• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Dataset Papers in Science >High-Yield Synthesis of Cubic and Hexagonal Boron Nitride Nanoparticles by Laser Chemical Vapor Decomposition of Borazine
【24h】

High-Yield Synthesis of Cubic and Hexagonal Boron Nitride Nanoparticles by Laser Chemical Vapor Decomposition of Borazine

机译：硼嗪的激光化学气相分解高产率合成立方和六方氮化硼纳米粒子

获取原文
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We report a new method for the synthesis of boron nitride nanostructures (nBN) using laser chemical vapor decomposition (LCVD). Borazine was used as precursor and excited with two simultaneous radiations, the fundamental and second YAG laser harmonics. If only one of the two radiations is employed, no reaction takes place. Abundant BN powder is obtained after one hour of laser radiation. The BN yield obtained with the LCVD technique is about 83% by weight. The BN material was characterized using scanning electron microscopy, transmission electron microscopy, electron energy loss spectroscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, and X-ray diffraction. They all indicate that the BN powder consists of a mixture of hexagonal and cubic BN nanostructures. No other BN phases or stoichiometries were found. The size of the resulting BN nanostructures is in the range of 20–100 nm and their B : N composition is 1 : 1. A simplified mechanism involving laser-excited states followed by photoinduced removal of hydrogen is proposed to understand the synthesis of BN nanopowder by LCVD of borazine.
机译：我们报告了一种使用激光化学气相分解（LCVD）合成氮化硼纳米结构（nBN）的新方法。硼嗪被用作前驱体，并同时受到两个同时辐射（基波和二次YAG激光谐波）的激发。如果仅使用两种辐射之一，则不会发生反应。一小时的激光辐射后会获得大量的BN粉末。用LCVD技术获得的BN产率为约83重量％。使用扫描电子显微镜，透射电子显微镜，电子能量损失光谱，拉曼光谱，傅立叶变换红外光谱和X射线衍射来表征BN材料。它们都表明BN粉末由六方和立方BN纳米结构的混合物组成。没有发现其他BN相或化学计量。生成的BN纳米结构的尺寸在20–100 andnm范围内，其B：N组成为1：proposed1。提出了一种简化的机理，涉及激光激发态然后光诱导去除氢，以了解BN纳米粉的合成通过LCVD对硼嗪进行分析。

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