...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Crystal growth & design >Room temperature synthesis of hierarchical SrCO3 Architectures by a surfactant-free aqueous solution route
【24h】

Room temperature synthesis of hierarchical SrCO3 Architectures by a surfactant-free aqueous solution route

机译：室温合成无溶剂的水溶液路线合成SrCO3架构

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

Novel SrCO3 architectures were prepared by a facile aqueous solution route at room temperature using SrCl2, Na2CrO4, and NaOH as the starting reaction reagents and distilled water as the solvent. The synthesized products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, selected-area electron diffraction and high-resolution transmission electron microscopy. The SrCO3 architectures are in dandelion-like and flower-like morphologies with diameters of 5-10 mu m and composed of numerous well-aligned single-crystalline nanorods of 20-40 nm in diameter and 1-2 mu m in length. It is found that the morphology of the final products is strongly dependent on the experimental parameters, such as the concentration of aqueous NaOH solution and the reaction temperature. Various controlled synthetic experiments indicate that the growth process of SrCO3 architectures involves the growth of single-crystalline SrCrO4 nanowires, the formation of CO32- ions through the reaction between CO, cas from air and aqueous NaOH solution, and finally the formation of SrCO3 architectures through the reaction between SrCrO4 and CO32- ions controlled by the difference of the solubility product. In addition, a "rod to dumbbell to sphere" mechanism is proposed for the formation of the SrCO3 architectures.
机译：通过在室温下使用SrCl2，Na2CrO4和NaOH作为起始反应试剂，并用蒸馏水作为溶剂，在室温下通过简便的水溶液路线制备新型SrCO3结构。通过X射线衍射，扫描电子显微镜，透射电子显微镜，选择区域电子衍射和高分辨率透射电子显微镜对合成产物进行表征。 SrCO3结构呈蒲公英状和花状形态，直径为5-10微米，由直径20至40纳米，长度1-2微米的许多排列良好的单晶纳米棒组成。发现最终产物的形态在很大程度上取决于实验参数，例如NaOH水溶液的浓度和反应温度。各种受控的合成实验表明，SrCO3体系结构的生长过程涉及单晶SrCrO4纳米线的生长，通过空气与NaOH水溶液中的CO，cas之间的反应形成CO32-离子，最后通过SrCO3体系结构的形成。 SrCrO4与CO32离子之间的反应受溶解度乘积差异的控制。另外，提出了一种“杆到哑铃到球”的机制来形成SrCO3结构。

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