...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>New Journal of Chemistry >Template synthesis of the hierarchically structured MFI zeolite with nanosheet frameworks and tailored structure
【24h】

Template synthesis of the hierarchically structured MFI zeolite with nanosheet frameworks and tailored structure

机译：具有纳米片框架和定制结构的分层结构MFI沸石的模板合成

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

The hierarchical zeolite with MFI nanosheet frameworks was directly prepared under hydrothermal synthesis conditions using a series of tetra-headgroup rigid bolaform quaternary ammonium surfactants, where the bolaform surfactants act as dual structure-directing functions on two different length scales (micro- and mesoporous) simultaneously. The MFI zeolite nanosheets were characterized by a complementary combination of X-ray diffraction, scanning electron microscopy, transmission electron microscopy, nitrogen adsorption isotherms, Fourier transform infrared spectroscopy, ~(27)Al MAS NMR spectroscopy, thermogravimetric analysis and density functional theory calculations. The results suggested that the hydrophilic headgroups caused the atuminosilicate species to form MFI zeolite-like frameworks while the surfactant linkers with a rigid biphenol group directed MFI nanosheet layers into an ordered multilamellar mesostructure. The morphologies and textural properties of MFI zeolite nanosheets could be controlled with different surfactants. Since the synthesis of MFI zeolite nanosheets has great potential for industrial applications, our synthesis approach can be expected to be extended to other types of zeolites in order to improve their performance in targeted catalytic reactions.
机译：具有MFI纳米片状骨架的分级沸石是在水热合成条件下直接使用一系列四头基团刚性硼酸盐形式的季铵表面活性剂制备的，其中硼酸盐表面活性剂同时在两种不同的长度尺度（微孔和中孔）上充当双重结构导向功能。 MFI沸石纳米片的特征是X射线衍射，扫描电子显微镜，透射电子显微镜，氮吸附等温线，傅立叶变换红外光谱，〜（27）Al MAS NMR光谱，热重分析和密度泛函理论计算的互补组合。结果表明，亲水性头基会导致硅烷基硅藻土物种形成MFI沸石状骨架，而具有刚性双酚基团的表面活性剂接头则将MFI纳米片层定向为有序的多层介观结构。可以用不同的表面活性剂控制MFI沸石纳米片的形貌和结构性能。由于MFI沸石纳米片的合成在工业应用中具有巨大潜力，我们的合成方法有望扩展到其他类型的沸石，以提高其在目标催化反应中的性能。

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