• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Synthesis of a hydrothermally stable, periodic mesoporous material containing magnetite nanoparticles, and the preparation of oriented films
【24h】

Synthesis of a hydrothermally stable, periodic mesoporous material containing magnetite nanoparticles, and the preparation of oriented films

机译：包含磁铁矿纳米粒子的水热稳定的周期性介孔材料的合成以及取向膜的制备

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

Magnetite nanoparticles modified covalently with triethoxysilane having a quaternary dicetyl ammonium ion are used together with tetraethylorthosilicate as building blocks to prepare a mesoporous material. Cetyltrimethylammonium bromide is used as a structure-directing agent under conditions typically used for mesoporous MCM-41 silicas. The resulting mesoporous material (MAG-MCM-41), containing up to 15 wt % of magnetite is characterized by transmission electron microscopy (TEM), isothermal gas adsorption, and X-ray diffraction. In contrast to siliceous MCM-41, mesoporous MAG-MCM-41 exhibits a remarkable hydrothermal stability. The magnetic properties of MAG-MCM-41 are characterized by DC and AC magnetic susceptibility, and by isothermal hysteresis cycles, confirming the long-range magnetic ordering above 400 K. As evidenced by atomic force microscopy and TEM, the ability to respond to magnetic fields is used to orient films of MAG-MCM-41 with the channels perpendicular to a support.
机译：将与具有季二十六烷基铵离子的三乙氧基硅烷共价改性的磁铁矿纳米颗粒与原硅酸四乙酯一起用作结构单元，以制备介孔材料。十六烷基三甲基溴化铵在通常用于中孔MCM-41二氧化硅的条件下用作结构导向剂。通过透射电子显微镜（TEM），等温气体吸附和X射线衍射对所得的包含最多15重量％磁铁矿的介孔材料（MAG-MCM-41）进行表征。与硅质MCM-41相比，介孔MAG-MCM-41具有出色的水热稳定性。 MAG-MCM-41的磁性能具有DC和AC磁化率以及等温磁滞回旋的特征，从而确认了400 K以上的长距离磁有序性。如原子力显微镜和TEM所证明的那样，磁响应能力磁场用于定向MAG-MCM-41的胶片，使其通道垂直于支撑物。

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