...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Sensors and Actuators. B, Chemical >Preparation, characterization and gas-sensing properties of rare earth mixed oxides
【24h】

Preparation, characterization and gas-sensing properties of rare earth mixed oxides

机译：稀土混合氧化物的制备，表征和气敏性能

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

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

摘要

Nanometer materials of rare earth mixed oxides REFeO_3 (RE = Eu, Gd) with the structure of perovskite type were synthesized by sol-gel method in the citric acid system. The structure and crystal phase of the powders were characterized on an X-ray diffractometer. The shape and size were analyzed with the help of JEM-100X Transmission electron microscopy. The results show that the morphologies of the two perovskite-type oxides are spherical with the mean grain size of 20 and 21 nm, respectively. Their crystal structures show a certain amount of lattice distortion due to the decrease of grain size and the increase of surface area. Gas sensitivities of these two kinds of materials to C_2H_5OH, H_2S, gasoline and H_2 were tested. The studies of gas-sensing characteristics show the sensitivities of EuFeO_3 and GdFeO_3 nanometer materials to gasoline are 39 and 45 at 340 ℃, respectively, and both of them have appropriate selectivity. So they are promising candidates for the detection of gasoline in monitoring environment.
机译：通过溶胶-凝胶法在柠檬酸体系中合成了钙钛矿型结构的稀土混合氧化物REFeO_3（RE = Eu，Gd）纳米材料。用X射线衍射仪表征粉末的结构和晶相。借助于JEM-100X透射电子显微镜分析其形状和尺寸。结果表明，两种钙钛矿型氧化物的形态均为球形，平均粒径分别为20和21 nm。由于晶粒尺寸的减小和表面积的增加，它们的晶体结构表现出一定量的晶格畸变。测试了这两种材料对C_2H_5OH，H_2S，汽油和H_2的气体敏感性。气敏特性的研究表明，EuFeO_3和GdFeO_3纳米材料在340℃下对汽油的敏感性分别为39和45，并且两者都具有适当的选择性。因此，它们是在监测环境中检测汽油的有希望的候选人。

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