| HoCoO_3纳米材料的结构改性与气敏性能 |
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| 引用本文： | 邓德华,杜卫民,朱兆强,魏娟,郭金福.HoCoO_3纳米材料的结构改性与气敏性能[J].电子元件与材料,2012,31(1):24-28. |
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| 作者姓名： | 邓德华 杜卫民 朱兆强 魏娟 郭金福 |
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| 作者单位： | 安阳师范学院化学化工学院,河南安阳,455002 |
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| 基金项目： | 河南省教育厅科技攻关项目，河南省高等学校青年骨干教师资助项目 |
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| 摘 要： | 利用溶胶–凝胶法成功合成了Cu2+掺杂改性的HoCoO3纳米材料。经X射线粉末衍射(XRD)仪和扫描电镜(SEM)表征后发现,所得HoCoO3纳米材料具有纯相的钙钛矿结构,其晶粒粒径为50~130 nm。将改性及未改性HoCoO3纳米材料分别制成气敏元件,并对其电性能和气敏性能进行对比研究,结果发现Cu2+掺杂可以明显降低HoCoO3气敏元件的电阻,并显著提高其对汽油的灵敏度和选择性。这表明Cu2+掺杂改性的HoCoO3纳米材料将来极有可能成为一种良好的汽油敏感材料。
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| 关 键 词： | HoCoO3 稀土 复合氧化物 材料改性 气敏性能 |
structural modification and gas-sensing properties of HoCoO3 nanomaterials |
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| DENG Dehua,DU Weimin,ZHU Zhaoqiang,WEI Juan,GUO Jinfu.structural modification and gas-sensing properties of HoCoO3 nanomaterials[J].Electronic Components & Materials,2012,31(1):24-28. |
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| Authors: | DENG Dehua DU Weimin ZHU Zhaoqiang WEI Juan GUO Jinfu |
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| Affiliation: | (College of Chemistry and Chemical Engineering,Anyang Normal University,Anyang 455002,Henan Province,China) |
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| Abstract: | Cu2+-doped HoCoO3 nanomaterials were synthesized by the sol-gel method.The results of XRD and SEM characterization show that the prepared Cu2+-doped HoCoO3 nanomaterials possess pure perovskite structure while their grain size is 50~130 nm.Gas sensors were made from the Cu2+-doped and pure HoCoO3 nanomaterials,respectively,and their electrical and gas-sensing properties were studied.The results show that Cu2+ doping significantly reduces the resistance of HoCoO3 sensor and remarkably increases both the sensitivity and selectivity of the sensor to gasoline.This indicates that there is a big potential to apply the Cu2+-doped HoCoO3 nanomaterials as a good gasoline-sensing material in future. |
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| Keywords: | HoCoO3 rare earth mixed oxides material modification gas sensing property |
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