HoCoO_3纳米材料的结构改性与气敏性能  

Structural modification and gas-sensing properties of HoCoO_3 nanomaterials

作　　者：邓德华[1] 杜卫民[1] 朱兆强[1] 魏娟[1] 郭金福[1] 

机构地区：[1]安阳师范学院化学化工学院,河南安阳455002

出　　处：《电子元件与材料》2012年第1期24-28,共5页Electronic Components And Materials

基　　金：河南省教育厅科技攻关项目(No.2009B150002);河南省高等学校青年骨干教师资助项目(No.教高[2008]708号文件-112)

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50-130nm。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。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.

关 键 词：HoCoO3 稀土 复合氧化物 材料改性 气敏性能 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]