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.
出处
《电子元件与材料》
CAS
CSCD
北大核心
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)
