LaCoO3纳米粒子的制备、掺杂及丙酮敏感性能研究
Preparation,Doping and Acetone Sensing Performance of LaCoO3 Nanoparticles
袁杰 1刘沛东 1邓婷 1赵广源 1黄鹤燕 2谢瑞士 2张行泉 3刘海峰3
作者信息
- 1. 西南科技大学 材料与化学学院,四川 绵阳 621010
- 2. 西南科技大学 分析测试中心,四川 绵阳 621010
- 3. 西南科技大学 材料与化学学院,四川 绵阳 621010;西南科技大学 分析测试中心,四川 绵阳 621010
- 折叠
摘要
为了开发新型的钙钛矿钴氧化物气敏材料,探究不同掺杂离子及掺杂量对LaCoO3 气敏性能的影响,以La(NO3)3·6H2O、Co(NO3)3·6H2O、丙烯酰胺、柠檬酸为主要原料,采用溶胶-凝胶法制备了钙钛矿结构的LaCoO3 及A位Ca2+、Sr2+掺杂的纳米粒子.利用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、红外光谱(IR)对样品的结构、形貌、半导体性质进行了表征,研究了不同掺杂量对LaCoO3 纳米粒子晶粒大小、活化能等的影响.结果表明,A位Ca2+、Sr2+掺杂可以增大LaCoO3 晶粒的生长活化能、抑制晶粒生长;对制得样品进行丙酮敏感性能测试后发现,Ca2+、Sr2+掺杂均可提高LaCoO3 对丙酮的响应能力,尤其是Ca2+掺杂量为15%时,样品对2%体积分数丙酮的灵敏度可达97.83%.
Abstract
In order to develop new perovskite cobalt oxide gas sensitive materials,investigate the effects of different doping ions and doping con-centrations on the gas sensitive performance of LaCoO3,perovskite-type LaCoO3 and A-site-doped LaCoO3 with Ca2+and Sr2+nano-particles were pre-pared by sol-gel method using La(NO3)3·6H2O,Co(NO3)3·6H2O,acrylamide,and citric acid as main raw materials.The crystal structure,morphology,and semiconductor property of the samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),and infrared spectroscopy(IR).The effects of doping amounts on the grain size and activation energy of LaCoO3 nanoparticles were studied.The results show that doping with Ca2+and Sr2+at A sites can increase the grain growth activation energy of LaCoO3 and inhibit grain growth.The gas sensing test results indicate that doping with Ca2+and Sr2+can enhance the response ability of LaCoO3 to acetone,especially when the doping level of Ca2+is 15%,the sensitivity of the sample to 2%volume concentration of acetone can reach 97.83%.
关键词
钙钛矿结构/溶胶-凝胶法/LaCoO3/掺杂/丙酮Key words
perovskite structure/sol-gel method/LaCoO3/doping/acetone引用本文复制引用
基金项目
国家自然科学基金(51502249)
四川省科技厅应用基础研究项目(2020YJ0419)
四川省大学生创新创业训练计划(S20231061907423XCY074)
出版年
2024
NETL
NSTL
万方数据