摘要
采用碳微球模板法制备了LaMnO3纳米空心球催化剂,采用热重分析、X射线衍射、扫描电子显微镜、透射电子显微镜和比表面积分析仪(BET)对催化剂进行了表征,利用程序升温反应评价了催化剂用于消除汽车尾气中CO和碳氢化合物的催化活性.通过系统的研究发现,采用煅烧温度600℃制备的LaMnO3纳米空心球具有最高的催化活性.
LaMnO3 hollow nanospheres were prepared using carbon microballons as templates.The samples were characterized by means of TG-DTA,XRD,SEM,TEM and BET.The catalytic activities of the nanospheres for the conversion of CO and hydrocarbon compounds into CO2 were evaluated in a temperature programmed microreactor system.It was found that different calcination temperatures resulted in the formation of the nanospheres with different shapes,specific surface areas and catalytic activity.The sample calcined at 600 ℃ has a diameter of 30 nm and a specific surface area of 51.99 m2 ·g-1,and has the highest catalytic activity for CO and hydrocarbon conversion.
出处
《环境化学》
CAS
CSCD
北大核心
2011年第4期808-811,共4页
Environmental Chemistry
基金
国家自然科学基金(20875007)
北京市科学技术计划项目(Z080003032208012)资助
关键词
LAMNO3
模板法
纳米空心球
催化剂
LaMnO3 perovskite
template method
hollow nanosphere
catalyst.
