机构地区: 深圳大学师范学院化学生物系
出 处: 《环境化学》 2004年第3期247-251,共5页
摘 要: 采用浸渍法制备La0 8Sr0 2 MnO3负载型纳米催化剂 ,用X 射线衍射仪 (XRD) ,扫描电镜 (SEM)对催化剂负载层的表面形态、晶相结构和粒径大小进行了表征 .并考察了催化剂对油烟低温燃烧的催化活性 ,以及不同负载量和不同浸渍时间对催化活性的影响 .结果显示 ,催化剂经 70 0℃焙烧后形成了钙钛矿La0 8Sr0 2 MnO3纳米晶粒 ,催化剂对油烟催化燃烧具有较好的低温高活性 . Supported La 0.8 Sr 0.2 MnO 3 catalysts for oil-smog combustion were prepared by impregnation method.The surface characteristics of catalysts were analyzed with XRD and SEM.The catalytic activities of catalysts were investigated.The results show that perovskite-type oxide La 0.8 Sr 0.2 MnO 3 is formed on the surface of porous ceramics by calcining at 700℃.The catalytic activities of catalyst on oil-smog low-temperature combustion are excellent,and the content of La 0.8 Sr 0.2 MnO 3 and the impregntion time can affect the catalytic activities of catalyst.