期刊文献+

钙钛矿型复合氧化物La_(0.5)Sr_(0.5)MnO_3的共沉淀制备与表征

The co-precipitation preparation and characterization of perovskite-type La_(0.5)Sr_(0.5)MnO_3 oxides
下载PDF
导出
摘要 采用共沉淀法合成了钙钛矿型复合氧化物La0.5Sr0.5MnO3.考察了共沉淀pH,煅烧温度,煅烧时间,分散剂PEG-4000等因素对产物性能的影响,并采用XRD,BET,SEM,H2-TPR等测试手段对所得产物进行了表征.结果表明,当共沉淀pH为10.5,煅烧温度850℃,煅烧时间4h时,得到了纯相的钙钛矿型La0.5Sr0.5MnO3;在合成中添加5%PEG-4000,可以有效的降低样品颗粒团聚,比表面积达23.44m2.g-1,并显著的增强了其氧化性能及结构稳定性. Perovskite structured mixed oxides La0.5Sr0.5MnO3 were successfully prepared by co-precipitation method.The effects of co-precipitation pH,calcination temperature,calcination time as well as PEG-4000 on the properties of the product have also been investigated.The sample obtained were characterized by means of XRD,BET,SEM and H2-TPR.The results indicated that when co-precipitation pH was 10.5,calcination temperature was 850℃,and calcination time was 4 h,single-phased La0.5Sr0.5MnO3 were obtained.When the amount of the dispersant PEG-4000 was 5%,it can remarkably alleviate the agglomeration of the particles,and the surface area of the product reached by 23.44 m2·g-1.The product prepared with PEG-4000 has better oxidizing capability and a higher structured stability.
出处 《华中师范大学学报(自然科学版)》 CAS 北大核心 2013年第1期68-72,共5页 Journal of Central China Normal University:Natural Sciences
基金 广东省教育部产学研结合项目(2011B090400070)
关键词 钙钛矿 复合氧化物 LA0 5Sr0 5MnO3 共沉淀法 perovskite composite oxides La0.5Sr0.5MnO3 co-precipitation method
  • 相关文献

参考文献11

  • 1Hirohito Hirata,Keisuke Kishita,Yasutaka Nagai. Characterization and dynamic behavior of precious metals in automotive exhaust gas purification catalysts[J].Catalysis Today,2011,(01):467-473.
  • 2李敏杰.负载型金催化剂在汽车尾气中的应用[J].环境与发展,2011,23(1):48-51. 被引量:1
  • 3Shelef M,McCabe R W. Twenty-five years after introduction of automotive catalysts:what next[J].Catalysis Today,2000,(01):35-50.
  • 4崔大伟.钙钛矿型稀土氧化物汽车尾气净化催化剂的研究进展[J].潍坊学院学报,2010,10(4):9-12. 被引量:2
  • 5Seyfi B,Baghalha M,Kazemian H. Modified LaCoO3 nanoperovskite catalysts for the environmental application of automotive CO oxidation[J].Chemical Engineering Journal,2009,(2-3):306-311.
  • 6Pecchi G,Patricio Reyes P,Zamora R. Effect of the preparation method on the catalytic activity of La1-xCaxFeO3 perovskite-type oxides[J].Catalysis Today,2008.420-427.
  • 7Niu Xin-shu,Li Hong-hua,Liu Guo-guang. Preparation,characterization and photocatalytic properties of REFeO3 (RE =Sm,Eu,Gd)[J].Journal of Molecular Catalysis A:Chemical,2005,(1-2):89-93.
  • 8Teraoka Y,Nakano K,Kagawa S. Synthesis of LaKMnO perovskite-type oxides and their catalytic property for simultaneous removal of NOx and diesel soot particulates[J].Applied Catalysis B:Environmental,2001,(01):73-78.
  • 9侯岩峰,范国梁,宋崇林,黄齐飞,张仲荣.La_(1-x)Ce_xCoO_3系钙钛矿型催化剂应用于柴油机尾气净化催化性能的研究[J].燃料化学学报,2006,34(1):85-90. 被引量:17
  • 10Kureti S,Weisweiler W,Hizbullah K. Simultaneous conversion of nitrogen oxides and soot into nitrogen and carbon dioxide over iron containing oxide catalysts in diesel exhaust gas[J].Applied Catalysis B:Environmental,2003,(03):281-291.

二级参考文献68

共引文献40

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部