华南理工大学学报(自然科学版) ›› 2006, Vol. 34 ›› Issue (9): 99-103.

• 材料科学与技术 • 上一篇    下一篇

莫来石纤维陶瓷负载La0.8Sr0.2CoO3的制备及催化性能

曾令可1 段碧林1 刘平安1 王慧1 税安泽1 刘艳春1 王小华2   

  1. 1.华南理工大学 材料科学与工程学院,广东 广州 510640;2.吉首大学 化学化工学院,湖南 吉首 416000
  • 收稿日期:2005-10-09 出版日期:2006-09-25 发布日期:2006-09-25
  • 通信作者: 曾令可(1944-),男,教授,博士生导师,主要从事无机非金属材料研究 E-mail:lingke@scut.edu.cn
  • 作者简介:曾令可(1944-),男,教授,博士生导师,主要从事无机非金属材料研究
  • 基金资助:

    国家自然科学基金资助项目(50276017);广东省科技攻关项目(2005B10301026);广东省经贸委财政技术创新专项资金资助项目(200501008)

Preparation and Catalytic Performance of La0.8Sr0.2CoO3Supported on M ullite Fiber Ceramic

Zeng Ling-ke1  Duan Bi-lin1  Liu Ping-an1  Wang Hui1  Shui An-ze1  Liu Yan-chun1  Wang Xiao-hua2   

  1. 1.School of Materials Science and Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China;2.College of Chemistry and Chemical Engineering, Jishou Univ.,Jishou 416000.Hunan,China
  • Received:2005-10-09 Online:2006-09-25 Published:2006-09-25
  • Contact: 曾令可(1944-),男,教授,博士生导师,主要从事无机非金属材料研究 E-mail:lingke@scut.edu.cn
  • About author:曾令可(1944-),男,教授,博士生导师,主要从事无机非金属材料研究
  • Supported by:

    国家自然科学基金资助项目(50276017);广东省科技攻关项目(2005B10301026);广东省经贸委财政技术创新专项资金资助项目(200501008)

摘要: 采用浸渍法制备了以莫来石纤维多孔陶瓷为载体的La0.8Sr0.2CoO3钙钛矿材料,利用扫描电子显微镜及x射线衍射仪对样品进行了表征,发现莫来石纤维陶瓷载体表面负载有钙钛矿型复合氧化剂.进而研究了载体催化剂对NO和CO的催化活性,并讨论了添加为0.1%(质量分数)的PdC12对La0.8Sr0.2CoO3钙钛矿材料催化活性的影响.结果表明,未添加Pd时,601℃下NO的转化率达到74.5% ,CO的转化率高达99% ;在添加少量Pd之后,350℃ 下CO和NO的转化率均达到100% .

关键词: 钙钛矿型La0.8Sr0.2CoO3, 莫来石纤维, 多孔陶瓷, 载体, 铅, 催化活性

Abstract:

The perovskite-type La0.8Sr0.2CoO3supported on the mullite fiber porous ceramic was prepared by means of impregnation method,and was then characterized by SEM and XRD,thus coming to the( onclusion that the perovskite-type composite oxidant can disperse on the surface of mullite fiber ceramic. The catalytic activity of La0.8Sr0.2CoO3for NO and CO was also evaluated. The effect of the doped PdCl2,with a mass fraction of 0.1% on the catalytic activity of the perovskite-type La0.8Sr0.2CoO3 was finally discussed.The results show that the conver-sion rates of NO and CO respectively reach 74.5% and 99% at 601 ℃ without Pd doping.and both reach 100%at 350 ℃ with little Pd doping.

Key words: perovskite-type La0.8Sr0.2CoO3, mullite fiber, porous ceramic, carrier, palladium, catalytic activity