物理化学学报 >> 2007, Vol. 23 >> Issue (05): 659-663.doi: 10.3866/PKU.WHXB20070508

研究论文 上一篇    下一篇

两种络合剂对Ce-Sn-O复合氧化物结构与性能的影响

张晓菲; 胡瑞生; 高官俊; 孟和; 苏海全   

  1. 内蒙古大学化学化工学院稀土材料重点实验室, 内蒙古 呼和浩特 010021
  • 收稿日期:2006-09-08 修回日期:2006-12-06 发布日期:2007-04-28
  • 通讯作者: 胡瑞生 E-mail:huruisheng@126.com

Influence of Two Complexants on Structure and Performance of Ce-Sn-O Complex Oxides

ZHANG Xiao-Fei; HU Rui-Sheng; GAO Guan-Jun; MENG He; SU Hai-Quan   

  1. Key Laboratory of Rare Earth Materials, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, P. R. China
  • Received:2006-09-08 Revised:2006-12-06 Published:2007-04-28
  • Contact: HU Rui-Sheng E-mail:huruisheng@126.com

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摘要： 分别以柠檬酸、葡萄糖为络合剂, 用溶胶-凝胶法制备了CeO2和掺杂少量Sn的Ce-Sn-O复合氧化物, 利用XRD、TPR、FT-IR、比表面法、TEM等方法表征了四种催化剂的物理化学性质, 同时以甲烷催化燃烧反应为探针对其进行了活性评价. 结果表明, 以葡萄糖为络合剂合成的掺杂锡后的样品其甲烷完全转化温度较低, 比表面积较大, 通过透射电子显微镜观察, 平均晶粒大小为14 nm 左右, 且分散性良好, 而相比之下柠檬酸为络合剂合成的样品出现明显的团聚现象.

关键词: 葡萄糖, 柠檬酸, 溶胶-凝胶法, 甲烷燃烧

Abstract: The CeO2 and Ce-Sn-O complex oxides were prepared by sol-gel method using citric acid and glucose as complexing agents, respectively. The complex oxides were characterized by XRD, TPR, FT-IR, BET, and TEM, and their catalytic activities for the combustion of methane were evaluted. The results showed that the Ce-Sn-O complex oxide, which used glucose as complexing agent, had lower complete methane conversion temperature and larger specific surface area. The TEManalysis of the Ce-Sn-O complex oxide, which used glucose as complexing agent, revealed that the particles had a mean size of 14 nm and better dispersity, while the catalyst which used citric acid as complexing agent was seriously agglomerated.

Key words: Glucose, Citric acid, Sol-gel method, Methane combustion

MSC2000: 

  • O643