高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (6): 1140.

• 研究论文 • 上一篇    下一篇

NOx在担载CeO2的纳米ZrO2上的吸附研究

黎维彬, 杨絮飞   

  1. 清华大学环境科学与工程系, 北京 100084
  • 收稿日期:2001-05-24 出版日期:2002-06-24 发布日期:2002-06-24
  • 通讯作者: 黎维彬(1966年出生),男,博士,副教授,从事环境催化研究.E-mail:wbli@mail.tsinghua.edu.cn E-mail:wbli@mail.tsinghua.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:29907003);清华大学基础研究基金(JC1999009);教育部留学回国人员基金资助

NOx Adsorption on CeO2-supported ZrO2 Nanometer Powders Prepared in Water-in-Oil Microemulsion

LI Wei-Bin, YANG Xu-Fei   

  1. Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2001-05-24 Online:2002-06-24 Published:2002-06-24

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摘要： 通过反相微乳液法制备了纳米级高比表面积ZrO2粉体材料,用TEM,XRD和氮气吸附BET比表面积等手段对其进行了表征,研究了Ce(NO3)3溶液浸渍的ZrO2粉体对氮氧化物的吸附活性.实验结果表明,5%Ce/ZrO2样品室温时可吸附NOx的最大值为34.5mg;100℃时为17.5mg;200℃时可达9.5mg.对比表明,同样条件下微乳液法制备的ZrO2对NOx的最大吸附量是一般沉淀法制备的ZrO2样品的2.5倍.纳米级ZrO2的特殊孔结构可能是导致微乳液法制备的ZrO2样品吸附量较高的主要原因.

关键词: 氮氧化物, 纳米氧化锆, 吸附, 反相微乳

Abstract: ZrO2 nanometer powders sizing around 5-8 nm were prepared in water in oil(W/O) microemulsion, and TEM, XRD, N2 adsorption were employed to characterize the powders. A Ce-Zr-m sample was obtained after incipiently impregnating the above powders with a Ce(NO3)3 aqueous solution. NOx adsorption was conducted on the sample in a fluidized thermal analysis system and the maximum adsorption amounts of 35.5, 17.5 and 9.5 mg NOx per gram sorbent were obtained at 25, 100 and 200 ℃, respectively, on the Ce-Zr-m sample. It is not worthy that the value at 100 ℃ was 25 times higher than that on the CeO2 supported ZrO2 sample prepared by conventional precipitation.

Key words: Nitric oxide, Nanometer zrconia, Adsorption, Reverse microemulsion

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