| NOx在担载CeO2的纳米ZrO2上的吸附研究 |
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| 引用本文： | 黎维彬,杨絮飞. NOx在担载CeO2的纳米ZrO2上的吸附研究[J]. 高等学校化学学报, 2002, 23(6): 1140-1142 |
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| 作者姓名： | 黎维彬 杨絮飞 |
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| 作者单位： | 清华大学环境科学与工程系, 北京 100084 |
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| 基金项目： | 国家自然科学基金，清华大学校科研和教改项目，教育部留学回国人员科研启动基金，29907003，JC1999009，，，， |
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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.
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| 关 键 词： | 氮氧化物 纳米氧化锆 吸附 反相微乳 |
| 文章编号： | 0251-0790(2002)06-1140-03 |
| 收稿时间： | 2001-05-24 |
NOx Adsorption on CeO2-supported ZrO2 Nanometer Powders Prepared in Water-in-Oil Microemulsion |
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| LI Wei Bin ,YANG Xu Fei. NOx Adsorption on CeO2-supported ZrO2 Nanometer Powders Prepared in Water-in-Oil Microemulsion[J]. Chemical Research In Chinese Universities, 2002, 23(6): 1140-1142 |
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| Authors: | LI Wei Bin YANG Xu Fei |
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| Affiliation: | Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China |
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| 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. |
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| Keywords: | Nitric oxide Nanometer zrconia Adsorption Reverse microemulsion |
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