| 纳米晶LaCoO3和La1—xSrxCoO3的制备及其催化氧化性能研究 |
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| 引用本文： | 刘源,秦永宁.纳米晶LaCoO3和La1—xSrxCoO3的制备及其催化氧化性能研究[J].天津大学学报(自然科学与工程技术版),1999,32(2):229-232. |
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| 作者姓名： | 刘源 秦永宁 |
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| 作者单位： | 天津大学化工学院 |
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| 摘 要： | 研究发现以Ｎａ２ＣＯ３－ＮａＯＨ为沉淀剂，结合超临界干燥法，是合成纳米晶ＬａＣｏＯ３及Ｌａ１－ｘＳｒｘＣｏＣＯ３（其中ｘ≤０．３）的有效途径。以此法可制得平均粒径约１５ｎｍ的ＬａＣＯ３和平均粒径约３５ｎｍ的Ｌａ０．８Ｓｒ０．２ＣｏＯ３．ＬａＣｏＯ３对ＣＯ的催化氧化活性随粒径的减小明显提高，纳米晶ＬａＣｏＯ３中镧被锶部分取代可显著提高对ＣＯ氧化的催化活性。
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| 关 键 词： | 纳米晶 LaCoO3 氧化 PTO 稀土复合氧化物 催化剂 |
The Synthesis and Catalytic Activity of Nanocrystalline LaCoO 3 and La 1- x Sr x CoO 3 |
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| Liu,Yuan,Qin,Yongning,Qi,Xiaozhou,Liao,Zhencheng.The Synthesis and Catalytic Activity of Nanocrystalline LaCoO 3 and La 1- x Sr x CoO 3[J].Journal of Tianjin University(Science and Technology),1999,32(2):229-232. |
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| Authors: | Liu Yuan Qin Yongning Qi Xiaozhou Liao Zhencheng |
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| Abstract: | A technique of synthesizing nanocrystalline La 1- x Sr x CoO 3 with a perovskite structure was developed.The solution of Na 2CO 3 NaOH was taken as precipitating agent.By it and the supercritical drying method.Nanocrystalline LaCoO 3 and La 0.8 Sr 0.2 CoO 3 with a mean particle size about 15 nm and 35 nm respectively were made.It was shown that the activity of the carbon monoxide oxidation over LaCoO 3 increased significantly with the decrease of its particle size and the substitution of strontium for lanthanum in nanometer LaCoO 3 could raise the activity effectively. |
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| Keywords: | nanocrystalline LaCoO 3 catalytic oxidation supercritical drying |
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