| Ce-Zr-Ba-O纳米材料的制备及其结构与性能研究 |
| Synthesis and Catalytic Properties of Nanosized Ce-Zr-Ba-O |
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| 摘要: 以金属硝酸盐为原料,分别采用高分子前驱体法、柠檬酸盐凝胶法制备了纳米级的Ce-Zr-Ba-O复合氧化物超细粒子,采用X-射线衍射(XRD)、透射电镜(TEM)、BET比表面测定、热重-差热(TG-DTA)技术对催化剂进行了表征,并考察了催化剂的CO氧化活性和热稳定性。实验结果表明,高分子前驱体法和柠檬酸盐凝胶法制备的催化剂粉体都达到了纳米级。两种方法中,高分子前驱体法所制得的催化剂的BET比表面达118.96m2·g-1,CO氧化反应活性较高,同时该方法制得的催化剂分散性好,无团聚,经1000℃高温焙烧后仍基本无烧结、无团聚现象,具有较高的热稳定性。 |
| 关键词: 制备方法 纳米粒子 Ce-Zr-Ba-O 催化剂 |
| 基金项目: |
| Abstract: Ce-Zr-Ba-O mixed oxides were prepared by two different methods, such as polymeric precursor method and citrate gel method. The catalysts were investigated by XRD, TEM, BET surface area and TG-DTA technologies. The results indicated that the nanosized particles were formed in both catalysts. Comparing the two methods, the catalyst prepared by polymeric precursor method showed the remarkable surface area, good thermal stability and high CO oxidation activity, and which was corresponding with the particle size. |
| Keywords: preparation method nanosized particle Ce-Zr-Ba-O catalyst |
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| 张培壮,陈敏,王月娟,郑小明.Ce-Zr-Ba-O纳米材料的制备及其结构与性能研究[J].无机化学学报,2002,18(12):1195-1199. |
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