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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Nano-size effects of NH4Al(OH)(2)CO3 on construction CeO2-ZrO2-Al2O3 materials with high performance
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Nano-size effects of NH4Al(OH)(2)CO3 on construction CeO2-ZrO2-Al2O3 materials with high performance

机译：NH4AL（OH）（2）二氧化碳纳米尺寸效应施工CEO2-ZRO2-AL2O3高性能

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Nanomaterials have been widely used in environmental catalysis and size dependency of these nanoma-terials has always been a focus of intensive studies for technological applications. In this paper, a serials of NH4Al(OH)(2)CO3 (AACH) with different crystal size (6.3, 7.6, 8.8, 10.0 and 12.7 nm) was achieved through growth control by a facile hydrothermal treatment at different temperatures, after which the CeO2-ZrO2-Al2O3(CZA) materials were prepared through a deposition-precipitation method. Then the size dependencies of textural properties, thermal stability and redox properties in CZA materials were disclosed. The results indicate that the crystal size of AACH not only affected the driving force of sintering, but also played a significant role in coordinating the interaction among the multi-components. Among these materials, the AACH with moderate crystallite size of 8.8 nm facilitates to improve the thermal stability of pore structure, highly disperse CeO2-ZrO2(CZ) nanoparticles, adjust the interaction between Al2O3 and CZ, to form homogeneous CZ solid solution. Consequently, when the grain size of AACH is 8.8 nm, the resulting CZA material exhibits the largest specific surface, the lowest reduction temperature, the most active oxygen species and the best soot oxidation activity even being thermally aged at 1000 degrees C for 4 h compared with others. (C) 2021 Published by Elsevier B.V.
机译：纳米材料在环境催化中有着广泛的应用，纳米材料的尺寸依赖性一直是技术应用研究的重点。本文通过在不同温度下进行简单的水热处理，通过生长控制，获得了一系列不同晶粒尺寸（6.3、7.6、8.8、10.0和12.7nm）的NH4Al（OH）（2）CO3（AACH），然后通过沉积沉淀法制备了CeO2-ZrO2-Al2O3（CZA）材料。然后揭示了CZA材料的织构性能、热稳定性和氧化还原性能的尺寸依赖性。结果表明，AACH的晶粒尺寸不仅影响烧结的驱动力，而且对协调多组分之间的相互作用起着重要作用。在这些材料中，晶粒尺寸为8.8nm的AACH有助于提高孔结构的热稳定性，高度分散CeO2-ZrO2（CZ）纳米颗粒，调节Al2O3和CZ之间的相互作用，形成均匀的CZ固溶体。因此，当AACH的晶粒尺寸为8.8 nm时，与其他材料相比，即使在1000℃下热老化4 h，所得CZA材料仍具有最大的比表面积、最低的还原温度、最活跃的氧物种和最佳的烟尘氧化活性。（c）2021由爱思唯尔B.V出版。

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