Facile synthesis of ceria rhombic microplates
Facile synthesis of ceria rhombic microplates
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DOI：
10.1007/s10853-008-2876-7
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发表时间：
2008-07
影响因子：
4.5
通讯作者：
Dengsong Zhang;Lei Huang;Jian-ping Zhang;Liyi Shi
中科院分区：
文献类型：
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作者：
Dengsong Zhang;Lei Huang;Jian-ping Zhang;Liyi Shi
对具有受控尺寸和形状的无机颗粒的制造的兴趣是由其潜在的独特和可调的物理性质以及从微米或纳米级构建块设计先进的块体材料的愿望驱动的[1，2]。CeO 2是一种技术上重要的稀土材料，因为其作为快离子导体、储氧电容器、催化剂、紫外线阻断剂、抛光材料和光学显示器的广泛应用[3-7]。近年来，我们和其他研究小组已经合成了具有不同形状的单晶和多晶氧化铈微米或纳米结构，例如纳米多面体[8]、纳米立方体[9]、纳米球[10]、纳米棒/纳米线[11-16]、核壳纳米线[17]、纳米管[18，19]和三角形微片[20]。研究发现，微纳米材料的性能和应用与其形貌和尺寸有关。例如，Guo et al. [20]以Ce（OH）CO 3微片为前驱体，采用热分解-氧化法合成了CeO 2三角形微片，并指出这些具有三角形结构的材料在催化剂、储氢器件、光学或电学功能主体材料等多个领域具有潜在的应用前景。Zhong等人[21]报道，花状微氧化铈不仅可用作水处理中污染物去除的有效吸附剂，而且可用作金纳米颗粒的优良载体，通过催化氧化去除CO，在环境修复中显示出很好的潜力。Sun等人[22]报道了单分散花状二氧化铈微球可用作具有各种用途的催化剂的载体。以往的研究表明，具有特殊形貌的微氧化铈在各个领域有着潜在的应用。然而，关于CeO 2菱形微板的制备研究却很少报道。最近，我们使用CTAB作为表面活性剂在低温水热条件下合成了CeO 2纳米片、纳米棒和纳米管[23]，并且我们还开发了一种简便的无模板液相沉淀法来合成CeO 2纳米棒、纳米管、纳米线和纳米立方体[24]。在此，我们首次报道了一种简单的表面活性剂辅助的方法来合成CeO 2菱形微片。
Interest in the fabrication of inorganic particles with controlled size and shape is driven by their potential unique and tunable physical properties and the desire to engineer advanced bulk materials from micro-or nano-scale building blocks [1, 2]. CeO2 is a technologically important rare earth material because of its wide applications as fast ion conductors, oxygen storage capacitors, catalysts, UV blockers, polishing materials, and optical displays [3–7]. Both single crystal and polycrystalline ceria micro-or nano-structures with different shapes, such as nanopolyhedra [8], nanocubes [9], nanospheres [10], nanorods/nanowires [11–16], coreshell nanowires [17], nanotubes [18, 19], and triangular microplates [20] have been synthesized by us and other research groups in recent years. It is found that the properties and applications of micro-or nano-materials are related to their morphologies and sizes. For example, Guo et al.[20] synthesized CeO2 triangular microplates by a thermal decomposition–oxidation process using Ce (OH) CO3 microplates as the precursor, and suggested that these materials with triangular structures could find potential applications in multiple fields as catalysts, storage hydrogen devices, and optically or electrically functional host materials. Zhong et al.[21] reported that the flowerlike micro-ceria can be used as not only an effective sorbent for the removal of pollutants in water treatment but also as an excellent support for gold nanoparticles to remove CO by catalytic oxidation, demonstrating a promising potential in environmental remediation. Sun et al.[22] reported that the monodisperse flowerlike ceria microspheres can be used as a support for catalysts with various purposes. Previous reports show that micro-ceria with the special morphology has a potential application in various fields. However, few studies have been reported on the fabrication of CeO2 rhombic microplates. Recently, we synthesized CeO2 nanoplates, nanorods, and nanotubes using CTAB as a surfactant under a low-temperature hydrothermal condition [23], and we also developed a facile template-free liquid precipitation method to synthesize CeO2 nanorods, nanotubes, nanowires, and nanocubes [24]. Herein, we first report a simple surfactant-assisted method to synthesize CeO2 rhombic microplates.