Mesoporous In2O3 with Regular Morphology by Nanocasting: A Simple Relation between Defined Particle Shape and Growth Mechanism
Mesoporous In2O3 with Regular Morphology by Nanocasting: A Simple Relation between Defined Particle Shape and Growth Mechanism
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DOI：
10.1021/jp910336f
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发表时间：
2010-01
影响因子：
3.7
通讯作者：
Stefanie Haffer;T. Waitz;M. Tiemann
中科院分区：
文献类型：
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作者：
Stefanie Haffer;T. Waitz;M. Tiemann
使用各种多孔二氧化硅相（KIT-6、SBA-15）作为结构基体，通过纳米铸造制备具有有序、均匀介孔性的In2O3。 In2O3 颗粒表现出明确的形态（球形或椭圆形，取决于二氧化硅基质的选择）和在几百纳米范围内相当均匀的尺寸。 In2O3 颗粒的规则形态与二氧化硅基体的形态特性无关。相反，它是二氧化硅孔隙内 In2O3 生长机制的结果；对该机制进行了一些详细的研究。因此，纳米铸造方法提供了一种通用且简单的方法来制造具有规则形态的介孔In2O3；这对于许多需要明确形态特性的应用是有益的，例如气体传感或催化。
In2O3 with ordered, uniform mesoporosity is prepared by nanocasting, using various porous silica phases (KIT-6, SBA-15) as structure matrices. The In2O3 particles exhibit well-defined morphologies (spherical or ellipsoidal, depending on the choice of silica matrix) and quite uniform sizes in the range of a few hundred nanometers. The regular morphology of the In2O3 particles is not associated with the morphological properties of the silica matrices. Instead, it is the result of the growth mechanism of In2O3 inside the silica pores; this mechanism is investigated in some detail. Hence, the nanocasting method offers a versatile and simple way of creating mesoporous In2O3 with regular morphology; this will be beneficial for many applications that require well-defined morphological properties, such as gas sensing or catalysis.