Synthesis of macroporous titania and inorganic composite materials from coated colloidal spheres - A novel route to tune pore morphology.
Synthesis of macroporous titania and inorganic composite materials from coated colloidal spheres - A novel route to tune pore morphology.
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DOI：
10.1021/cm001184j
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发表时间：
2001-01
影响因子：
8.6
通讯作者：
Dayang Wang;R. Caruso;F. Caruso
中科院分区：
文献类型：
--
作者：
Dayang Wang;R. Caruso;F. Caruso
一种制备具有定制孔形态（即，孔壁厚度和开孔或闭孔结构）。聚苯乙烯（PS）胶体球包覆有聚乙烯（PE）多层膜（PS-PE）或二氧化硅纳米颗粒（SiO2）/PE混合多层膜（PS-SiO2/PE）已被用作模板以产生大孔结构。二氧化钛（TiO 2）的前体，异丙醇钛（IV），渗透到模板的紧密包装的涂层胶体球，然后通过煅烧除去的有机材料（PS核心和PE层），大孔TiO 2和无机复合结构的生产。所得大孔结构的孔形态取决于沉积在胶体球上的多层膜的性质。开孔结构是通过模板PS−PE胶体球的紧密堆积组件获得的，而封闭的孔结构是通过模板PS−SiO2/PE颗粒ASSE-A获得的。
A new method for fabricating macroporous inorganic and inorganic composite materials with tailored pore morphologies (i.e., pore wall thickness and open or closed pore structure) is described. Polystyrene (PS) colloidal spheres coated with polyelectrolyte (PE) multilayers (PS−PE) or silica nanoparticle (SiO2)/PE hybrid multilayers (PS−SiO2/PE) have been used as templates to produce macroporous structures. By infiltration of a titanium dioxide (TiO2) precursor, titanium (IV) isopropoxide, into templates of close-packed coated colloidal spheres, followed by removal of the organic material (PS core and PE layers) by calcination, macroporous TiO2 and inorganic composite structures were produced. The pore morphology of the resulting macroporous structures depends on the nature of the multilayers deposited on the colloidal spheres. Open pore structures were obtained by templating close-packed assemblies of PS−PE colloidal spheres, while a closed pore structure was achieved by templating PS−SiO2/PE particle asse...