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首页> 外文期刊>Journal of Materials Science >One pot synthesis of mesostructured non-silica oxides nanocrystallites
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One pot synthesis of mesostructured non-silica oxides nanocrystallites

机译:一锅法合成介孔结构的非二氧化硅纳米晶体

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摘要

Some typical worm-like mesoporous non-silica oxides, titania, zirconia, and dopants-incorporated zirconia oxides, with homogeneous nanocrystalline framework and narrow pore-size distribution have been synthesized via a facile process templated from composite surfactant of a long chain poly block copolymer combined with non-ionic alkyl-PEO surfactant (Brij56) under the hydrothermal condition. Bi- or even multi-component zirconia-based composites with further addition of other oxide compositions can also be obtained with well-defined mesoporous structure and nanocrystalline framework. These mesostructured oxides/composite oxides show high surface area, well-crystallization framework, and high thermal stability. XRD, nitrogen adsorption analysis, TEM, and EDX were used for the structural characterizations. The use of non-ionic block-copolymer surfactant is believed to be responsible for the crystallization of mesoporous framework and high thermal stability at high temperature without structural collapse.
机译:以长链聚嵌段共聚物的复合表面活性剂为模板,通过简便的方法合成了一些典型的蠕虫状介孔非氧化硅,二氧化钛,氧化锆和掺有掺杂剂的氧化锆,具有均一的纳米晶骨架和狭窄的孔径分布。在水热条件下与非离子型烷基-PEO表面活性剂(Brij56)混合。还可以得到具有明确定义的中孔结构和纳米晶体骨架的双或什至多组分基于氧化锆的复合材料,进一步添加其他氧化物组合物。这些介孔结构的氧化物/复合氧化物表现出高的表面积,良好的结晶构架和高的热稳定性。 XRD,氮吸附分析,TEM和EDX用于结构表征。据信使用非离子型嵌段共聚物表面活性剂负责介孔骨架的结晶和高温下的高热稳定性,而不会发生结构塌陷。

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