Surface-Casting Synthesis of Mesoporous Zirconia with a CMK-5-Like Structure and High Surface Area
Autor: | Shunsuke Asahina, Zhengwen Cao, Osamu Terasaki, Bernd Spliethoff, Dong Gu, Wolfgang Schmidt, Hans Bongard, Ferdi Schüth, Christian M. Pichler |
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Rok vydání: | 2017 |
Předmět: |
Surface (mathematics)
Materials science Oxide General Medicine 02 engineering and technology General Chemistry Carbon nanotube Mesoporous silica 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Casting Catalysis 0104 chemical sciences law.invention chemistry.chemical_compound Silanol chemistry Chemical engineering law Cubic zirconia 0210 nano-technology Mesoporous material |
Zdroj: | Angewandte Chemie International Edition. 56:11222-11225 |
ISSN: | 1433-7851 |
Popis: | About 15 years ago, the Ryoo-group described the synthesis of CMK-5, a material consisting of a hexagonal arrangement of carbon nanotubes. Extension of the surface casting synthesis to oxide compositions, however, was not possible so far, in spite of many attempts. Here it is demonstrated, that crystalline mesoporous hollow zirconia materials with very high surface areas up to 400 m2·g-1, and in selected cases in the form of CMK-5-like, are indeed accessible via such a surface casting process. The key for the successful synthesis is an increased interaction between the silica hard template surface and the zirconia precursor species by using silanol group-rich mesoporous silica as a hard template. The surface areas of the obtained zirconias exceed those of conventionally hard-templated ones by a factor of two to three. The surface casting process seems to be applicable also to other oxide materials. |
Databáze: | OpenAIRE |
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