Morphology and Structure of ZrO2/TiO2/SiO2 Nanocomposites Obtained by Synthesis on Carbon Microfiber
| Autor: | E. I. Voit, V. G. Kuryavyi, Yu. V. Sushkov, V. V. Zheleznov |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Journal of Applied Spectroscopy. 80:581-588 |
| ISSN: | 1573-8647 0021-9037 |
| Popis: | We present novel nanomaterials based on Ti, Zr, and Si oxides, synthesized by the template method on a carbon fiber support. We have studied their structural and morphological properties. All the oxide fibers obtained have an extended surface formed from nanoparticle aggregates. We show that by selecting the components and varying their ratios, we can change the microorganization of the fiber surface and the structure of the composites. Due to microstress arising in the lattice, rearrangement of the structure of the composite is accompanied by a decrease in the fiber length and diameter. Increasing the amount of stabilizing additives of SiO2 in the titanium dioxide reduces the size of the nanoparticles and inhibits their growth, and makes it possible to stabilize the structure of the TiO2 nanoparticles in the anatase phase. At the same time, the presence of ZrO2 in the composition of the composites allows us to modify the particles at the reactive interface between the components and to obtain a fiber composite with a new crystal structure. For a low ZrO2 concentration (~10 wt.%), the structure of the oxide fibers is formed by TiO2 nanoparticles of the anatase modification, coated with an amorphous mixture of the oxides SiO2 and ZrO2. When the ZrO2 concentration is increased (~50.5 wt.%), we observe formation of nanoparticles with the structure of the orthorhombic phase of the compound ZrTiO4. |
| Databáze: | OpenAIRE |
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