Titania sols as precursors in sol-gel technologies of composite materials for photocatalysis, electrorheology, sorption
| Autor: | O. A. Alisienok, M. S. Novitskaya, A. I. Maximovskikh, A. N. Murashkevich, Olga V. Fedorova, I. M. Zharskiy |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Aqueous solution Composite number Sorption 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials Biomaterials Ammonium hydroxide chemistry.chemical_compound Adsorption chemistry Specific surface area Materials Chemistry Ceramics and Composites Photocatalysis Composite material 0210 nano-technology Sol-gel |
| Zdroj: | Journal of Sol-Gel Science and Technology. 92:254-263 |
| ISSN: | 1573-4846 0928-0707 |
| DOI: | 10.1007/s10971-019-04981-w |
| Popis: | Using titania sols, composite materials with improved photocatalytic, sorption, and electrorheological properties were obtained. It was found that an increase in the photocatalytic activity of the composite “SiO2 core–TiO2 shell” is achieved by means of introducing ammonium hydroxide (n(NH4OH)/n(TiO2) = 0.06–0.37) and a treatment temperature of 750–800 °C. A correlation was established between amounts of the introduced modifiers (Al, P) and the structuring component (NH4)2CO3 and the properties of the filler for electrorheological dispersions (ERD): specific surface area, bulk density. The distribution of modifier components between the volume of particles of the main component (TiO2) and their surface was demonstrated to be 1:1. It was established that immobilization of crown ethers (CE) on the surface of SiO2–TiO2 composite particles leads to a significant increase in the adsorption capacity of the resulting organic-mineral composite for a number of metal cations in acidic aqueous solutions. |
| Databáze: | OpenAIRE |
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