Synthesis of hybrid zeolites using a solvent-free method in the presence of different organosilanes
| Autor: | Sabrine Canal, João Henrique Zimnoch dos Santos, Pedro Henrick Finger, Marcelo Luis Mignoni, Diego Ivan Petkowicz |
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| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Thermogravimetric analysis Hexamethyldisiloxane Materials science Inorganic chemistry Octadecyltrimethoxysilane 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Contact angle chemistry.chemical_compound Crystallinity chemistry Mechanics of Materials Sodalite General Materials Science Fourier transform infrared spectroscopy 0210 nano-technology Alkyl |
| Zdroj: | Microporous and Mesoporous Materials. 241:98-106 |
| ISSN: | 1387-1811 |
| DOI: | 10.1016/j.micromeso.2016.11.030 |
| Popis: | Hybrid sodalite zeolites were produced by grinding, homogenizing and heating the reactants, including different organosilanes, without the addition of solvent (water). Hybrid sodalite zeolites were produced in the presence of triethoxy(octyl)silane (C8Si), 3-chloropropyltrimethoxysilane, triethoxymethylsilane, hexamethyldisiloxane, octadecyltrimethoxysilane (ODS) and chlorotrimethylsilane. The resulting hybrid zeolites were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, water contact angle, small-angle X-ray scattering and thermogravimetric analysis. The presence of 6 wt.-% of organosilane introduced in the reaction medium caused no disturbance to the crystal growth. All materials exhibited dense, spherical and uniform particles, with slightly rough surfaces according to SAXS measurements. In the case of octadecylsilane, it appears that the alkyl chains are well packaged and organized, while for octylsilane, a more disordered structure seems to be present. Only organosilanes with longer alkyl chains (C8Si and ODS) show hydrophobic properties. The solvent-free method proved to be effective in synthesizing samples with good crystallinity and hydrophobic characteristics. This synthesis method was shown to be efficient, fast, economical and environmentally friendly. |
| Databáze: | OpenAIRE |
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