K–Al-based mixed oxides as high-capacity carbon dioxide adsorbents
| Autor: | Masashige Suzuki, Tarun Chand Vagvala, Vit Kalousek, Munetoshi Sakai, Keita Ikeue |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Valence (chemistry) Metal ions in aqueous solution Inorganic chemistry General Physics and Astronomy Mullite 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences symbols.namesake chemistry.chemical_compound Adsorption chemistry Octahedron Polymerization Carbon dioxide symbols Physical and Theoretical Chemistry 0210 nano-technology Raman spectroscopy |
| Zdroj: | Chemical Physics Letters. 677:55-59 |
| ISSN: | 0009-2614 |
| DOI: | 10.1016/j.cplett.2017.03.087 |
| Popis: | K–Al-based mixed oxides (KAl6O9.5) with mullite structures were synthesized as CO2 adsorption materials using a polymerized complex method. Al3+ sites in the octahedral AlO6 units of K–Al-based mixed oxides were substituted with various metal ions with +2 or +3 valence states to enhance basicity. Among these samples, the Fe-introduced sample (KAl5.5Fe0.5O9.5) showed 130 times higher CO2 adsorption capacity than that of Li4SiO4. Raman spectra of these samples indicated that large distortions of the AlO6 unit were observed only for the Fe-introduced sample. Local polarization caused by such distortions could induce increased basicity of this sample. |
| Databáze: | OpenAIRE |
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