Effect of Precursors on the Preparation and Texture of Mesoporous γ-Al2O3 Powders
| Autor: | I. G. Polyakova, T. V. Khamova, L. V. Morozova |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science General Chemical Engineering Metals and Alloys chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Catalysis Inorganic Chemistry chemistry.chemical_compound Chemical engineering chemistry Volume (thermodynamics) Aluminium Specific surface area 0103 physical sciences Materials Chemistry Hydroxide Crystallite Texture (crystalline) 0210 nano-technology Mesoporous material |
| Zdroj: | Inorganic Materials. 56:353-359 |
| ISSN: | 1608-3172 0020-1685 |
| DOI: | 10.1134/s0020168520030139 |
| Popis: | We have studied processes underlying the formation of γ-Al2O3 from different precursors (aluminum hydroxide, aluminum isopropoxide, and aluminum nitrate) and synthesized mesoporous γ-Al2O3 powders at temperatures of 500 and 600°C. Texture parameters of the powders (specific surface area, average crystallite size, pore volume, pore shape, and pore size distribution) have been studied using low-temperature nitrogen adsorption measurements and X-ray diffraction, and the effect of the precursors on the texture parameters of γ-Al2O3 has been examined. We have demonstrated the possibility of obtaining γ-Al2O3 with a unimodal pore size distribution (2.5–4.5 and 4.5–8.0 nm, depending on the precursor) and a pore volume of ~0.550 cm3/g. The experimental results obtained here show that the texture characteristics of the synthesized γ-Al2O3 powders as catalyst supports compare well to those of their foreign analogues. |
| Databáze: | OpenAIRE |
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