Abstract—
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.
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ACKNOWLEDGMENTS
We are grateful to I.A. Drozdova for performing the electron-microscopic characterization of the alumina precursors.
Funding
This work was supported by the Russian Federation Ministry of Science and Higher Education through the state research target for the Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, as part of the research theme Inorganic Synthesis and Characterization of Ceramic and Organic–Inorganic Composite Materials and Coatings, state registration (Executive Branch’s Center for Information Technologies and Systems) no. AAAA-A19-119022290091-8.
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Morozova, L.V., Khamova, T.V. & Polyakova, I.G. Effect of Precursors on the Preparation and Texture of Mesoporous γ-Al2O3 Powders. Inorg Mater 56, 353–359 (2020). https://doi.org/10.1134/S0020168520030139
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DOI: https://doi.org/10.1134/S0020168520030139