The effect of the concentration of vanadium pentoxide hydrogel applied on ASD-4 grade aluminum on its structural and adsorption properties
https://doi.org/10.17073/1997-308X-2021-1-4-11
Abstract
The effect of the concentration of V2O5 vanadium pentoxide hydrogel applied in concentrations 5 and 10 % on ASD-4 grade aluminum, on its structural and adsorption properties was studied by the low-temperature nitrogen adsorption method. High-purity nitrogen was used as an adsorbate. Adsorption isotherms were measured with the specific surface area and porosity of powders calculated and results of morphology studies presented. Since BET diagrams are linear in the interval of relative pressures from 0.05 to 0.35 Р/Р0 , the BET model is well applicable for the calculation of the specific surface area of samples. According to our calculations, the specific surface area was 0.65 m2/g for ASD-4 sample, 6 m2/g for ASD-4 + 5 % V2O5 composition, and 16 m2/g for ASD-4 + 10 % V2O5. Therefore, hydrogel application increases the specific surface area of initial ASD-4 tenfold and more. Grain size analysis showed that both samples have a rather narrow particle size distribution after hydrogel application, which indicates the monodispesity of the system. The average particle size was ~5÷7 μm for ASD-4, ~9 μm for ASD-4 + 5 % V2O5 , and ~11 μm for ASD-4 + 10 % V2O5. It was established that mesopores 35 to 40 Å in radius appeared in the modified sample due to the layered structure of xerogel applied. It was shown that the ASD-4 + 10 % V2O5 sample exhibits the greatest adsorption activity.
Supporting agencies: The research was carried out on State-Funded Topic No. АААА-А19-119031890028-0.
About the Authors
A. V. Ryabina
Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Sciences (ISSC UB RAS)
Russian Federation
Russian Federation
Cand. Sci. (Chem.), research scientist of the Laboratory «Physical chemistry of disperse systems»
620990, Ekaterinburg, Pervomaiskaya str., 91
V. G. Shevchenko
Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Sciences (ISSC UB RAS)
Russian Federation
Russian Federation
Dr. Sci. (Chem.), chief scientific officer, head of the Laboratory «Physical chemistry of disperse systems»
Ekaterinburg
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Review
For citations:
Ryabina A.V., Shevchenko V.G. The effect of the concentration of vanadium pentoxide hydrogel applied on ASD-4 grade aluminum on its structural and adsorption properties. Powder Metallurgy аnd Functional Coatings (Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional'nye Pokrytiya). 2021;(1):4-11. (In Russ.) https://doi.org/10.17073/1997-308X-2021-1-4-11
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