Sol-gel synthesis of nanostructured cobalt oxide in four different ionic liquids.

Autor: Al Kiey, Sherief A., Sery, Alaa A., Farag, Hala K.
Zdroj: Journal of Sol-Gel Science & Technology; Apr2023, Vol. 106 Issue 1, p37-43, 7p
Abstrakt: In this paper we report on the sol-gel synthesis of cobalt oxide in four different ionic liquids with two different cations and anions. The employed ionic liquids are; 1-ethyl-3-methylimidazolium trifluoromethylsulfonate ([EMIm]TfO), 1-butyl-1-methylpyrrolidinium trifluoromethylsulfonate ([Py1,4]TfO), 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide ([EMIm]TFSA), and 1-butyl-1-methylpyrrolidiniumbis(trifluoromethylsulfonyl)amide ([Py1,4]TFSA). The influence of the cation and anion of the ionic liquids on the morphology of the synthesized oxides was explored. The results showed that octahydron-shaped Co3O4 nanoparticles with different average sizes depending on the type of the employed ionic liquid. The imidazolium cation was found to play a significant role in reducing the particle size of the synthesized Co3O4 nanoparticles. The samples prepared in the imidazolium-based ionic liquids showed smaller particle sizes than those of the samples prepared in the pyrrolidinium-based ionic liquids. The shape of the particles of the synthesized Co3O4 was not affected by the type of the ionic liquids. Highlights: Co3O4 nanoparticles were obtained in the ionic liquids [EMIm]TfO, [Py1,4]TfO, [EMIm]TFSA and [Py1,4]TFSA via the sol–gel approach. Octahydron-shaped Co3O4 nanoparticles with different average sizes depending on the type of the employed ionic liquid were obtained. The imidazolium cation plays a significant role in reducing the particle size of the synthesized cobalt oxide. The type of the anion or cation of the employed ionic liquids does not show an obvious influence on the shape of the synthesized cobalt oxide particles. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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