During the last decade, the chemistry of ionic liquids has garnered spectacular interest from the scientific community. Currently, however, only a few of Algerian laboratories are working on these compounds, most of them using conventional methods.

The present research work aims to determine and understanding the structural, spectroscopic and thermal properties of new functionalized activated carbon (FACILs) by ionic liquids (ILs), the structure of incorporated ionic liquids based on mono (IL) and dicationic (DILs) imidazolium cation and containing bromide, hexafluorophosphate, and bis[(trifluoromethyl)sulfonyl]imide as anions. Firstly; the obtained ionic liquids is characterized by ¹H-NMR, ¹³C-NMR, ¹⁹F, ³¹P-NMR and FT-IR spectroscopy.

In order to confirm the insertion of these mono and dicationic ILs on the pore structure and surface chemistry of functionalized activated carbons (FACILs), their structures have been characterized using X-ray diffraction (XRD) analysis, the results indicate that the obtained functionalized activated carbons are disordered and leads to orientation of the crystalline planes.

In the second stage and for a better understanding of their thermal proprieties, the subsequent decomposition and degradation process of produced activated carbons were investigated. Moreover, vibrational spectroscopy studies were conducted by infrared (IR), Raman (FT-Raman) spectroscopy. Hence, the mechanism of interaction between ionic liquids and activated carbon has been discussed in detail.

These results seem to be promising regarding to the potential application of these modified materials as adsorbents or for the melt processing.

KEYWORDS: ionic liquids, functionalized activated carbons; vibrational spectra; thermal stability; XDR measurements.

References

[1]Haddad, B et al, Applied Sciences, 8(7), (2018) 1043.

[2]Haddad, B et al, Journal of Molecular Liquids, 260, (2018) 391-402.

[3]Haddad, B et al, Journal of Molecular Structure, 1146, (2017) 203-212.

[4]Haddad, B et al, Journal of Molecular Structure, 1134, (2017) 582-590.