Vanadium-Substituted Polyoxometalate Ionic Liquid Hybrids: Effect of Alkyl Chain on Dye Removal

Vanadium substituted polyoxometalate ionic liquids (POM-ILs) with increase in alkyl chain lengths, C(4)MImPV(3)W(9)O(40), C(8)MImPV(3)W(9)O(40), and C(16)MImPV(3)W(9)O(40) were prepared by simple ion exchange method. These materials were characterized by elemental analysis, FTIR, electron microscopy, and thermal analysis. The dye removal ability towards methylene blue and methyl orange was studied under neutral pH. The dye removal rate of C(4)MImPV(3)W(9)O(40) and C(8)MImPV(3)W(9)O(40) towards methylene blue was 95%. The dye removal rate of C(16)MImPV(3)W(9)O(40) towards methyl orange was 92%.