A cyclic voltammetric technique for the detection of micro-regions of bmimPF6/Tween 20/H₂O microemulsions and their performance characterization by UV-Visspectroscopy

Nonaqueous ionic liquid microemulsions of 1-butyl-3-methylimidazolium tetrafluoroborate, toluene and ethanol

“…18 < f T < 38% for R E/IL ), the relatively dramatic change of D P indicates that the microstructure of the microemulsion is different from the droplet structures of the microemulsions. According to the principle of distinguishing subregions in microemulsions using the apparent diffusion coefficient, 23,27,34 this result suggests that a BC microstructure, in which bmimBF 4 and immiscible toluene are both local continuous phases, is formed.…”

“…As the polarity of the droplet domains increases, l max of MO shis to longer wavelengths (red shi). 17,18,27 Fig. 9 shows UVvis absorption spectra at different volume fractions of bmimBF 4 …”

“…To obtain better insight into SFMEs, their microstructures and structural transitions must be investigated. Techniques used to identify microstructures and structural transitions include cyclic voltammetry (CV), [19][20][21][22][23][24][25][26][27] pulse eld gradient spin-echo nuclear magnetic resonance (PGSE NMR), [28][29][30][31] electrical conductivity (EC), [32][33][34][35] dynamic light scattering (DLS) 31,36 and rheology.…”

“…This indicates that electron transport of the electrode reaction in the microemulsions is diffusion controlled. 20,27 Thus, Fc is a suitable electrochemical probe for studying the microstructures and structural transitions of the nonaqueous IL SFMEs. Changes in D P in the microemulsions were examined along various toluene dilution lines for R E/IL values of 7, 3, 1.67, 1, 0.6, 0.33 and 0.143.…”

Layer-by-layer encapsulated nano-emulsion of ionic liquid loaded with functional material for extraction of Cd2+ ions from aqueous solutions

“…These emulsions therefore must be stable enough for prolonged storage to be available to use on demand. Several methods of stabilisation of ionic liquid nano-and microemulsions have been reported including micro-gel [10], ionic [23] and non-ionic surfactant stabilization methods [24][25][26]. Emulsions fabricated using the aforementioned methods have been reported to be stable, but it is unclear how stable they will be if used for extraction purposes.…”