Preparation and properties of titania based ionogels synthesized using ionic liquid 1-ethyl-3-methyl imidazolium thiocyanate

[Display omitted] •Synthesis of titania based ionogels using non-aqueous sol-gel process.•Ionogels are found to be mesoporous structure with uniform pore size distribution.•Ionic liquid extracted TiO2 matrix reveals the anatase phase of TiO2.•Properties of ionic liquid are found to change in TiO2 ma...

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Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2017-06, Vol.220, p.37-43
Main Authors: Verma, Y.L., Tripathi, A.K., Shalu, Singh, V.K., Balo, L., Gupta, H., Singh, S.K., Singh, R.K.
Format: Article
Language:English
Subjects:
Adsorption
Anatase
Crystal structure
Desorption
Electrolytes
Glass transition temperature
Ionic liquid
Ionic liquids
Ionogels
Mesoporous
Particle size distribution
Photomicrographs
Pore size
Pore size distribution
Porosity
Sol-gel processes
Thermal stability
Titania
Titanium
Titanium oxides
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Summary:[Display omitted] •Synthesis of titania based ionogels using non-aqueous sol-gel process.•Ionogels are found to be mesoporous structure with uniform pore size distribution.•Ionic liquid extracted TiO2 matrix reveals the anatase phase of TiO2.•Properties of ionic liquid are found to change in TiO2 matrix. Present study reports the synthesis of titania (TiO2) based ionogels using ionic liquid (IL) 1-ethyl-3-methyl imidazolium thiocyanate ([EMIM][SCN]) by non-aqueous sol-gel process. Ionogels are characterized using N2 adsorption-desorption, TGA, DSC, SEM, TEM, XRD, and FTIR. N2-sorption results show that TiO2 matrices have meso-pores with uniform pore size distribution. Thermal studies reveal that thermal stability of confined IL decreases while the glass transition temperature (Tg) is found to increase. XRD patterns show that IL containing TiO2 matrices exhibit amorphous (weak crystalline peaks) nature however after extraction of IL from ionogel, it shows the crystalline (anatase) phase of TiO2 which has also been found from SAED pattern. SEM micrographs reveal that as the amount of IL is increased, TiO2 particles are found to agglomerate. FTIR results indicate that the vibrational frequencies of confined IL are found to shift due to interaction of IL molecules with titania pore wall surface.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2017.03.010