TY  - JOUR
A1  - Ayi, Ayi A.
A1  - Khare, Varsha
A1  - Strauch, Peter
A1  - Girard, Jèrôme
A1  - Fromm, Katharina M.
A1  - Taubert, Andreas
T1  - On the chemical synthesis of titanium nanoparticles from ionic liquids
N2  - We report on attempts towards the synthesis of titanium nanoparticles using a wet chemical approach in imidazolium-based ionic liquids (ILs) under reducing conditions. Transmission electron microscopy finds nanoparticles in all cases. UV/Vis spectroscopy confirms the nanoparticulate nature of the precipitate, as in all cases an absorption band between ca. 280 and 300 nm is visible. IR spectroscopy shows that even after extensive washing and drying, some IL remains adsorbed on the nanoparticles. Raman spectroscopy suggests the formation of anatase nanoparticles, but X-ray diffraction reveals that, possibly, amorphous titania forms or that the nanoparticles are so small that a clear structure assignment is not possible. The report thus shows that (possibly amorphous) titanium oxides even form under reducing conditions and that the chemical synthesis of titanium nanoparticles in ILs remains elusive.
Y1  - 2010
UR  - http://www.springerlink.com/content/101572
U6  - https://doi.org/10.1007/s00706-010-0403-4
SN  - 0026-9247
ER  - 
TY  - JOUR
A1  - Khare, Varsha
A1  - Ruby, Christian
A1  - Sonkaria, Sanjiv
T1  - A green and sustainable nanotechnology role of ionic liquids
JF  - International journal of precision engineering and manufacturing
N2  - In the present study, the effects of ionic liquids (ILs) on the stability of nanoparticles in several IL compositions were investigated. In this context, we examined the primary role of ILs in the synthesis of metal/metal oxide nanoparticles and their dispersions extensively. However, the focus of the discussion in this communication centers mainly on the effect of EMIM Ethyl Sulfate on growth and stability of nanoparticles. The dispersion properties of ILs based on their ability to aid the synthesis of uniformly dispersed nanoparticles have been further explored to produce nanoparticles of an effective catalyst useful in water purification, soil remediation and battery applications. Two independent protocols were developed for the synthesis of nanoparticles, namely (a) one pot process via chemical reduction (b) dispersion of the inorganic material in ILs. The protocols are simple, sustainable and environmentally friendly because the processes are conducted in ILs as harmless non-toxic green solvent materials. The catalysts were analyzed by x-ray diffraction, electron microscopy, UV visible spectroscopy and dynamic light scattering as the main methodologies.
KW  - Nanotechnology
KW  - Green synthesis
KW  - Ionic liquid
KW  - Green rust
KW  - Gold nanoparticles
Y1  - 2012
U6  - https://doi.org/10.1007/s12541-012-0160-x
SN  - 2234-7593
VL  - 13
IS  - 7
SP  - 1207
EP  - 1213
PB  - Korean Society of Precision Engineering
CY  - Seoul
ER  -