Structural, dielectric and conductivity behaviours of cetyltrimethylammonium bromide/ethylene glycol-based quenched lyotropic mesophases

2017 ◽  
Vol 45 (3) ◽  
pp. 381-387 ◽  
Author(s):  
Ravi K. Shukla ◽  
K. K. Raina
Keyword(s):  
Ethylene Glycol ◽  
Cetyltrimethylammonium Bromide ◽  
Lyotropic Mesophases

Cetyltrimethylammonium bromide- and ethylene glycol-assisted preparation of mono-dispersed indium oxide nanoparticles using hydrothermal method

2014 ◽  
Vol 68 (8) ◽  
Author(s):  
Selvakumar Dhanasingh ◽  
Dharmaraj Nallasamy ◽  
Saravanan Padmanapan ◽  
Vinod Padaki
Keyword(s):  
Ethylene Glycol ◽  
Hydrothermal Method ◽  
Indium Oxide ◽  
Cetyltrimethylammonium Bromide ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
Hydrothermal Conditions ◽  
X Ray ◽  
Transmission Electron ◽  
Diffraction Patterns

AbstractThe influence of cetyltrimethylammonium bromide and ethylene glycol on the size and dispersion of indium oxide nanoparticles prepared under hydrothermal conditions was investigated. The precursor compound, indium hydroxide, obtained by the hydrothermal method in the absence as well as the presence of cetyltrimethylammonium bromide, was converted to indium oxide by sintering at 400°C. The formation of nanoscale indium oxide upon sintering was ascertained by the characteristic infrared adsorption bands and X-ray diffraction patterns of indium oxide. Transmission electron microscopy and band gap values confirmed that the cetyltrimethylammonium bromide facilitated the formation of indium oxide nanoparticles smaller in size and narrower in distribution than those prepared without the assistance of cetyltrimethylammonium bromide.

Mixed micelles of cetyltrimethylammonium bromide and poly(ethylene glycol)-600 monolaurate as catalysts of polyethylenimine phosphorylation in chloroform

2006 ◽  
Vol 55 (8) ◽  
pp. 1411-1418 ◽  
Author(s):  
G. A. Gainanova ◽  
E. P. Zhil’tsova ◽  
L. A. Kudryavtseva ◽  
S. V. Kharlamov ◽  
Sh. K. Latypov ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Cetyltrimethylammonium Bromide ◽  
Mixed Micelles ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

scholarly journals Effect of Micellar Aggregate on the Kinetics and Mechanism of the Reaction between Ethylene Glycol and Periodate

2014 ◽  
Vol 2014 ◽  
pp. 1-3
Author(s):  
Olaseni Segun Esan
Keyword(s):  
Ethylene Glycol ◽  
Cetyltrimethylammonium Bromide ◽  
Reaction Rate ◽  
The Other ◽  
Bulk Solution ◽  
Kinetic Behavior ◽  
Pseudophase Model ◽  
Micellar Aggregates ◽  
Vis Spectroscopy ◽  
Mechanism Of The Reaction

The oxidation of ethylene glycol by periodate (IO4-) was studied in different micellar aggregates of cetyltrimethylammonium bromide (CTABr) and dodecylamine (DA) by means of UV/Vis spectroscopy. The observed constant Ko was obtained by monitoring the disappearing of ethylene glycol with time at a suitable wavelength under pseudofirst condition. Addition of CTABr and DA inhibits the reaction rate while the kinetic behavior was explained on the association of one of the reactants with the micelles leaving the other reactant in the bulk solution (pseudophase model).

Template Assisted Ultrasonic Process Synthesis and Luminescent Properties of Eu3+ Doped LaPO4 Nanocrystals

2010 ◽  
Vol 148-149 ◽  
pp. 938-942
Author(s):  
Yan Bo Wu ◽  
Peng Sun ◽  
Hong Quan Yu ◽  
Si Si Zeng
Keyword(s):  
Ethylene Glycol ◽  
Cetyltrimethylammonium Bromide ◽  
Luminescent Properties ◽  
Hexagonal Structure ◽  
Process Synthesis ◽  
Poly Ethylene Glycol ◽  
Ultrasonic Time ◽  
Ultrasonic Process ◽  
Poly Ethylene ◽  
Poly Propylene

Polyvinglpyrrolidone (PVP), cetyltrimethylammonium bromide (CTAB), and poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (P123) were used as templates, respectively. The morphology, structure and luminescent properties of the products were characterized and studied. The results show that all the products are pure LaPO4 with hexagonal structure. Comparing with the morphologies of LaPO4:Eu3+ nanocrystals prepared with PVP and CTAB as templates, the LaPO4:Eu3+ nanocrystals with P123 as template present regular spherical structure. The sizes of all products are in the range of 50–120 nm. When ultrasonic time was 2 h, the tendency, intensity and stability of fluorescent irradiation is obviously difference with different templates. In addition, the luminescent intensity of the LaPO4:Eu3+ nanocrystals using PVP as template is the strongest and using P123 as template is the weakest. All above results indicate that the template kinds have played an important role in the morphology and luminescent properties of the LaPO4:Eu3+ nanocrystals.

Effects of solvents and Sb sources on the morphologies of LaFe3CoSb12 nanopowders made by the hydro/solvo thermal method

2009 ◽  
Vol 24 (9) ◽  
pp. 2873-2879 ◽  
Author(s):  
Pengxian Lu ◽  
Zigang Shen ◽  
Xing Hu
Keyword(s):  
Aqueous Solution ◽  
Ethylene Glycol ◽  
Cetyltrimethylammonium Bromide ◽  
Disodium Salt ◽  
The Other ◽  
Thermal Method ◽  
Water As Solvent

The thermoelectric LaFe3CoSb12 nanopowders were synthesized by the hydro/solvo thermal method. The effects of different solvents were investigated by using only the potassium antimony tartrate as Sb source. Also, the effects of the different Sb sources were investigated by using only water as solvent on the morphologies of the resulting nanopowders. The results show that a mixture of nanoparticles and nanorods can be obtained in aqueous solution of cetyltrimethylammonium bromide or ethylenediamine-tetra-acetic disodium salt. In ethylenediamine only nanorods can be obtained, and in ethylene glycol only nanoparticles can be obtained. The other morphologies of the LaFe3CoSb12, such as particle-like, nest-shaped, branch-shaped, or feather-like crystalline, can be synthesized in water by selecting a suitable Sb source.

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