Obtaining NiHCF Nanoparticles Using a Reverse Micellar System

2010 ◽  
Vol 644 ◽  
pp. 47-50
Author(s):  
Alberto Gutiérrez Becerra ◽  
Tanya Vega Venegas ◽  
Maximiliano Bárcena Soto ◽  
Norberto Casillas ◽  
José Inés Escalante
Keyword(s):  
Particle Size ◽  
Reverse Micelles ◽  
Metallic Nanoparticles ◽  
Reverse Microemulsion ◽  
Ammonium Bromide ◽  
Micellar System ◽  
Nickel Hexacyanoferrate ◽  
Size And Shape ◽  
Reverse Micellar System ◽  
Reverse Micellar

The synthesis of metallic nanoparticles using a reverse microemulsion medium brings controlled size and shape. In this study, reverse micelar system was employed for the synthesis of nickel hexacyanoferrate nanoparticles, NiHCF, by direct encapsulation in the water pools of reverse micelles formed in a pseudoternary system that consist of a mixture of 95 %wt. cetyltrimetyl ammonium bromide (CTAB) and 5 %wt. of a novel modified surfactant cetyltrimetyl ammonium ferrocyanate (CTA[Fe(CN6)]4-, CTAFe)/n-butanol/Hexane/Water. These NiHCF nanoparticles were produced with particle size ranging with 20 – 60 nm.

A reverse micellar system with Triton X-100: effect of surfactant polydispersity and preparation of monodisperse silica nanoparticles

Soft Matter ◽  
2020 ◽  
Vol 16 (2) ◽  
pp. 383-389
Author(s):  
Yaping Zhang ◽  
Bin Zhen ◽  
Yue Hu ◽  
Guohong Liang ◽  
Yaqing Feng
Keyword(s):  
Silica Nanoparticles ◽  
Reverse Micelles ◽  
Micellar System ◽  
Monodisperse Silica ◽  
Reverse Micellar System ◽  
Triton X ◽  
Reverse Micellar

Polydispersity of TX-100 surfactant affects the structure of reverse micelles remarkably, and TX-100 with 5–10 EO units endows the micelles with hierarchical micellar interface, favoring for the preparation of monodisperse silica nanoparticles.

scholarly journals Effect of Key Parameters on Jacalin Extraction from Aqueous Phase into Anionic Reverse Micelles

2019 ◽  
Vol 19 (3) ◽  
pp. 737 ◽  
Author(s):  
Sharifah Fathiyah Sy Mohamad ◽  
Farhan Mohd Said ◽  
Mimi Sakinah Abdul Munaim ◽  
Shahril Mohamad
Keyword(s):  
Aqueous Phase ◽  
Reverse Micelles ◽  
Crude Protein ◽  
Volume Ratio ◽  
Micellar System ◽  
Phase Volume ◽  
Phase Volume Ratio ◽  
Nacl Concentration ◽  
Reverse Micellar System ◽  
Reverse Micellar

This study demonstrates the extraction of jacalin from crude extract of jackfruit seeds using anionic surfactant based reverse micellar system, sodium bis(2-ethylhexyl) sulfosuccinate (AOT) in isooctane. Effects of various parameters, such as, NaCl concentration (0.05 – 1 M), pH of aqueous phase (pH 4 – 10), AOT concentration (5 – 150 mM), contact time (5 – 30 min) and phase volume ratio (0.5-5) on the transfer efficiency of jacalin was evaluated by changing one factor at a time (OFAT) while keeping the other parameters constant. A maximum of 83% of protein transfer was achieved after equal volume of organic and aqueous phase was stirred for 20 min using 20 mM AOT at pH 5 aqueous phase containing 0.1 M NaCl. The findings demonstrated AOT reverse micellar system as a promising and effective method to extract and purify jacalin from crude protein mixture.

The catalytic effect of the sodium dodecyl sulfate–hexanol–water reverse micellar system

1999 ◽  
Vol 9 (3) ◽  
pp. 125-126 ◽  
Author(s):  
Lucia Ya. Zakharova ◽  
Farida G. Valeeva ◽  
Lyudmila A. Kudryavtseva ◽  
Elena P. Zhil’tsova
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Catalytic Effect ◽  
Sodium Dodecyl ◽  
Micellar System ◽  
Dodecyl Sulfate ◽  
Reverse Micellar System ◽  
Reverse Micellar

Kinetics of alkaline hydrolysis of ethylp-nitrophenyl ethylphosphonate in the reverse micellar system: sodium dodecyl sulfate-hexanol-water

2000 ◽  
Vol 49 (2) ◽  
pp. 265-269
Author(s):  
L. Ya. Zakharova ◽  
F. G. Valeeva ◽  
L. A. Kudryavtseva ◽  
V. E. Bel'skii ◽  
E. P. Zhil'tsova ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Alkaline Hydrolysis ◽  
Sodium Dodecyl ◽  
Micellar System ◽  
Dodecyl Sulfate ◽  
Reverse Micellar System ◽  
Kinetics Of ◽  
Hydrolysis Of ◽  
System Sodium ◽  
Reverse Micellar

Characteristics of Nano-capsules Prepared Using Reverse Micellar System

2005 ◽  
Vol 83 (7) ◽  
pp. 861-865 ◽  
Author(s):  
S. Kiyoyama ◽  
K. Shiomori ◽  
Y. Kawano ◽  
H. Yoshizawa ◽  
M. Yoshida ◽  
...  
Keyword(s):  
Micellar System ◽  
Reverse Micellar System ◽  
Reverse Micellar

Preparation of tailor-made supported catalysts using asymmetric flow field flow fractionation and their application in hydrogenation

2014 ◽  
Vol 3 (1) ◽  
pp. 87-98 ◽  
Author(s):  
Jens Baumgard ◽  
Marga-Martina Pohl ◽  
Udo Kragl ◽  
Norbert Steinfeldt
Keyword(s):  
Particle Size ◽  
Flow Field ◽  
Metallic Nanoparticles ◽  
Size Range ◽  
Separation Process ◽  
Proton Nuclear Magnetic Resonance ◽  
Field Flow Fractionation ◽  
Asymmetric Flow ◽  
Size And Shape ◽  
Flow Fractionation

AbstractThe optical, chemical, and catalytic properties of metallic nanoparticles (NPs) depend strongly on their particle size and shape. Therefore, the preparation of monodisperse metallic NPs is very important for fundamental studies and practical applications. However, the isolation of the different structures by separation from a polydisperse sample, especially in the size range below 10 nm, is not well applied so far. Here, the asymmetric flow field flow fractionation (AF4) is adapted for the preparative separation of the Pd NPs regarding their size and shape in the sub-10-nm size range. To prove the efficiency of the applied method, small-angle X-ray scattering (SAXS) and high-resolution transmission electron microscopy (TEM) were utilized to determine the particle size distribution at different stages of the separation process. A major benefit of this method compared to most of the other separation techniques, the removal of impurities during the separation process, was proven by proton nuclear magnetic resonance (NMR). The obtained results demonstrate that the AF4 is well suited for the rapid preparation of the purified uniform precious metal NPs at the applied size range. Single fractions of the different-sized and -shaped Pd NPs were deposited on titania (TiO2) and tested in the catalytic hydrogenation of 2,5 hydroxymethylfurfural (HMF) in aqueous solution under mild conditions. While the spherical-shaped particles show a high activity, the separated agglomerated particles show a higher selectivity to the desired products.

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