Formation of ruthenium nanoparticles by the mixing of two reactive microemulsions / Sachin U. Nandanwar in Industrial & engineering chemistry research, Vol. 50 N° 19 (Octobre 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 11445-11451 Titre : Formation of ruthenium nanoparticles by the mixing of two reactive microemulsions Type de document : texte imprimé Auteurs : Sachin U. Nandanwar, Auteur ; Mousumi Chakraborty, Auteur ; Z. V. P. Murthy, Auteur Année de publication : 2011 Article en page(s) : pp. 11445-11451 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Microemulsion Mixing Nanoparticle Résumé : In this study, two reactants (ruthenium chloride and sodium borohydrate) were premicellized in two separate microemulsions and brought into contact through intermicellar exchange to conduct the reaction. As a result, ruthenium nanoparticles were formed. The overall reaction rate was governed by the intermicellar exchange rate. Particle size was controlled by varying surfactant concentration, water-to-surfactant molar ratio (ω), precursor (ruthenium chloride) concentration, and molar ratio of reducing agent-to-reagent (R). Dynamic light scattering and transmission electron microscopy were used to determine the size, size distribution, and structure of the synthesized ruthenium nanoparticles. The molar ratio ω was varied from 3 to 7; sizes of the particles were found to be in the range of 17.08―25.09 nm. The precursor (ruthenium chloride) concentration was varied in the range of 0.1―0.3 M; particle size was observed to decrease up to 0.2 M then increase due to particle agglomeration at higher precursor concentrations. Smaller nanoparticles were obtained at higher R values due to faster intramicellar nucleation and growth rate. Dispersion destabilization of colloidal ruthenium nanoparticles was detected by Turbiscan. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24573341 [article] Formation of ruthenium nanoparticles by the mixing of two reactive microemulsions [texte imprimé] / Sachin U. Nandanwar, Auteur ; Mousumi Chakraborty, Auteur ; Z. V. P. Murthy, Auteur . - 2011 . - pp. 11445-11451. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 11445-11451 Mots-clés : Microemulsion Mixing Nanoparticle Résumé : In this study, two reactants (ruthenium chloride and sodium borohydrate) were premicellized in two separate microemulsions and brought into contact through intermicellar exchange to conduct the reaction. As a result, ruthenium nanoparticles were formed. The overall reaction rate was governed by the intermicellar exchange rate. Particle size was controlled by varying surfactant concentration, water-to-surfactant molar ratio (ω), precursor (ruthenium chloride) concentration, and molar ratio of reducing agent-to-reagent (R). Dynamic light scattering and transmission electron microscopy were used to determine the size, size distribution, and structure of the synthesized ruthenium nanoparticles. The molar ratio ω was varied from 3 to 7; sizes of the particles were found to be in the range of 17.08―25.09 nm. The precursor (ruthenium chloride) concentration was varied in the range of 0.1―0.3 M; particle size was observed to decrease up to 0.2 M then increase due to particle agglomeration at higher precursor concentrations. Smaller nanoparticles were obtained at higher R values due to faster intramicellar nucleation and growth rate. Dispersion destabilization of colloidal ruthenium nanoparticles was detected by Turbiscan. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24573341

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