Dispersion of phosphonic acids surface - modified titania nanocrystals in various organic solvents / Toshihiko Arita in Industrial & engineering chemistry research, Vol. 49 N° 20 (Octobre 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 20 (Octobre 2010) . - pp. 9815-9821 Titre : Dispersion of phosphonic acids surface - modified titania nanocrystals in various organic solvents Type de document : texte imprimé Auteurs : Toshihiko Arita, Auteur ; Ken-ichi Moriya, Auteur ; Tomoka Yoshimura, Auteur Année de publication : 2011 Article en page(s) : pp. 9815-9821 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Organic solvent Nanocrystal Dispersion Résumé : Titanium dioxide (TiO2, anatase) nanocyrstals tha can be transparently (perfectly) dispersed in several organic solvents were synthesized by organic-ligand-assisted hydrothermal synthesis. To analyze the dispersion behavior of surface-modified nanocrystals from the surface of the surface-modified nanocrystals, three types of surface-modified TiO2 nanocrystals were prepared. Depending on the surface nature of the surface-modified TiO2 nanocrystals, the nanocrystals showed different dispersion behaviors in organic solvents. In particular, the dispersion of surface-modified TiO2 nanocrystals with carboxylic acid terminated surface modifier (TiO2-COOH) varied strongly with changing solvent species. We investigated the dispersity of TiO2-COOH in typical organic solvents using dynamic light scattering (DLS) measurements. One of the three-dimensional solubility parameters, namely, the Hansen solubility parameter, provided detailed information on the mechanism of the dispersion of TiO2-COOH. Because of the carboxylic acid groups exhibited on the surface of the titania nanocrystals, the dispersion of TiO2-COOH was very much affected by the hydrogen-bonding ability of the solvent. The hydrogen-donating/-accepting ability adequately described the dispersion of TiO2-COOH in organic solvents. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23325803 [article] Dispersion of phosphonic acids surface - modified titania nanocrystals in various organic solvents [texte imprimé] / Toshihiko Arita, Auteur ; Ken-ichi Moriya, Auteur ; Tomoka Yoshimura, Auteur . - 2011 . - pp. 9815-9821. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 20 (Octobre 2010) . - pp. 9815-9821 Mots-clés : Organic solvent Nanocrystal Dispersion Résumé : Titanium dioxide (TiO2, anatase) nanocyrstals tha can be transparently (perfectly) dispersed in several organic solvents were synthesized by organic-ligand-assisted hydrothermal synthesis. To analyze the dispersion behavior of surface-modified nanocrystals from the surface of the surface-modified nanocrystals, three types of surface-modified TiO2 nanocrystals were prepared. Depending on the surface nature of the surface-modified TiO2 nanocrystals, the nanocrystals showed different dispersion behaviors in organic solvents. In particular, the dispersion of surface-modified TiO2 nanocrystals with carboxylic acid terminated surface modifier (TiO2-COOH) varied strongly with changing solvent species. We investigated the dispersity of TiO2-COOH in typical organic solvents using dynamic light scattering (DLS) measurements. One of the three-dimensional solubility parameters, namely, the Hansen solubility parameter, provided detailed information on the mechanism of the dispersion of TiO2-COOH. Because of the carboxylic acid groups exhibited on the surface of the titania nanocrystals, the dispersion of TiO2-COOH was very much affected by the hydrogen-bonding ability of the solvent. The hydrogen-donating/-accepting ability adequately described the dispersion of TiO2-COOH in organic solvents. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23325803

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