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Synthesis of optically active ZnS – carbon nanotube nanocomposites in supercritical carbon dioxide via a single source diethyldithiocarbamate precursor / Michael J. Casciato in Industrial & engineering chemistry research, Vol. 51 N° 36 (Septembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 36 (Septembre 2012) . - pp. 11710-11716 Titre : Synthesis of optically active ZnS – carbon nanotube nanocomposites in supercritical carbon dioxide via a single source diethyldithiocarbamate precursor Type de document : texte imprimé Auteurs : Michael J. Casciato, Auteur ; Galit Levitin, Auteur ; Dennis W. Hess, Auteur Année de publication : 2012 Article en page(s) : pp. 11710-11716 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Precursor  Supercritical  state  Carbon  dioxide  Nanocomposite Résumé : Zinc sulfide nanoparticles (ZnS NPs) have been deposited on carbon nanotubes (CNTs) from a single source precursor, zinc(II) bis(diethyldithiocarbamate), using a one-step batch supercritical carbon dioxide (sc-CO2) process. By eliminating the need for an additional sulfur source while simultaneously employing CO2 as the solvent, this method replaces environmentally unfriendly chemicals commonly used in ZnS―CNT nanocomposite synthesis such as ethylene glycol, thiourea, and hydrogen sulfide. ZnS NP morphology displayed large clusters (209 ± 24 nm) that were comprised of smaller particles (16.9 ± 1.9 nm). Photoluminescence spectroscopy demonstrated broad band fluorescence of the ZnS―CNT nanocomposite at 440 nm (2.82 eV) and fluorescence of a Mn doped ZnS-CNT nanocomposite at 445 nm (2.79 eV) and 602 nm (2.07 eV), also in agreement with previous studies. The ZnS―CNT nanocomposite was compared to ZnS NPs synthesized in the absence of a substrate; results indicated that the ZnS―CNT nanocomposite was formed by a heterogeneous reaction mechanism in the sc-CO2 system. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26350339 [article] Synthesis of optically active ZnS – carbon nanotube nanocomposites in supercritical carbon dioxide via a single source diethyldithiocarbamate precursor [texte imprimé] / Michael J. Casciato, Auteur ; Galit Levitin, Auteur ; Dennis W. Hess, Auteur . - 2012 . - pp. 11710-11716. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 36 (Septembre 2012) . - pp. 11710-11716 Mots-clés : Precursor  Supercritical  state  Carbon  dioxide  Nanocomposite Résumé : Zinc sulfide nanoparticles (ZnS NPs) have been deposited on carbon nanotubes (CNTs) from a single source precursor, zinc(II) bis(diethyldithiocarbamate), using a one-step batch supercritical carbon dioxide (sc-CO2) process. By eliminating the need for an additional sulfur source while simultaneously employing CO2 as the solvent, this method replaces environmentally unfriendly chemicals commonly used in ZnS―CNT nanocomposite synthesis such as ethylene glycol, thiourea, and hydrogen sulfide. ZnS NP morphology displayed large clusters (209 ± 24 nm) that were comprised of smaller particles (16.9 ± 1.9 nm). Photoluminescence spectroscopy demonstrated broad band fluorescence of the ZnS―CNT nanocomposite at 440 nm (2.82 eV) and fluorescence of a Mn doped ZnS-CNT nanocomposite at 445 nm (2.79 eV) and 602 nm (2.07 eV), also in agreement with previous studies. The ZnS―CNT nanocomposite was compared to ZnS NPs synthesized in the absence of a substrate; results indicated that the ZnS―CNT nanocomposite was formed by a heterogeneous reaction mechanism in the sc-CO2 system. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26350339