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Preparation of hollow ZnO microspheres using poly(methyl methacrylate) as a template with supercritical CO2-ethanol s / Kiyoshi Matsuyama in Industrial & engineering chemistry research, Vol. 49 N° 18 (Septembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 18 (Septembre 2010) . - pp. 8510–8517 Titre : Preparation of hollow ZnO microspheres using poly(methyl methacrylate) as a template with supercritical CO2-ethanol s Type de document : texte imprimé Auteurs : Kiyoshi Matsuyama, Auteur ; Kenji Mishima, Auteur ; Takafumi Kato, Auteur Année de publication : 2010 Article en page(s) : pp. 8510–8517 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Microspheres Résumé : Hollow ZnO microspheres were prepared using poly(methyl methacrylate) (PMMA) as a template with the assistance of supercritical CO2-ethanol solution. A precursor solution of zinc nitrate (Zn(NO3)2·6H2O) was dissolved in supercritical CO2/ethanol mixtures and was impregnated on the surface of the PMMA template. After the removal of the PMMA template by calcination in air, hollow ZnO microspheres were obtained. The products were characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), nitrogen adsorption−desorption experiments, and scanning electronic microscopy (SEM). Furthermore, the effects of experimental conditions, such as the concentration of precursor, calcination temperature, impregnation media, and operating temperature during the depressurization process, on the particle morphology were investigated. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100551t [article] Preparation of hollow ZnO microspheres using poly(methyl methacrylate) as a template with supercritical CO2-ethanol s [texte imprimé] / Kiyoshi Matsuyama, Auteur ; Kenji Mishima, Auteur ; Takafumi Kato, Auteur . - 2010 . - pp. 8510–8517. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 18 (Septembre 2010) . - pp. 8510–8517 Mots-clés : Microspheres Résumé : Hollow ZnO microspheres were prepared using poly(methyl methacrylate) (PMMA) as a template with the assistance of supercritical CO2-ethanol solution. A precursor solution of zinc nitrate (Zn(NO3)2·6H2O) was dissolved in supercritical CO2/ethanol mixtures and was impregnated on the surface of the PMMA template. After the removal of the PMMA template by calcination in air, hollow ZnO microspheres were obtained. The products were characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), nitrogen adsorption−desorption experiments, and scanning electronic microscopy (SEM). Furthermore, the effects of experimental conditions, such as the concentration of precursor, calcination temperature, impregnation media, and operating temperature during the depressurization process, on the particle morphology were investigated. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100551t