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Preparation of magnetically separable mesoporous silica microspheres with open pore systems in supercritical carbon dioxide / Zhimin Chen in Industrial & engineering chemistry research, Vol. 48 N° 7 (Avril 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3441–3445 Titre : Preparation of magnetically separable mesoporous silica microspheres with open pore systems in supercritical carbon dioxide Type de document : texte imprimé Auteurs : Zhimin Chen, Auteur ; Mingchuan Zhuo, Auteur ; Fengfeng Xue, Auteur Année de publication : 2009 Article en page(s) : pp. 3441–3445 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Silica  microspheres  Magnetically  separable  mesoporous  Carbon  dioxide Résumé : Magnetically separable mesoporous silica microspheres with open pore systems have been synthesized in supercritical carbon dioxide (SC-CO2). In the experiments, using the excellent transport properties of supercritical carbon dioxide, an acetone solution containing iron(III) acetylacetonate [Fe(acac)3] was easily infiltrated into the mesopores of the microspheres. After thermal decomposition, the Fe(acac)3 was easily transformed into Fe3O4 nanoparticles. A comparison experiment verified that the carrying effect of Fe(acac)3 using SC-CO2 was better than that observed for the common method. The magnetic microspheres were characterized by transmission electron microscopy, energy-dispersive X-ray analysis (EDAX), powder X-ray diffraction, and nitrogen adsorption−desorption. The magnetically separable property of the microspheres was also tested. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801557y [article] Preparation of magnetically separable mesoporous silica microspheres with open pore systems in supercritical carbon dioxide [texte imprimé] / Zhimin Chen, Auteur ; Mingchuan Zhuo, Auteur ; Fengfeng Xue, Auteur . - 2009 . - pp. 3441–3445. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3441–3445 Mots-clés : Silica  microspheres  Magnetically  separable  mesoporous  Carbon  dioxide Résumé : Magnetically separable mesoporous silica microspheres with open pore systems have been synthesized in supercritical carbon dioxide (SC-CO2). In the experiments, using the excellent transport properties of supercritical carbon dioxide, an acetone solution containing iron(III) acetylacetonate [Fe(acac)3] was easily infiltrated into the mesopores of the microspheres. After thermal decomposition, the Fe(acac)3 was easily transformed into Fe3O4 nanoparticles. A comparison experiment verified that the carrying effect of Fe(acac)3 using SC-CO2 was better than that observed for the common method. The magnetic microspheres were characterized by transmission electron microscopy, energy-dispersive X-ray analysis (EDAX), powder X-ray diffraction, and nitrogen adsorption−desorption. The magnetically separable property of the microspheres was also tested. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801557y