| Titre : | Preparation of magnetically separable mesoporous silica microspheres with open pore systems in supercritical carbon dioxide (2009) |
| Auteurs : | Zhimin Chen, Auteur ; Mingchuan Zhuo, Auteur ; Fengfeng Xue, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 48 N° 7, Avril 2009) |
| Article en page(s) : | pp. 3441–3445 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | 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 |
