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Preparation and characterization of magnetic rectorite / iron oxide nanocomposites and its application for the removal of the dyes / Dongliang Wu in Chemical engineering journal, Vol. 174 N° 1 (Octobre 2011) 

Public ISBD [article]  in Chemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp. 489–494 Titre : Preparation and characterization of magnetic rectorite / iron oxide nanocomposites and its application for the removal of the dyes Type de document : texte imprimé Auteurs : Dongliang Wu, Auteur ; Pengwu Zheng, Auteur ; Peter R. Chang, Auteur Année de publication : 2012 Article en page(s) : pp. 489–494 Note générale : Génie chimique Langues : Anglais (eng) Mots-clés : Adsorption  Dye  Fe3O4  Rectorite Résumé : The superparamagnetic Fe3O4 nanoparticles were synthesized on the rectorite (REC) to prepare the adsorbent of magnetic REC (REC-Fe3O4), which was explored to adsorb three dyes, namely methylene blue (MB), neutral red (NR) and methyl orange (MO). Characterization of REC-Fe3O4 by Fourier transform infrared spectroscopy, transmission electron microscopy and X-ray diffraction showed that REC was attached with clusters of Fe3O4 nanoparticles. And the galleries in the REC were partially exfoliated when Fe3O4 were formed on the new surface of REC. There were still some galleries, which were not exfoliated in REC-Fe3O4. Magnetic properties revealed that REC-Fe3O4 was superparamagnetic with a saturation magnetization (19.14 emu/g). The adsorption behavior of REC and REC-Fe3O4 illustrated that it exhibited good adsorption for MB and NR, while the adsorption of MO was very little. And REC-Fe3O4 was easily separated from the aqueous solution in a magnetic field. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S1385894711010874 [article] Preparation and characterization of magnetic rectorite / iron oxide nanocomposites and its application for the removal of the dyes [texte imprimé] / Dongliang Wu, Auteur ; Pengwu Zheng, Auteur ; Peter R. Chang, Auteur . - 2012 . - pp. 489–494. Génie chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp. 489–494 Mots-clés : Adsorption  Dye  Fe3O4  Rectorite Résumé : The superparamagnetic Fe3O4 nanoparticles were synthesized on the rectorite (REC) to prepare the adsorbent of magnetic REC (REC-Fe3O4), which was explored to adsorb three dyes, namely methylene blue (MB), neutral red (NR) and methyl orange (MO). Characterization of REC-Fe3O4 by Fourier transform infrared spectroscopy, transmission electron microscopy and X-ray diffraction showed that REC was attached with clusters of Fe3O4 nanoparticles. And the galleries in the REC were partially exfoliated when Fe3O4 were formed on the new surface of REC. There were still some galleries, which were not exfoliated in REC-Fe3O4. Magnetic properties revealed that REC-Fe3O4 was superparamagnetic with a saturation magnetization (19.14 emu/g). The adsorption behavior of REC and REC-Fe3O4 illustrated that it exhibited good adsorption for MB and NR, while the adsorption of MO was very little. And REC-Fe3O4 was easily separated from the aqueous solution in a magnetic field. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S1385894711010874

Preparation and characterization of plasticized starch / carbon black - oxide nanocomposites / Dayan Qian in Industrial & engineering chemistry research, Vol. 51 N° 23 (Juin 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 7941–7947 Titre : Preparation and characterization of plasticized starch / carbon black - oxide nanocomposites Type de document : texte imprimé Auteurs : Dayan Qian, Auteur ; Peter R. Chang, Auteur ; Pengwu Zheng, Auteur Année de publication : 2012 Article en page(s) : pp. 7941–7947 Note générale : Industrial chemistry Langues : Anglais (eng) Résumé : The carbon black-oxide (CBO) particles were prepared by oxidizing carbon black (CB) in a modified Hummer’s method to improve the dispersion of CBO in water. The carboxylic acid, epoxide groups, and hydroxyl groups were formed in the resulting golden CBO particles, which in the size of about 30–50 nm were smaller than CB particles. And the dispersion of CBO particles was so good in distilled water that CBO particles in aqueous solution followed the Lambert–Beer’s law well. The nanocomposites were also prepared using CBO or CB particles as the fillers in glycerol-plasticized starch (GPS) matrix by the casting process. CBO fillers had good dispersion in GPS matrix and exhibited an obvious reinforcing effect. Both tensile strength and Youngs modulous of GPS/CBO composites were higher than GPS/CB composites. In views of the values of water vapor permeability (WVP), GPS/CBO composites exhibited better water resistance than GPS/CB composites. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3001666 [article] Preparation and characterization of plasticized starch / carbon black - oxide nanocomposites [texte imprimé] / Dayan Qian, Auteur ; Peter R. Chang, Auteur ; Pengwu Zheng, Auteur . - 2012 . - pp. 7941–7947. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 7941–7947 Résumé : The carbon black-oxide (CBO) particles were prepared by oxidizing carbon black (CB) in a modified Hummer’s method to improve the dispersion of CBO in water. The carboxylic acid, epoxide groups, and hydroxyl groups were formed in the resulting golden CBO particles, which in the size of about 30–50 nm were smaller than CB particles. And the dispersion of CBO particles was so good in distilled water that CBO particles in aqueous solution followed the Lambert–Beer’s law well. The nanocomposites were also prepared using CBO or CB particles as the fillers in glycerol-plasticized starch (GPS) matrix by the casting process. CBO fillers had good dispersion in GPS matrix and exhibited an obvious reinforcing effect. Both tensile strength and Youngs modulous of GPS/CBO composites were higher than GPS/CB composites. In views of the values of water vapor permeability (WVP), GPS/CBO composites exhibited better water resistance than GPS/CB composites. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3001666