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Crystallography facet-dependent antibacterial activity / Jia Ren in Industrial & engineering chemistry research, Vol. 50 N° 17 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 10366-10369 Titre : Crystallography facet-dependent antibacterial activity : the case of Cu2O Type de document : texte imprimé Auteurs : Jia Ren, Auteur ; Wenzhong Wang, Auteur ; Songmei Sun, Auteur Année de publication : 2011 Article en page(s) : pp. 10366-10369 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Crystallography Résumé : The dependence of antibacterial activities on different crystallography facets has been demonstrated by taking Cu2O crystals as an example. Owing to the different atomic arrangement of the exposed surfaces, Cu2O octahedral crystals bounded by {111} facets exhibited higher activity in killing E. coli than cubic ones bounded by {100} facets. Zeta potential measurement demonstrated that the electrostatic interaction between E. coli and octahedral crystals was more profitable in inactivating bacteria than that between E. coli and cubic ones. Moreover, the suspending medium, where the bactericidal process takes place, has been found to play a crucial role on the bactericidal efficiency. This work presents a way for the sterilization or killing of bacteria efficiently and selectively. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2005466 [article] Crystallography facet-dependent antibacterial activity : the case of Cu2O [texte imprimé] / Jia Ren, Auteur ; Wenzhong Wang, Auteur ; Songmei Sun, Auteur . - 2011 . - pp. 10366-10369. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 10366-10369 Mots-clés : Crystallography Résumé : The dependence of antibacterial activities on different crystallography facets has been demonstrated by taking Cu2O crystals as an example. Owing to the different atomic arrangement of the exposed surfaces, Cu2O octahedral crystals bounded by {111} facets exhibited higher activity in killing E. coli than cubic ones bounded by {100} facets. Zeta potential measurement demonstrated that the electrostatic interaction between E. coli and octahedral crystals was more profitable in inactivating bacteria than that between E. coli and cubic ones. Moreover, the suspending medium, where the bactericidal process takes place, has been found to play a crucial role on the bactericidal efficiency. This work presents a way for the sterilization or killing of bacteria efficiently and selectively. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2005466

Efficient methylene blue removal over hydrothermally synthesized starlike BiVO4 / Songmei Sun in Industrial & engineering chemistry research, Vol. 48 N°4 (Février 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - pp. 1735–1739 Titre : Efficient methylene blue removal over hydrothermally synthesized starlike BiVO4 Type de document : texte imprimé Auteurs : Songmei Sun, Auteur ; Wenzhong Wang, Auteur ; Lin Zhou, Auteur Année de publication : 2009 Article en page(s) : pp. 1735–1739 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Starlike  BiVO4  Water/ethanol  mixture  Ethylenediamine  tetraacetic  acid Résumé : Nanoplate-stacked starlike BiVO4 products have been successfully synthesized by a hydrothermal method, where a water/ethanol mixture was the solvent and ethylenediamine tetraacetic acid (EDTA) was the chelating agent. The molar ratio of EDTA to Bi3+ was found to play an important role in the formation of this morphology. These starlike BiVO4 samples exhibited a high visible-light-driven photocatalytic efficiency. For the degradation of methylene blue (MB) under visible-light irradiation (λ > 420 nm), about 91% of the MB was degraded within 25 min. This is much higher than for BiVO4 samples prepared by solid-state reaction (bulk BiVO4) and other hydrothermal synthesis methods. The reasons for the differences in the photocatalytic activities of these BiVO4 samples were further investigated. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801516u [article] Efficient methylene blue removal over hydrothermally synthesized starlike BiVO4 [texte imprimé] / Songmei Sun, Auteur ; Wenzhong Wang, Auteur ; Lin Zhou, Auteur . - 2009 . - pp. 1735–1739. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - pp. 1735–1739 Mots-clés : Starlike  BiVO4  Water/ethanol  mixture  Ethylenediamine  tetraacetic  acid Résumé : Nanoplate-stacked starlike BiVO4 products have been successfully synthesized by a hydrothermal method, where a water/ethanol mixture was the solvent and ethylenediamine tetraacetic acid (EDTA) was the chelating agent. The molar ratio of EDTA to Bi3+ was found to play an important role in the formation of this morphology. These starlike BiVO4 samples exhibited a high visible-light-driven photocatalytic efficiency. For the degradation of methylene blue (MB) under visible-light irradiation (λ > 420 nm), about 91% of the MB was degraded within 25 min. This is much higher than for BiVO4 samples prepared by solid-state reaction (bulk BiVO4) and other hydrothermal synthesis methods. The reasons for the differences in the photocatalytic activities of these BiVO4 samples were further investigated. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801516u