Enhanced photocatalytic activity of ag3VO4 loaded with rare-earth elements under visible-light irradiation / Hui Xu in Industrial & engineering chemistry research, Vol. 48 N° 24 (Décembre 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 24 (Décembre 2009) . - pp. 10771–10778 Titre : Enhanced photocatalytic activity of ag3VO4 loaded with rare-earth elements under visible-light irradiation Type de document : texte imprimé Auteurs : Hui Xu, Auteur ; Huaming Li, Auteur ; Xu, Li, Auteur Année de publication : 2010 Article en page(s) : pp. 10771–10778 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Enhanced--Photocatalytic--Activity--Ag3VO4--Loaded--Rare-Earth Elements--under--Visible-Light--Irradiation Résumé : Rare-earth-loaded Ag3VO4 catalysts (RE3+-Ag3VO4, RE = Nd, Sm, and Eu) were prepared by the wetness impregnation technique and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), diffuse reflectance spectroscopy (DRS), and X-ray photoelectron spectroscopy (XPS). The photocatalytic activities of the samples were evaluated by rhodamine B (RhB) dye degradation under visible-light irradiation. It was found that the presence of rare-earth oxides in the host Ag3VO4 could decrease the band gap and accelerate the separation of photogenerated electron−hole pairs, which led to higher photocatalytic activities. Among the rare-earth-loaded samples, Nd3+-loaded Ag3VO4 catalyst showed the highest photocatalytic activity. The optimum contents of Nd3+, Eu3+, and Sm3+ were found to be 2, 3, and 2 wt %, respectively. It was also found that the photocatalytic degradation of RhB over RE3+-Ag3VO4 (2 wt %) followed pseudo-first-order kinetics. A possible mechanism for RhB photocatalytic degradation over RE3+-Ag3VO4 catalysts is also proposed. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900835g [article] Enhanced photocatalytic activity of ag3VO4 loaded with rare-earth elements under visible-light irradiation [texte imprimé] / Hui Xu, Auteur ; Huaming Li, Auteur ; Xu, Li, Auteur . - 2010 . - pp. 10771–10778. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 24 (Décembre 2009) . - pp. 10771–10778 Mots-clés : Enhanced--Photocatalytic--Activity--Ag3VO4--Loaded--Rare-Earth Elements--under--Visible-Light--Irradiation Résumé : Rare-earth-loaded Ag3VO4 catalysts (RE3+-Ag3VO4, RE = Nd, Sm, and Eu) were prepared by the wetness impregnation technique and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), diffuse reflectance spectroscopy (DRS), and X-ray photoelectron spectroscopy (XPS). The photocatalytic activities of the samples were evaluated by rhodamine B (RhB) dye degradation under visible-light irradiation. It was found that the presence of rare-earth oxides in the host Ag3VO4 could decrease the band gap and accelerate the separation of photogenerated electron−hole pairs, which led to higher photocatalytic activities. Among the rare-earth-loaded samples, Nd3+-loaded Ag3VO4 catalyst showed the highest photocatalytic activity. The optimum contents of Nd3+, Eu3+, and Sm3+ were found to be 2, 3, and 2 wt %, respectively. It was also found that the photocatalytic degradation of RhB over RE3+-Ag3VO4 (2 wt %) followed pseudo-first-order kinetics. A possible mechanism for RhB photocatalytic degradation over RE3+-Ag3VO4 catalysts is also proposed. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900835g

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Enhanced photocatalytic activity of Ag3VO4 loaded with rare-earth elements under visible-light irradiation / Hui Xu in Industrial & engineering chemistry research, Vol. 48 N° 24 (Décembre 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 24 (Décembre 2009) . - pp. 10771–10778 Titre : Enhanced photocatalytic activity of Ag3VO4 loaded with rare-earth elements under visible-light irradiation Type de document : texte imprimé Auteurs : Hui Xu, Auteur ; Huaming Li, Auteur ; Xu, Li, Auteur Année de publication : 2010 Article en page(s) : pp. 10771–10778 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Rare-earth element Wetness impregnation technique Photocatalytic activities Résumé : Rare-earth-loaded Ag3VO4 catalysts (RE3+-Ag3VO4, RE = Nd, Sm, and Eu) were prepared by the wetness impregnation technique and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), diffuse reflectance spectroscopy (DRS), and X-ray photoelectron spectroscopy (XPS). The photocatalytic activities of the samples were evaluated by rhodamine B (RhB) dye degradation under visible-light irradiation. It was found that the presence of rare-earth oxides in the host Ag3VO4 could decrease the band gap and accelerate the separation of photogenerated electron−hole pairs, which led to higher photocatalytic activities. Among the rare-earth-loaded samples, Nd3+-loaded Ag3VO4 catalyst showed the highest photocatalytic activity. The optimum contents of Nd3+, Eu3+, and Sm3+ were found to be 2, 3, and 2 wt %, respectively. It was also found that the photocatalytic degradation of RhB over RE3+-Ag3VO4 (2 wt %) followed pseudo-first-order kinetics. A possible mechanism for RhB photocatalytic degradation over RE3+-Ag3VO4 catalysts is also proposed. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900835g [article] Enhanced photocatalytic activity of Ag3VO4 loaded with rare-earth elements under visible-light irradiation [texte imprimé] / Hui Xu, Auteur ; Huaming Li, Auteur ; Xu, Li, Auteur . - 2010 . - pp. 10771–10778. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 24 (Décembre 2009) . - pp. 10771–10778 Mots-clés : Rare-earth element Wetness impregnation technique Photocatalytic activities Résumé : Rare-earth-loaded Ag3VO4 catalysts (RE3+-Ag3VO4, RE = Nd, Sm, and Eu) were prepared by the wetness impregnation technique and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), diffuse reflectance spectroscopy (DRS), and X-ray photoelectron spectroscopy (XPS). The photocatalytic activities of the samples were evaluated by rhodamine B (RhB) dye degradation under visible-light irradiation. It was found that the presence of rare-earth oxides in the host Ag3VO4 could decrease the band gap and accelerate the separation of photogenerated electron−hole pairs, which led to higher photocatalytic activities. Among the rare-earth-loaded samples, Nd3+-loaded Ag3VO4 catalyst showed the highest photocatalytic activity. The optimum contents of Nd3+, Eu3+, and Sm3+ were found to be 2, 3, and 2 wt %, respectively. It was also found that the photocatalytic degradation of RhB over RE3+-Ag3VO4 (2 wt %) followed pseudo-first-order kinetics. A possible mechanism for RhB photocatalytic degradation over RE3+-Ag3VO4 catalysts is also proposed. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900835g

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Microphase separation and morphology of the real polymer system by dynamic density functional theory, based on the equation of state / Hui Xu in Industrial & engineering chemistry research, Vol. 47 N°17 (Septembre 2008)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 47 N°17 (Septembre 2008) . - p. 6368–6373 Titre : Microphase separation and morphology of the real polymer system by dynamic density functional theory, based on the equation of state Type de document : texte imprimé Auteurs : Hui Xu, Auteur ; Tengfang Wang, Auteur ; Yongmin Huang, Auteur Année de publication : 2008 Article en page(s) : p. 6368–6373 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Polystyrene blends Polybutadiene EOS-based DDFT Résumé : Microphase separation and morphology evolution of polystyrene and polybutadiene blends are quantitatively studied by the dynamic density functional theory that is based on the equation of state (EOS-based DDFT). The structure parameters of coarse-grained beads are regressed from the experimental pressure−volume−temperature data of pure components. The comparisons between simulated and experimental results are presented as illustrations. Notably, in the region near the critical composition, the deviation of the order−disorder transition temperature between simulation and experiment is En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701776r [article] Microphase separation and morphology of the real polymer system by dynamic density functional theory, based on the equation of state [texte imprimé] / Hui Xu, Auteur ; Tengfang Wang, Auteur ; Yongmin Huang, Auteur . - 2008 . - p. 6368–6373. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°17 (Septembre 2008) . - p. 6368–6373 Mots-clés : Polystyrene blends Polybutadiene EOS-based DDFT Résumé : Microphase separation and morphology evolution of polystyrene and polybutadiene blends are quantitatively studied by the dynamic density functional theory that is based on the equation of state (EOS-based DDFT). The structure parameters of coarse-grained beads are regressed from the experimental pressure−volume−temperature data of pure components. The comparisons between simulated and experimental results are presented as illustrations. Notably, in the region near the critical composition, the deviation of the order−disorder transition temperature between simulation and experiment is En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701776r

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