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Copper Ferrite-Graphene Hybrid / Yongsheng Fu in Industrial & engineering chemistry research, Vol. 51 N° 36 (Septembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 36 (Septembre 2012) . - pp. 11700-11709 Titre : Copper Ferrite-Graphene Hybrid : A Multifunctional Heteroarchitecture for Photocatalysis and Energy Storage Type de document : texte imprimé Auteurs : Yongsheng Fu, Auteur ; Qun Chen, Auteur ; Mingyang He, Auteur Année de publication : 2012 Article en page(s) : pp. 11700-11709 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Storage  Photocatalysis Résumé : A straightforward strategy is designed for the fabrication of CuFe2O4-graphene heteroarchitecture via a one-step hydrothermal route to allow multifunctional properties, i.e., magnetic cycling, high photocatalytic activity under visible light irradiation, and excellent electrochemical behaviors for use as the anode in lithium-ion batteries (LIBs). Transmission electron microscopy (TEM) observations indicate that graphene sheets are exfoliated and decorated with hexagonal CuFe2O4 nanoflakes. The photocatalytic activity measurements demonstrate that the combination of CuFe2O4 and graphene results in a dramatic conversion of the inert CuFe2O4 into a highly active catalyst for the degradation of methylene blue (MB) under visible light irradiation. CuFe2O4 nanoparticles themselves have excellent magnetic properties, which makes the CuFe2O4-graphene heteroarchitecture magnetically recyclable in a suspension system. It should be pointed out that the CuFe2O4-graphene (with 25 wt % graphene) heteroarchitecture as anode material for LIBs shows a high specific reversible capacity up to 1165 mAh g-1 with good cycling stability and rate capability. The superior photocatalytic activity and electrochemical performance of the CuFe2O4-graphene nanocomposite can be attributed to its unique heteroarchitechture, which provides the remarkable synergistic effect between the CuFe2O4 nanoflakes and the graphene sheets. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26350338 [article] Copper Ferrite-Graphene Hybrid : A Multifunctional Heteroarchitecture for Photocatalysis and Energy Storage [texte imprimé] / Yongsheng Fu, Auteur ; Qun Chen, Auteur ; Mingyang He, Auteur . - 2012 . - pp. 11700-11709. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 36 (Septembre 2012) . - pp. 11700-11709 Mots-clés : Storage  Photocatalysis Résumé : A straightforward strategy is designed for the fabrication of CuFe2O4-graphene heteroarchitecture via a one-step hydrothermal route to allow multifunctional properties, i.e., magnetic cycling, high photocatalytic activity under visible light irradiation, and excellent electrochemical behaviors for use as the anode in lithium-ion batteries (LIBs). Transmission electron microscopy (TEM) observations indicate that graphene sheets are exfoliated and decorated with hexagonal CuFe2O4 nanoflakes. The photocatalytic activity measurements demonstrate that the combination of CuFe2O4 and graphene results in a dramatic conversion of the inert CuFe2O4 into a highly active catalyst for the degradation of methylene blue (MB) under visible light irradiation. CuFe2O4 nanoparticles themselves have excellent magnetic properties, which makes the CuFe2O4-graphene heteroarchitecture magnetically recyclable in a suspension system. It should be pointed out that the CuFe2O4-graphene (with 25 wt % graphene) heteroarchitecture as anode material for LIBs shows a high specific reversible capacity up to 1165 mAh g-1 with good cycling stability and rate capability. The superior photocatalytic activity and electrochemical performance of the CuFe2O4-graphene nanocomposite can be attributed to its unique heteroarchitechture, which provides the remarkable synergistic effect between the CuFe2O4 nanoflakes and the graphene sheets. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26350338

High photocatalytic activity of magnetically separable manganese ferrite – graphene heteroarchitectures / Yongsheng Fu in Industrial & engineering chemistry research, Vol. 51 N° 2 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 2 (Janvier 2012) Titre : High photocatalytic activity of magnetically separable manganese ferrite – graphene heteroarchitectures Type de document : texte imprimé Auteurs : Yongsheng Fu, Auteur ; Pan Xiong, Auteur ; Haiqun Chen, Auteur Année de publication : 2012 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Photocatalysis Résumé : A simple and straightforward strategy was developed to fabricate magnetically separable MnFe2O4―grapbene photocatalysts with differing graphene content. It was found that graphene sheets were fully exfoliated and decorated with MnFe2O4 nanocrystals having an average diameter of 5.65 nm and a narrow particle size distribution. It is very interesting that, although MnFe2O4 alone is photocatalytically inactive under visible light irradiation, the combination of MnFe2O4 nanoparticles with gaphene sheets leads to high photocatalytic activity for the degradation ofmethylene blue under visible light irradiation. The strong magnetic property of MnFe2O4 nanoparticles can be used for magnetic separation in a suspension system, and therefore it does not require additional magnetic components as is the usual case. Consequently, the MnFe2O4―graphene system becomes a dual function photocatalyst. The significant enhancement in photoactivity under visible light irradiation can be ascribed to the reduction of gaphene oxide (GO), because the photogenerated electrons of MnFe2O4 can transfer easily from the conduction band to the reduced GO, effectively preventing a direct recombination of electrons and holes. Hydroxyl radicals play the role of main oxidant in the MnFe2O4―graphene system, and the radicals' oxidation reaction is obviously dominant. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476405 [article] High photocatalytic activity of magnetically separable manganese ferrite – graphene heteroarchitectures [texte imprimé] / Yongsheng Fu, Auteur ; Pan Xiong, Auteur ; Haiqun Chen, Auteur . - 2012. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 2 (Janvier 2012) Mots-clés : Photocatalysis Résumé : A simple and straightforward strategy was developed to fabricate magnetically separable MnFe2O4―grapbene photocatalysts with differing graphene content. It was found that graphene sheets were fully exfoliated and decorated with MnFe2O4 nanocrystals having an average diameter of 5.65 nm and a narrow particle size distribution. It is very interesting that, although MnFe2O4 alone is photocatalytically inactive under visible light irradiation, the combination of MnFe2O4 nanoparticles with gaphene sheets leads to high photocatalytic activity for the degradation ofmethylene blue under visible light irradiation. The strong magnetic property of MnFe2O4 nanoparticles can be used for magnetic separation in a suspension system, and therefore it does not require additional magnetic components as is the usual case. Consequently, the MnFe2O4―graphene system becomes a dual function photocatalyst. The significant enhancement in photoactivity under visible light irradiation can be ascribed to the reduction of gaphene oxide (GO), because the photogenerated electrons of MnFe2O4 can transfer easily from the conduction band to the reduced GO, effectively preventing a direct recombination of electrons and holes. Hydroxyl radicals play the role of main oxidant in the MnFe2O4―graphene system, and the radicals' oxidation reaction is obviously dominant. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476405

Magnetically separable ZnFe2O4―graphene catalyst and its high photocatalytic performance under visible light irradiation / Yongsheng Fu in Industrial & engineering chemistry research, Vol. 50 N° 12 (Juin 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 12 (Juin 2011) . - pp. 7210-7218 Titre : Magnetically separable ZnFe2O4―graphene catalyst and its high photocatalytic performance under visible light irradiation Type de document : texte imprimé Auteurs : Yongsheng Fu, Auteur ; Xin Wang, Auteur Année de publication : 2011 Article en page(s) : pp. 7210-7218 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Visible  radiation  Photocatalysis  Catalyst Résumé : A magnetically separable ZnFe2O4―graphene nanocomposite photocatalyst with different graphene content was prepared by a facile one-step hydrothermal method. The graphene sheets in this nanocomposite photocatalyst are exfoliated and decorated with ZnFe2O4 nanocrystals. It was found that in the presence of H2O2, the photodegradation rate of methylene blue (MB) was 88% after visible light irradiation for only 5 min and reached up to 99% after irradiation for 90 min. In comparison with pure ZnFe2O4 catalyst, ZnFe2O4―graphene serves a dual function as the catalyst for photoelectrochemical degradation of MB and the generator of a strong oxidant hydroxyl radical (·OH) via photoelectrochemical decomposition of H2O2 under visible light irradiation. ZnFe2O4 nanoparticles themselves have a magnetic property, which makes the ZnFe2O4―graphene composite magnetically separable in a suspension system, and therefore it does not require additional magnetic components as is the usual case. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24239035 [article] Magnetically separable ZnFe2O4―graphene catalyst and its high photocatalytic performance under visible light irradiation [texte imprimé] / Yongsheng Fu, Auteur ; Xin Wang, Auteur . - 2011 . - pp. 7210-7218. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 12 (Juin 2011) . - pp. 7210-7218 Mots-clés : Visible  radiation  Photocatalysis  Catalyst Résumé : A magnetically separable ZnFe2O4―graphene nanocomposite photocatalyst with different graphene content was prepared by a facile one-step hydrothermal method. The graphene sheets in this nanocomposite photocatalyst are exfoliated and decorated with ZnFe2O4 nanocrystals. It was found that in the presence of H2O2, the photodegradation rate of methylene blue (MB) was 88% after visible light irradiation for only 5 min and reached up to 99% after irradiation for 90 min. In comparison with pure ZnFe2O4 catalyst, ZnFe2O4―graphene serves a dual function as the catalyst for photoelectrochemical degradation of MB and the generator of a strong oxidant hydroxyl radical (·OH) via photoelectrochemical decomposition of H2O2 under visible light irradiation. ZnFe2O4 nanoparticles themselves have a magnetic property, which makes the ZnFe2O4―graphene composite magnetically separable in a suspension system, and therefore it does not require additional magnetic components as is the usual case. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24239035