Flower-like NaY（MoO4）2 particles were synthesized through a microwave-assisted hydrother- mal process followed by a subsequent calcination process. The products were characterized by X-ray diffraction, X-ray photoel...Flower-like NaY（MoO4）2 particles were synthesized through a microwave-assisted hydrother- mal process followed by a subsequent calcination process. The products were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, field-emission scanning electron mi- croscopy. The possible formation mechanism of the flower-like NaY（MoO4）2 precursor was proposed. The NaY（MoO4）2：Eu3＋ phosphors were also prepared and their luminescence properties showed the NaY（MoO4）2：Eu^3＋ materials with the emission peak at 612 nm had potential application as a red phosphor for white light-emitting diodes. Furthermore, the microwave-assisted hydrothermal process followed by a subsequent calcination process could be extended to prepare the other lanthanide molybdates with the flower-like morphology.展开更多
Mixed transition metal oxides （MTMOs） have received intensive attention as promising anode materials for lithium-ion batteries （LIBs） and sodium-ion batteries （SIBs）. In this work, we demonstrate a facile one-st...Mixed transition metal oxides （MTMOs） have received intensive attention as promising anode materials for lithium-ion batteries （LIBs） and sodium-ion batteries （SIBs）. In this work, we demonstrate a facile one-step water-bath method for the preparation of graphene oxide （GO） decorated Fe2（MoO4）3 （FMO） microflower composite （FMO/GO）, in which the FMO is constructed by numerous nanosheets. The resulting FMO/GO exhibits excellent electrochemical performances in both LIBs and SIBs. As the anode material for LIBs, the FMO/GO delivers a high capacity of 1,220 mAh·g^-1 at 200 mA·g^-1 after 50 cycles and a capacity of 685 mAh·g^-1 at a high current density of 10 A·g^-1. As the anode material for SIBs, the FMO/GO shows an initial discharge capacity of 571 mAh·g^-1 at 100 mA·g^-1, maintaining a discharge capacity of 307 mAh·g^-1 after 100 cycles. The promising performance is attributed to the good electrical transport from the intimate contact between FMO and graphene oxide. This work indicates that the FMO/GO composite is a promising anode for high-performance lithium and sodium storage.展开更多
文摘Flower-like NaY（MoO4）2 particles were synthesized through a microwave-assisted hydrother- mal process followed by a subsequent calcination process. The products were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, field-emission scanning electron mi- croscopy. The possible formation mechanism of the flower-like NaY（MoO4）2 precursor was proposed. The NaY（MoO4）2：Eu3＋ phosphors were also prepared and their luminescence properties showed the NaY（MoO4）2：Eu^3＋ materials with the emission peak at 612 nm had potential application as a red phosphor for white light-emitting diodes. Furthermore, the microwave-assisted hydrothermal process followed by a subsequent calcination process could be extended to prepare the other lanthanide molybdates with the flower-like morphology.
基金This work was supported by the National Key Research and Development Program of China （No. 2016YFA0202603）, the National Basic Research Program of China （No. 2013CB934103）, the Programme of Introducing Talents of Discipline to Universities （No. B17034）, the National Natural Science Foundation of China （Nos. 51521001, 21673171, 51502226, and 51302203）, the National Natural Science Fund for Distinguished Young Scholars （No. 51425204）, and the Fundamental Research Funds for the Central Universities （WUT： 2016III001, 2016III002, 2016III006）.Thanks to Prof. Zhaoping Liu and Prof. Xufeng Zhou at Ningbo Institute of Material Technology and Engineering of Chinese Academy of Sciences for providing the graphene oxide. Prof. Liqiang Mai gratefully acknowledged financial support from China Scholarship Council （No. 201606955096）.
文摘Mixed transition metal oxides （MTMOs） have received intensive attention as promising anode materials for lithium-ion batteries （LIBs） and sodium-ion batteries （SIBs）. In this work, we demonstrate a facile one-step water-bath method for the preparation of graphene oxide （GO） decorated Fe2（MoO4）3 （FMO） microflower composite （FMO/GO）, in which the FMO is constructed by numerous nanosheets. The resulting FMO/GO exhibits excellent electrochemical performances in both LIBs and SIBs. As the anode material for LIBs, the FMO/GO delivers a high capacity of 1,220 mAh·g^-1 at 200 mA·g^-1 after 50 cycles and a capacity of 685 mAh·g^-1 at a high current density of 10 A·g^-1. As the anode material for SIBs, the FMO/GO shows an initial discharge capacity of 571 mAh·g^-1 at 100 mA·g^-1, maintaining a discharge capacity of 307 mAh·g^-1 after 100 cycles. The promising performance is attributed to the good electrical transport from the intimate contact between FMO and graphene oxide. This work indicates that the FMO/GO composite is a promising anode for high-performance lithium and sodium storage.
