Superconducting<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>PrBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>O</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="italic">x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>

Zou, Zhigang; Ye, Jinhua; Oka, Kunihiko; Nishihara, Y.

doi:10.1103/physrevlett.80.1074

Cited by 258 publications

(106 citation statements)

References 12 publications

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“…Hence, one could suspect that these compounds, if synthesized as a single "123" phase, should exhibit superconducting properties, too. The discovery of superconductivity in Pr123 [8][9][10][11][12] supports this reasoning. From the technological point of view, however, the situation is much more complicated since there is a strong experimental evidence that some fraction of Ba sites in the R123 lattice is occupied by the rare-earth ions (R Ba defects) [13].…”

Section: Introductionsupporting

confidence: 59%

Structural properties of hypothetical CeBa2Cu3O7 compound from LSDA+DMFT calculations

Łuszczek

2016

Materials Science-Poland

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The hypothetical stoichiometric CeBa 2 Cu 3 O 7 (Ce123) compound, which has not been synthesized as a single phase yet, was studied by the density functional theory (DFT). We utilized a method which merges the local spin density approximation (LSDA) with the dynamical mean-field theory (DMFT) to account for the electronic correlations. The LSDA+DMFT calculations were performed in the high-temperature range. The particular emphasis was put on the pressure-induced changes in the electronic band structure related to strongly correlated 4f states. The computational results indicate the occurrence of a large negative volumetric thermal expansion coefficient near T = 500 K and a trace of a low-volume isostructural metastable state at high temperatures.

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Section: Introductionsupporting

confidence: 59%

Structural properties of hypothetical CeBa2Cu3O7 compound from LSDA+DMFT calculations

Łuszczek

2016

Materials Science-Poland

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“…Here, we would like to comment on superconductivity with T c =85K in a Pr123 single crystal reported by Zou et al 17 . Surely, the origin of bulk superconductivity in Pr123 has not been made clear, but several authors claimed that the superconductivity originates from the inhomogeneities in the chemical composition such as the Ba-rich Pr123 18 .…”

Section: Fig 1: Schematic View Of the Pr2ba4cu7omentioning

confidence: 99%

Superconductivity in Pr2Ba4Cu7O15− with metallic double chains

Matsukawa¹,

Yamada²,

Chiba³

et al. 2004

Physica C: Superconductivity and its Applications

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We report superconductivity with Tc,onset=∼16K in polycrystalline samples of Pr2Ba4Cu7O 15−δ possessing metallic double chains. A reduction treatment on as-sintered samples causes not only the enhanced metallic conduction but also the appearance of superconductivity. This finding is strongly contrast with the oxygen removal effect of superconducting Y2Ba4Cu7O 15−δ . FIG. 1: Schematic view of the Pr2Ba4Cu7O

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“…Tang et al 8 reported that photocatalytic degradation of MB over TiO 2 was also owing to dye-sensitized process under visible light irradiation. Based on above researches, we can draw a conclusion that the effect of dye-sensitized process on photocatalytic degradation of MB over TiO 2 is a little better than the effect of low capacity of visible light irradiation 7,2006 to penetrate in a media that contains a fine suspension of TiO 2 . Thus the rate of MB photolysis was almost the same as that of MB degradation with TiO 2 as the catalyst.…”

Section: Photocatalytic Degradation Of Methylene Bluementioning

confidence: 99%

“…6 In addition, scientific interest in the photocatalytic degradation of aqueous organic pollutants has quickly increased recently. [7][8][9] In particular, it was reported that 15% of the total world production of dyes is lost during the dyeing process and is released to the textile effluents, which eventually pollute the groundwater. The release of those colored waste waters in the ecosystem is a dramatic source of non-aesthetic pollution, eutrophication and perturbations in the aquatic life.…”

Section: Introductionmentioning

confidence: 99%

Photophysical and photocatalytic properties of novel M2BiNbO7 (M = In and Ga)

Luan¹,

Zheng²,

Hao³

et al. 2006

J. Braz. Chem. Soc.

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Os óxidos M 2 BiNbO 7 (M = In e Ga) foram sintetizados através de reações no estado sólido, e suas propriedades estruturais e fotocatalíticas, investigadas. Os resultados indicaram que estes compostos cristalizam na estrutura do tipo pirocloro, no sistema cúbico, grupo espacial Fd-3m. Os valores estimados dos "band gaps" dos óxidos In 2 BiNbO 7 e Ga 2 BiNbO 7 são 2,52(5) e 2,57(8) eV, respectivamente. A reação fotocatalítica da decomposição de água pura foi estudada na presença dos fotocatalisadores M 2 BiNbO 7 (M = In e Ga) e irradiação no ultravioleta, através do monitoramento da formação de H 2 e de O 2 . A degradação fotocatalítica do corante azul de metileno em água, na presença destes óxidos, foi investigada sob irradiação no visível. Os catalisadores M 2 BiNbO 7 (M = In e Ga) mostraram-se mais ativos do que o P-25, nessas condições. Completa degradação do azul de metileno foi observada após irradiação no visível durante 160 minutos, na presença do fotocatalisador Ga 2 BiNbO 7 , e após 180 minutos na presença de In 2 BiNbO 7 . A diminuição do teor total de carbono (TOC) e a formação dos produtos SO 42-e NO 3 -confirmaram a mineralização do azul de metileno durante o processo fotocatalítico.M 2 BiNbO 7 (M = In and Ga) were synthesized by solid-state reaction method and their structural and photocatalytic properties were investigated. The results indicated that these compounds crystallize in the pyrochlore-type structure, cubic system with space group Fd-3m. In addition, the band gaps of In 2 BiNbO 7 and Ga 2 BiNbO 7 were estimated to be about 2.52(5) and 2.57(8) eV, respectively. For the photocatalytic water splitting reaction, H 2 or O 2 evolution was observed from pure water respectively with M 2 BiNbO 7 (M = In and Ga) as the photocatalysts under ultraviolet light irradiation. Photocatalytic degradation of aqueous methylene blue (MB) dye over these compounds was further investigated under visible light irradiation. M 2 BiNbO 7 (M = In and Ga) showed markedly higher catalytic activity compared to P-25 for MB photocatalytic degradation under visible light irradiation. Complete removal of aqueous MB was observed after visible light irradiation for 160 min with the Ga 2 BiNbO 7 as the photocatalyst and for 180 min with the In 2 BiNbO 7 as the photocatalyst. The decrease of the total organic carbon (TOC) and the formation of inorganic products, SO 4 2-and NO 3 -, demonstrated the continuous mineralization of aqueous MB during the photocatalytic process.Keywords: inorganic photocatalysts, crystal structure, removal of methylene blue dye, band structure, visible light irradiation IntroductionSince Honda and Fujishima first observed the splitting of water on TiO 2 electrode in 1972, 1 the investigation of semiconductor photocatalysts has attracted much attention from both academic and industrial societies. 2,3 The photocatalytic water splitting using solar energy to produce hydrogen gas is crucial owing to the emergent requirement of clean and renewable sources. [2][3][4] Up to now, some photocatalysts with di...

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SuperconductingPrBa2Cu3Ox

Cited by 258 publications

References 12 publications

Structural properties of hypothetical CeBa2Cu3O7 compound from LSDA+DMFT calculations

Structural properties of hypothetical CeBa2Cu3O7 compound from LSDA+DMFT calculations

Superconductivity in Pr2Ba4Cu7O15− with metallic double chains

Photophysical and photocatalytic properties of novel M2BiNbO7 (M = In and Ga)

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