A-site nonstoichiometry and B-site doping with selected M<ce:sup loc="post">3<ce:hsp sp="0.10"/>+</ce:sup> cations in La<ce:inf loc="post">2-x</ce:inf>Cu<ce:inf loc="post">1-y-z</ce:inf>Ni<ce:inf loc="post">y</ce:inf>M<ce:inf loc="post">z</ce:inf>O<ce:inf loc="post">4-δ</ce:inf> layered oxides
In this work studies on a modification of Cu-based, layered oxides with K2NiF4-type structure are presented concerning formation of cationic nonstoichiometry in the A-sublattice of the parent La2CuO4, as well as an introduction of selected M3+ cations (Sc, Ga, In) at the B-site into La1.9Cu1-xMxO4 a...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Zhang, Zijia [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2018transfer abstract |
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| Umfang: |
6 |
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| Übergeordnetes Werk: |
Enthalten in: P616 TGFβ1 STIMULATION OF HUMAN BONE MARROW MESENCHYMAL STEM CELLS (MSC) ENHANCES THEIR HEPATIC ENGRAFTMENT AND THERAPEUTIC EFFECT IN INJURED LIVER VIA UPREGULATION OF CXCR3 FUNCTION - Garg, A. ELSEVIER, 2014, diffusion and reactions, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:317 ; year:2018 ; pages:26-31 ; extent:6 |
| Links: |
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| DOI / URN: |
10.1016/j.ssi.2017.12.037 |
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ELV042045215 |
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| 245 | 1 | 0 | |a A-site nonstoichiometry and B-site doping with selected M<ce:sup loc="post">3<ce:hsp sp="0.10"/>+</ce:sup> cations in La<ce:inf loc="post">2-x</ce:inf>Cu<ce:inf loc="post">1-y-z</ce:inf>Ni<ce:inf loc="post">y</ce:inf>M<ce:inf loc="post">z</ce:inf>O<ce:inf loc="post">4-δ</ce:inf> layered oxides |
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| 520 | |a In this work studies on a modification of Cu-based, layered oxides with K2NiF4-type structure are presented concerning formation of cationic nonstoichiometry in the A-sublattice of the parent La2CuO4, as well as an introduction of selected M3+ cations (Sc, Ga, In) at the B-site into La1.9Cu1-xMxO4 and Ni-containing La1.9Cu0.45Ni0.45M0.1O4. It is shown that synthesis of phase-pure La2-xCuO4 can be done with values of x ≤0.1, and in the A-site nonstoichiometric materials further doping with M3+ is also achievable. Formation of solid solutions for M3+-doped samples follows the expected trend, with the widest range observed for the smallest Sc3+ cation, z ≤0.1. Apart from a different structural behavior of the doped oxides at high temperatures, it is documented that the discussed substitution affects strongly the oxygen content (e.g. high concentration of the oxygen vacancies is present in La1.9CuO4-δ), as well as electrical conductivity. This is documented by the high-temperature X-ray diffraction, thermogravimetric, iodometic titration and electrical measurements. Since the compounds possess good transport properties, are stable at elevated temperatures, exhibit moderate thermal expansion and are Co-, Sr- and Ba-free, the proposed doping strategy seems interesting concerning development of the oxygen-transporting membranes based on Cu-containing oxides. For example, 1mm thick La1.9Cu0.9Sc0.1O4-δ membrane was found to deliver 0.37mLcm−2 min−1 oxygen flux at 950°C, a very high value for the K2NiF4-type materials. | ||
| 520 | |a In this work studies on a modification of Cu-based, layered oxides with K2NiF4-type structure are presented concerning formation of cationic nonstoichiometry in the A-sublattice of the parent La2CuO4, as well as an introduction of selected M3+ cations (Sc, Ga, In) at the B-site into La1.9Cu1-xMxO4 and Ni-containing La1.9Cu0.45Ni0.45M0.1O4. It is shown that synthesis of phase-pure La2-xCuO4 can be done with values of x ≤0.1, and in the A-site nonstoichiometric materials further doping with M3+ is also achievable. Formation of solid solutions for M3+-doped samples follows the expected trend, with the widest range observed for the smallest Sc3+ cation, z ≤0.1. Apart from a different structural behavior of the doped oxides at high temperatures, it is documented that the discussed substitution affects strongly the oxygen content (e.g. high concentration of the oxygen vacancies is present in La1.9CuO4-δ), as well as electrical conductivity. This is documented by the high-temperature X-ray diffraction, thermogravimetric, iodometic titration and electrical measurements. Since the compounds possess good transport properties, are stable at elevated temperatures, exhibit moderate thermal expansion and are Co-, Sr- and Ba-free, the proposed doping strategy seems interesting concerning development of the oxygen-transporting membranes based on Cu-containing oxides. For example, 1mm thick La1.9Cu0.9Sc0.1O4-δ membrane was found to deliver 0.37mLcm−2 min−1 oxygen flux at 950°C, a very high value for the K2NiF4-type materials. | ||
| 700 | 1 | |a Du, Zhihong |4 oth | |
| 700 | 1 | |a Niemczyk, Anna |4 oth | |
| 700 | 1 | |a Li, Kui |4 oth | |
| 700 | 1 | |a Zhao, Hailei |4 oth | |
| 700 | 1 | |a Świerczek, Konrad |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier Science |a Garg, A. ELSEVIER |t P616 TGFβ1 STIMULATION OF HUMAN BONE MARROW MESENCHYMAL STEM CELLS (MSC) ENHANCES THEIR HEPATIC ENGRAFTMENT AND THERAPEUTIC EFFECT IN INJURED LIVER VIA UPREGULATION OF CXCR3 FUNCTION |d 2014 |d diffusion and reactions |g Amsterdam [u.a.] |w (DE-627)ELV012106844 |
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10.1016/j.ssi.2017.12.037 doi GBV00000000000500.pica (DE-627)ELV042045215 (ELSEVIER)S0167-2738(17)30806-8 DE-627 ger DE-627 rakwb eng 610 VZ 610 VZ 44.44 bkl Zhang, Zijia verfasserin aut A-site nonstoichiometry and B-site doping with selected M<ce:sup loc="post">3<ce:hsp sp="0.10"/>+</ce:sup> cations in La<ce:inf loc="post">2-x</ce:inf>Cu<ce:inf loc="post">1-y-z</ce:inf>Ni<ce:inf loc="post">y</ce:inf>M<ce:inf loc="post">z</ce:inf>O<ce:inf loc="post">4-δ</ce:inf> layered oxides 2018transfer abstract 6 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this work studies on a modification of Cu-based, layered oxides with K2NiF4-type structure are presented concerning formation of cationic nonstoichiometry in the A-sublattice of the parent La2CuO4, as well as an introduction of selected M3+ cations (Sc, Ga, In) at the B-site into La1.9Cu1-xMxO4 and Ni-containing La1.9Cu0.45Ni0.45M0.1O4. It is shown that synthesis of phase-pure La2-xCuO4 can be done with values of x ≤0.1, and in the A-site nonstoichiometric materials further doping with M3+ is also achievable. Formation of solid solutions for M3+-doped samples follows the expected trend, with the widest range observed for the smallest Sc3+ cation, z ≤0.1. Apart from a different structural behavior of the doped oxides at high temperatures, it is documented that the discussed substitution affects strongly the oxygen content (e.g. high concentration of the oxygen vacancies is present in La1.9CuO4-δ), as well as electrical conductivity. This is documented by the high-temperature X-ray diffraction, thermogravimetric, iodometic titration and electrical measurements. Since the compounds possess good transport properties, are stable at elevated temperatures, exhibit moderate thermal expansion and are Co-, Sr- and Ba-free, the proposed doping strategy seems interesting concerning development of the oxygen-transporting membranes based on Cu-containing oxides. For example, 1mm thick La1.9Cu0.9Sc0.1O4-δ membrane was found to deliver 0.37mLcm−2 min−1 oxygen flux at 950°C, a very high value for the K2NiF4-type materials. In this work studies on a modification of Cu-based, layered oxides with K2NiF4-type structure are presented concerning formation of cationic nonstoichiometry in the A-sublattice of the parent La2CuO4, as well as an introduction of selected M3+ cations (Sc, Ga, In) at the B-site into La1.9Cu1-xMxO4 and Ni-containing La1.9Cu0.45Ni0.45M0.1O4. It is shown that synthesis of phase-pure La2-xCuO4 can be done with values of x ≤0.1, and in the A-site nonstoichiometric materials further doping with M3+ is also achievable. Formation of solid solutions for M3+-doped samples follows the expected trend, with the widest range observed for the smallest Sc3+ cation, z ≤0.1. Apart from a different structural behavior of the doped oxides at high temperatures, it is documented that the discussed substitution affects strongly the oxygen content (e.g. high concentration of the oxygen vacancies is present in La1.9CuO4-δ), as well as electrical conductivity. This is documented by the high-temperature X-ray diffraction, thermogravimetric, iodometic titration and electrical measurements. Since the compounds possess good transport properties, are stable at elevated temperatures, exhibit moderate thermal expansion and are Co-, Sr- and Ba-free, the proposed doping strategy seems interesting concerning development of the oxygen-transporting membranes based on Cu-containing oxides. For example, 1mm thick La1.9Cu0.9Sc0.1O4-δ membrane was found to deliver 0.37mLcm−2 min−1 oxygen flux at 950°C, a very high value for the K2NiF4-type materials. Du, Zhihong oth Niemczyk, Anna oth Li, Kui oth Zhao, Hailei oth Świerczek, Konrad oth Enthalten in Elsevier Science Garg, A. ELSEVIER P616 TGFβ1 STIMULATION OF HUMAN BONE MARROW MESENCHYMAL STEM CELLS (MSC) ENHANCES THEIR HEPATIC ENGRAFTMENT AND THERAPEUTIC EFFECT IN INJURED LIVER VIA UPREGULATION OF CXCR3 FUNCTION 2014 diffusion and reactions Amsterdam [u.a.] (DE-627)ELV012106844 volume:317 year:2018 pages:26-31 extent:6 https://doi.org/10.1016/j.ssi.2017.12.037 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_21 GBV_ILN_78 44.44 Parasitologie Medizin VZ AR 317 2018 26-31 6 |
| spelling |
10.1016/j.ssi.2017.12.037 doi GBV00000000000500.pica (DE-627)ELV042045215 (ELSEVIER)S0167-2738(17)30806-8 DE-627 ger DE-627 rakwb eng 610 VZ 610 VZ 44.44 bkl Zhang, Zijia verfasserin aut A-site nonstoichiometry and B-site doping with selected M<ce:sup loc="post">3<ce:hsp sp="0.10"/>+</ce:sup> cations in La<ce:inf loc="post">2-x</ce:inf>Cu<ce:inf loc="post">1-y-z</ce:inf>Ni<ce:inf loc="post">y</ce:inf>M<ce:inf loc="post">z</ce:inf>O<ce:inf loc="post">4-δ</ce:inf> layered oxides 2018transfer abstract 6 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this work studies on a modification of Cu-based, layered oxides with K2NiF4-type structure are presented concerning formation of cationic nonstoichiometry in the A-sublattice of the parent La2CuO4, as well as an introduction of selected M3+ cations (Sc, Ga, In) at the B-site into La1.9Cu1-xMxO4 and Ni-containing La1.9Cu0.45Ni0.45M0.1O4. It is shown that synthesis of phase-pure La2-xCuO4 can be done with values of x ≤0.1, and in the A-site nonstoichiometric materials further doping with M3+ is also achievable. Formation of solid solutions for M3+-doped samples follows the expected trend, with the widest range observed for the smallest Sc3+ cation, z ≤0.1. Apart from a different structural behavior of the doped oxides at high temperatures, it is documented that the discussed substitution affects strongly the oxygen content (e.g. high concentration of the oxygen vacancies is present in La1.9CuO4-δ), as well as electrical conductivity. This is documented by the high-temperature X-ray diffraction, thermogravimetric, iodometic titration and electrical measurements. Since the compounds possess good transport properties, are stable at elevated temperatures, exhibit moderate thermal expansion and are Co-, Sr- and Ba-free, the proposed doping strategy seems interesting concerning development of the oxygen-transporting membranes based on Cu-containing oxides. For example, 1mm thick La1.9Cu0.9Sc0.1O4-δ membrane was found to deliver 0.37mLcm−2 min−1 oxygen flux at 950°C, a very high value for the K2NiF4-type materials. In this work studies on a modification of Cu-based, layered oxides with K2NiF4-type structure are presented concerning formation of cationic nonstoichiometry in the A-sublattice of the parent La2CuO4, as well as an introduction of selected M3+ cations (Sc, Ga, In) at the B-site into La1.9Cu1-xMxO4 and Ni-containing La1.9Cu0.45Ni0.45M0.1O4. It is shown that synthesis of phase-pure La2-xCuO4 can be done with values of x ≤0.1, and in the A-site nonstoichiometric materials further doping with M3+ is also achievable. Formation of solid solutions for M3+-doped samples follows the expected trend, with the widest range observed for the smallest Sc3+ cation, z ≤0.1. Apart from a different structural behavior of the doped oxides at high temperatures, it is documented that the discussed substitution affects strongly the oxygen content (e.g. high concentration of the oxygen vacancies is present in La1.9CuO4-δ), as well as electrical conductivity. This is documented by the high-temperature X-ray diffraction, thermogravimetric, iodometic titration and electrical measurements. Since the compounds possess good transport properties, are stable at elevated temperatures, exhibit moderate thermal expansion and are Co-, Sr- and Ba-free, the proposed doping strategy seems interesting concerning development of the oxygen-transporting membranes based on Cu-containing oxides. For example, 1mm thick La1.9Cu0.9Sc0.1O4-δ membrane was found to deliver 0.37mLcm−2 min−1 oxygen flux at 950°C, a very high value for the K2NiF4-type materials. Du, Zhihong oth Niemczyk, Anna oth Li, Kui oth Zhao, Hailei oth Świerczek, Konrad oth Enthalten in Elsevier Science Garg, A. ELSEVIER P616 TGFβ1 STIMULATION OF HUMAN BONE MARROW MESENCHYMAL STEM CELLS (MSC) ENHANCES THEIR HEPATIC ENGRAFTMENT AND THERAPEUTIC EFFECT IN INJURED LIVER VIA UPREGULATION OF CXCR3 FUNCTION 2014 diffusion and reactions Amsterdam [u.a.] (DE-627)ELV012106844 volume:317 year:2018 pages:26-31 extent:6 https://doi.org/10.1016/j.ssi.2017.12.037 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_21 GBV_ILN_78 44.44 Parasitologie Medizin VZ AR 317 2018 26-31 6 |
| allfields_unstemmed |
10.1016/j.ssi.2017.12.037 doi GBV00000000000500.pica (DE-627)ELV042045215 (ELSEVIER)S0167-2738(17)30806-8 DE-627 ger DE-627 rakwb eng 610 VZ 610 VZ 44.44 bkl Zhang, Zijia verfasserin aut A-site nonstoichiometry and B-site doping with selected M<ce:sup loc="post">3<ce:hsp sp="0.10"/>+</ce:sup> cations in La<ce:inf loc="post">2-x</ce:inf>Cu<ce:inf loc="post">1-y-z</ce:inf>Ni<ce:inf loc="post">y</ce:inf>M<ce:inf loc="post">z</ce:inf>O<ce:inf loc="post">4-δ</ce:inf> layered oxides 2018transfer abstract 6 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this work studies on a modification of Cu-based, layered oxides with K2NiF4-type structure are presented concerning formation of cationic nonstoichiometry in the A-sublattice of the parent La2CuO4, as well as an introduction of selected M3+ cations (Sc, Ga, In) at the B-site into La1.9Cu1-xMxO4 and Ni-containing La1.9Cu0.45Ni0.45M0.1O4. It is shown that synthesis of phase-pure La2-xCuO4 can be done with values of x ≤0.1, and in the A-site nonstoichiometric materials further doping with M3+ is also achievable. Formation of solid solutions for M3+-doped samples follows the expected trend, with the widest range observed for the smallest Sc3+ cation, z ≤0.1. Apart from a different structural behavior of the doped oxides at high temperatures, it is documented that the discussed substitution affects strongly the oxygen content (e.g. high concentration of the oxygen vacancies is present in La1.9CuO4-δ), as well as electrical conductivity. This is documented by the high-temperature X-ray diffraction, thermogravimetric, iodometic titration and electrical measurements. Since the compounds possess good transport properties, are stable at elevated temperatures, exhibit moderate thermal expansion and are Co-, Sr- and Ba-free, the proposed doping strategy seems interesting concerning development of the oxygen-transporting membranes based on Cu-containing oxides. For example, 1mm thick La1.9Cu0.9Sc0.1O4-δ membrane was found to deliver 0.37mLcm−2 min−1 oxygen flux at 950°C, a very high value for the K2NiF4-type materials. In this work studies on a modification of Cu-based, layered oxides with K2NiF4-type structure are presented concerning formation of cationic nonstoichiometry in the A-sublattice of the parent La2CuO4, as well as an introduction of selected M3+ cations (Sc, Ga, In) at the B-site into La1.9Cu1-xMxO4 and Ni-containing La1.9Cu0.45Ni0.45M0.1O4. It is shown that synthesis of phase-pure La2-xCuO4 can be done with values of x ≤0.1, and in the A-site nonstoichiometric materials further doping with M3+ is also achievable. Formation of solid solutions for M3+-doped samples follows the expected trend, with the widest range observed for the smallest Sc3+ cation, z ≤0.1. Apart from a different structural behavior of the doped oxides at high temperatures, it is documented that the discussed substitution affects strongly the oxygen content (e.g. high concentration of the oxygen vacancies is present in La1.9CuO4-δ), as well as electrical conductivity. This is documented by the high-temperature X-ray diffraction, thermogravimetric, iodometic titration and electrical measurements. Since the compounds possess good transport properties, are stable at elevated temperatures, exhibit moderate thermal expansion and are Co-, Sr- and Ba-free, the proposed doping strategy seems interesting concerning development of the oxygen-transporting membranes based on Cu-containing oxides. For example, 1mm thick La1.9Cu0.9Sc0.1O4-δ membrane was found to deliver 0.37mLcm−2 min−1 oxygen flux at 950°C, a very high value for the K2NiF4-type materials. Du, Zhihong oth Niemczyk, Anna oth Li, Kui oth Zhao, Hailei oth Świerczek, Konrad oth Enthalten in Elsevier Science Garg, A. ELSEVIER P616 TGFβ1 STIMULATION OF HUMAN BONE MARROW MESENCHYMAL STEM CELLS (MSC) ENHANCES THEIR HEPATIC ENGRAFTMENT AND THERAPEUTIC EFFECT IN INJURED LIVER VIA UPREGULATION OF CXCR3 FUNCTION 2014 diffusion and reactions Amsterdam [u.a.] (DE-627)ELV012106844 volume:317 year:2018 pages:26-31 extent:6 https://doi.org/10.1016/j.ssi.2017.12.037 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_21 GBV_ILN_78 44.44 Parasitologie Medizin VZ AR 317 2018 26-31 6 |
| allfieldsGer |
10.1016/j.ssi.2017.12.037 doi GBV00000000000500.pica (DE-627)ELV042045215 (ELSEVIER)S0167-2738(17)30806-8 DE-627 ger DE-627 rakwb eng 610 VZ 610 VZ 44.44 bkl Zhang, Zijia verfasserin aut A-site nonstoichiometry and B-site doping with selected M<ce:sup loc="post">3<ce:hsp sp="0.10"/>+</ce:sup> cations in La<ce:inf loc="post">2-x</ce:inf>Cu<ce:inf loc="post">1-y-z</ce:inf>Ni<ce:inf loc="post">y</ce:inf>M<ce:inf loc="post">z</ce:inf>O<ce:inf loc="post">4-δ</ce:inf> layered oxides 2018transfer abstract 6 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this work studies on a modification of Cu-based, layered oxides with K2NiF4-type structure are presented concerning formation of cationic nonstoichiometry in the A-sublattice of the parent La2CuO4, as well as an introduction of selected M3+ cations (Sc, Ga, In) at the B-site into La1.9Cu1-xMxO4 and Ni-containing La1.9Cu0.45Ni0.45M0.1O4. It is shown that synthesis of phase-pure La2-xCuO4 can be done with values of x ≤0.1, and in the A-site nonstoichiometric materials further doping with M3+ is also achievable. Formation of solid solutions for M3+-doped samples follows the expected trend, with the widest range observed for the smallest Sc3+ cation, z ≤0.1. Apart from a different structural behavior of the doped oxides at high temperatures, it is documented that the discussed substitution affects strongly the oxygen content (e.g. high concentration of the oxygen vacancies is present in La1.9CuO4-δ), as well as electrical conductivity. This is documented by the high-temperature X-ray diffraction, thermogravimetric, iodometic titration and electrical measurements. Since the compounds possess good transport properties, are stable at elevated temperatures, exhibit moderate thermal expansion and are Co-, Sr- and Ba-free, the proposed doping strategy seems interesting concerning development of the oxygen-transporting membranes based on Cu-containing oxides. For example, 1mm thick La1.9Cu0.9Sc0.1O4-δ membrane was found to deliver 0.37mLcm−2 min−1 oxygen flux at 950°C, a very high value for the K2NiF4-type materials. In this work studies on a modification of Cu-based, layered oxides with K2NiF4-type structure are presented concerning formation of cationic nonstoichiometry in the A-sublattice of the parent La2CuO4, as well as an introduction of selected M3+ cations (Sc, Ga, In) at the B-site into La1.9Cu1-xMxO4 and Ni-containing La1.9Cu0.45Ni0.45M0.1O4. It is shown that synthesis of phase-pure La2-xCuO4 can be done with values of x ≤0.1, and in the A-site nonstoichiometric materials further doping with M3+ is also achievable. Formation of solid solutions for M3+-doped samples follows the expected trend, with the widest range observed for the smallest Sc3+ cation, z ≤0.1. Apart from a different structural behavior of the doped oxides at high temperatures, it is documented that the discussed substitution affects strongly the oxygen content (e.g. high concentration of the oxygen vacancies is present in La1.9CuO4-δ), as well as electrical conductivity. This is documented by the high-temperature X-ray diffraction, thermogravimetric, iodometic titration and electrical measurements. Since the compounds possess good transport properties, are stable at elevated temperatures, exhibit moderate thermal expansion and are Co-, Sr- and Ba-free, the proposed doping strategy seems interesting concerning development of the oxygen-transporting membranes based on Cu-containing oxides. For example, 1mm thick La1.9Cu0.9Sc0.1O4-δ membrane was found to deliver 0.37mLcm−2 min−1 oxygen flux at 950°C, a very high value for the K2NiF4-type materials. Du, Zhihong oth Niemczyk, Anna oth Li, Kui oth Zhao, Hailei oth Świerczek, Konrad oth Enthalten in Elsevier Science Garg, A. ELSEVIER P616 TGFβ1 STIMULATION OF HUMAN BONE MARROW MESENCHYMAL STEM CELLS (MSC) ENHANCES THEIR HEPATIC ENGRAFTMENT AND THERAPEUTIC EFFECT IN INJURED LIVER VIA UPREGULATION OF CXCR3 FUNCTION 2014 diffusion and reactions Amsterdam [u.a.] (DE-627)ELV012106844 volume:317 year:2018 pages:26-31 extent:6 https://doi.org/10.1016/j.ssi.2017.12.037 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_21 GBV_ILN_78 44.44 Parasitologie Medizin VZ AR 317 2018 26-31 6 |
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a-site nonstoichiometry and b-site doping with selected m<ce:sup loc="post">3<ce:hsp sp="0.10"/>+</ce:sup> cations in la<ce:inf loc="post">2-x</ce:inf>cu<ce:inf loc="post">1-y-z</ce:inf>ni<ce:inf loc="post">y</ce:inf>m<ce:inf loc="post">z</ce:inf>o<ce:inf loc="post">4-δ</ce:inf> layered oxides |
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A-site nonstoichiometry and B-site doping with selected M<ce:sup loc="post">3<ce:hsp sp="0.10"/>+</ce:sup> cations in La<ce:inf loc="post">2-x</ce:inf>Cu<ce:inf loc="post">1-y-z</ce:inf>Ni<ce:inf loc="post">y</ce:inf>M<ce:inf loc="post">z</ce:inf>O<ce:inf loc="post">4-δ</ce:inf> layered oxides |
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In this work studies on a modification of Cu-based, layered oxides with K2NiF4-type structure are presented concerning formation of cationic nonstoichiometry in the A-sublattice of the parent La2CuO4, as well as an introduction of selected M3+ cations (Sc, Ga, In) at the B-site into La1.9Cu1-xMxO4 and Ni-containing La1.9Cu0.45Ni0.45M0.1O4. It is shown that synthesis of phase-pure La2-xCuO4 can be done with values of x ≤0.1, and in the A-site nonstoichiometric materials further doping with M3+ is also achievable. Formation of solid solutions for M3+-doped samples follows the expected trend, with the widest range observed for the smallest Sc3+ cation, z ≤0.1. Apart from a different structural behavior of the doped oxides at high temperatures, it is documented that the discussed substitution affects strongly the oxygen content (e.g. high concentration of the oxygen vacancies is present in La1.9CuO4-δ), as well as electrical conductivity. This is documented by the high-temperature X-ray diffraction, thermogravimetric, iodometic titration and electrical measurements. Since the compounds possess good transport properties, are stable at elevated temperatures, exhibit moderate thermal expansion and are Co-, Sr- and Ba-free, the proposed doping strategy seems interesting concerning development of the oxygen-transporting membranes based on Cu-containing oxides. For example, 1mm thick La1.9Cu0.9Sc0.1O4-δ membrane was found to deliver 0.37mLcm−2 min−1 oxygen flux at 950°C, a very high value for the K2NiF4-type materials. |
| abstractGer |
In this work studies on a modification of Cu-based, layered oxides with K2NiF4-type structure are presented concerning formation of cationic nonstoichiometry in the A-sublattice of the parent La2CuO4, as well as an introduction of selected M3+ cations (Sc, Ga, In) at the B-site into La1.9Cu1-xMxO4 and Ni-containing La1.9Cu0.45Ni0.45M0.1O4. It is shown that synthesis of phase-pure La2-xCuO4 can be done with values of x ≤0.1, and in the A-site nonstoichiometric materials further doping with M3+ is also achievable. Formation of solid solutions for M3+-doped samples follows the expected trend, with the widest range observed for the smallest Sc3+ cation, z ≤0.1. Apart from a different structural behavior of the doped oxides at high temperatures, it is documented that the discussed substitution affects strongly the oxygen content (e.g. high concentration of the oxygen vacancies is present in La1.9CuO4-δ), as well as electrical conductivity. This is documented by the high-temperature X-ray diffraction, thermogravimetric, iodometic titration and electrical measurements. Since the compounds possess good transport properties, are stable at elevated temperatures, exhibit moderate thermal expansion and are Co-, Sr- and Ba-free, the proposed doping strategy seems interesting concerning development of the oxygen-transporting membranes based on Cu-containing oxides. For example, 1mm thick La1.9Cu0.9Sc0.1O4-δ membrane was found to deliver 0.37mLcm−2 min−1 oxygen flux at 950°C, a very high value for the K2NiF4-type materials. |
| abstract_unstemmed |
In this work studies on a modification of Cu-based, layered oxides with K2NiF4-type structure are presented concerning formation of cationic nonstoichiometry in the A-sublattice of the parent La2CuO4, as well as an introduction of selected M3+ cations (Sc, Ga, In) at the B-site into La1.9Cu1-xMxO4 and Ni-containing La1.9Cu0.45Ni0.45M0.1O4. It is shown that synthesis of phase-pure La2-xCuO4 can be done with values of x ≤0.1, and in the A-site nonstoichiometric materials further doping with M3+ is also achievable. Formation of solid solutions for M3+-doped samples follows the expected trend, with the widest range observed for the smallest Sc3+ cation, z ≤0.1. Apart from a different structural behavior of the doped oxides at high temperatures, it is documented that the discussed substitution affects strongly the oxygen content (e.g. high concentration of the oxygen vacancies is present in La1.9CuO4-δ), as well as electrical conductivity. This is documented by the high-temperature X-ray diffraction, thermogravimetric, iodometic titration and electrical measurements. Since the compounds possess good transport properties, are stable at elevated temperatures, exhibit moderate thermal expansion and are Co-, Sr- and Ba-free, the proposed doping strategy seems interesting concerning development of the oxygen-transporting membranes based on Cu-containing oxides. For example, 1mm thick La1.9Cu0.9Sc0.1O4-δ membrane was found to deliver 0.37mLcm−2 min−1 oxygen flux at 950°C, a very high value for the K2NiF4-type materials. |
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| title_short |
A-site nonstoichiometry and B-site doping with selected M<ce:sup loc="post">3<ce:hsp sp="0.10"/>+</ce:sup> cations in La<ce:inf loc="post">2-x</ce:inf>Cu<ce:inf loc="post">1-y-z</ce:inf>Ni<ce:inf loc="post">y</ce:inf>M<ce:inf loc="post">z</ce:inf>O<ce:inf loc="post">4-δ</ce:inf> layered oxides |
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Du, Zhihong Niemczyk, Anna Li, Kui Zhao, Hailei Świerczek, Konrad |
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10.1016/j.ssi.2017.12.037 |
| up_date |
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