Search Results - "Köferstein, Roberto"

Synthesis, phase evolution and properties of phase-pure nanocrystalline BiFeO3 prepared by a starch-based combustion method by Koferstein, Roberto

“…•Novel and eco-friendly synthesis for nano BiFeO3 using starch as complexation agent.•Phase evolution depending on calcination and composition of the starting…”
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LaFeO3 and BiFeO3 perovskites as nanocatalysts for contaminant degradation in heterogeneous Fenton-like reactions by Rusevova, Klara, Köferstein, Roberto, Rosell, Mònica, Richnow, Hans H., Kopinke, Frank-Dieter, Georgi, Anett

“…•LaFeO3 and BiFeO3 prepared and tested as catalysts for heterogeneous Fenton reaction.•Nano-crystalline perovskites obtained by implementation of sol–gel…”
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Investigations on Bi25FeO40 powders synthesized by hydrothermal and combustion-like processes by Köferstein, Roberto, Buttlar, Toni, Ebbinghaus, Stefan G.

“…The syntheses of phase-pure and stoichiometric iron sillenite (Bi25FeO40) powders by a hydrothermal (at ambient pressure) and a combustion-like process are…”
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Preparation and characterization of nanosized magnesium ferrite powders by a starch-gel process and corresponding ceramics by Köferstein, Roberto, Walther, Till, Hesse, Dietrich, Ebbinghaus, Stefan G.

“…The synthesis and characterization of nanosized MgFe 2 O 4 by a starch-gel method is described herein. A phase-pure nanosized MgFe 2 O 4 powder ( 1a ) was…”
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Novel magnetoelectric composites of cobalt iron alloy and barium titanate by Walther, Till, Köferstein, Roberto, Ebbinghaus, Stefan G.

“…Magnetoelectric barium titanate ceramics with embedded cobalt iron alloy particles (Co1/3Fe2/3)x–(BaTiO3)(1−x), with x=0.2, 0.4, and 0.6, were prepared by a…”
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Synthesis and characterization of nano-LaFeO3 powders by a soft-chemistry method and corresponding ceramics by Köferstein, Roberto, Ebbinghaus, Stefan G.

“…The preparation of a nano-sized LaFeO3 powder by a soft-chemistry method using starch as complexing agent is described herein. Phase evolution and development…”
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Nanostructure-Related Magnetic Properties of Various Mesoporous Cobalt Oxide and Cobalt Ferrite Spinel Phases by Haffer, Stefanie, Walther, Till, Köferstein, Roberto, Ebbinghaus, Stefan G, Tiemann, Michael

“…Nanostructure-related magnetic properties are investigated systematically for various mesoporous cobalt oxide (Co3O4) and cobalt ferrite (CoFe2O4) spinel…”
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A Novel One-Dimensional Copper Mellitate Complex Featured by {Cu(H2O)2(urea)[C6(COO)4(COOH)2]}n2n- Polyanions by Köferstein, Roberto, Robl, Christian

“…Blue monoclinic single crystals of the novel one‐dimensional [H3N‐(CH2)6‐NH3][Cu(H2O)2(urea)(μ2‐C6(COO)4(COOH)2)]·H2O coordination polymer were prepared in…”
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M2(H2O)[μ10-C6H2(COO)4] (M = Ba2+, Pb2+) - Two Isotypic Three-Dimensional Coordination Polymers with a Layer-like Separation between Anions and Cations by Köferstein, Roberto, Robl, Christian

“…Monoclinic single crystals of Ba2(H2O)[μ10‐C6H2(COO)4] (1) and Pb2(H2O)[μ10‐C6H2(COO)4] (2) were obtained using the silica gel method [space group C2/c (no…”
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Synthesis, Crystal Structure, and Characterization of Two Novel One‐ and Two‐Dimensionally Polymeric Copper(II) Phosphonoacetates by Köferstein, Roberto, Arnold, Michael, Robl, Christian

“…Blue single crystals of Cu[μ2‐OOC(CH2)PO3H]·2H2O (1) and Cu1.5[μ3‐OOC(CH2)PO3]·5H2O (2) were prepared in aqueous solution. In compound 1 [space group C2/c (no…”
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Synthesis, Crystal Structure, and Hydrogen Bonding of μ-Hydroxo-μ-peroxo-bis[bis(ethylenediamine)cobalt(III)] Squarate by Köferstein, Roberto, Robl, Christian

“…Black‐brown needle‐shaped single crystals of [Co2(en)4(O2)(OH)][C4O4]1.5·4H2O (en = ethylenediamine) were prepared in aqueous solution at room temperature…”
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Cover Picture: Synthesis, Crystal Structure, and Characterization of Two Novel One‐ and Two‐Dimensionally Polymeric Copper(II) Phosphonoacetates (Z. Anorg. Allg. Chem. 3/2017) by Köferstein, Roberto, Arnold, Michael, Robl, Christian

“…The cover picture shows sections of the crystal structures of Cu[µ2‐OOC(CH2)PO3H]·2H2O (1) and Cu1.5[µ3‐OOC(CH2)PO3]·5H2O (2). (1) is a layer‐like coordination…”
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Synthesis, Crystal Structure, Hydrogen Bonding, and Thermal Behavior of a Three-Dimensional CuII-benzene-1,2,4,5-tetracarboxylate Templated by 1,9-Diaminononane by Köferstein, Roberto, Robl, Christian

“…Triclinic single crystals of Cu4(H3N–(CH2)9–NH3)(OH)2[C6H2(COO)4]2·5H2O were prepared in aqueous solution at 80 °C in the presence of 1,9‐diaminononane. Space…”
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Synthesis and Crystal Structure of Two CuII-benzene-1,2,4,5-tetracarboxylates with Three-Dimensional Open Frameworks by Köferstein, Roberto, Robl, Christian

“…Two new three‐dimensional frameworks with zeolite‐like channels were prepared in the presence of 1,6‐diaminohexane. Cu1.5(H3N–(CH2)6–NH3)0.5[C6H2(COO)4]·5H2O…”
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Synthesis and characterization of a nano-scaled barium cerate perovskite powder using starch as polymerization agent by Köferstein, Roberto, Hesse, Dietrich, Ebbinghaus, Stefan G.

“…The preparation of nano-sized BaCeO 3 powder using starch as a polymerization agent is described herein. Phase evolution during the decomposition process of a…”
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Photocatalytic activity of CaTaO 2 N nanocrystals obtained from a hydrothermally synthesized oxide precursor by Oehler, Florian, Naumann, Robert, Köferstein, Roberto, Hesse, Dietrich, Ebbinghaus, Stefan G.

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The influence of BaGeO3 on the properties of Ba(Ti1−xSnx)O3 ceramics on the basis of sol-gel powders by Zenkner, Mandy, Köferstein, Roberto, Ebbinghaus, Stefan G., Jäger, Lothar

“…Ba(Ti 1− x − y Sn x Ge y )O 3 (BTSG- x - y ; x  = 0, 0.05; y  = 0–0.05) powders were synthesized by a sol-gel (SG) method and for comparative purposes also by…”
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Shrinkage mechanism and phase evolution of fine-grain BaTiO3 powder compacts containing 10 mol% BaGeO3 prepared via a precursor route by Koferstein, Roberto, Jager, Lothar, Zenkner, Mandy, Muller, Thomas, Abicht, Hans-Peter

“…The shrinkage mechanism of BaTiO3 powder compacts containing 10 mol% BaGeO3, synthesized by a precursor route and a conventional mixed-oxide method, are…”
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Preparation and sintering behaviour of a fine grain BaTiO3 powder containing 10 mol% BaGeO3 by Köferstein, Roberto, Jäger, Lothar, Zenkner, Mandy, Abicht, Hans-Peter

“…The formation of solid solutions of the type [Ba(HOC₂H₄OH)₄][Ti₁₋ₓ Geₓ(OC₂H₄O)₃] as Ba(Ti₁₋ₓ /Geₓ)O₃ precursors and the phase evolution during thermal…”
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Synthesis and characterization of nanoscaled Ba(Ti1-X-YSnxGey)O3 powders and corresponding ceramics by ZENKNER, Mandy, JÄGER, Lothar, KÖFERSTEIN, Roberto, ABICHT, Hans-Peter

“…Nanoscaled Ba(Ti1-x-ySnxGey)O3 (BTSG - x - y, x = 0-0.1, y = 0-0.05) powders were synthesized by a sol-gel method (SG) and, as a reference, coarse powders by a…”
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