نتایج جستجو برای: solid state synthesis

تعداد نتایج: 1385659  

Journal: :Chemistry of Materials 2021

Low-temperature synthesis routes are necessary for selectively synthesizing many metastable solid-state materials. Here, we identify a cooperative effect that starting materials have in lowering temperatures metathesis reactions by studying the formation of yttrium manganese oxide. Previous studies shown YMnO3 can be synthesized ternary with an alkali halide being produced as secondary product....

In this paper, we have focused on the preparation and characterization of copper oxide nanoparticles by solid state thermal decomposition of copper(I) iodide in the presence of thiosemicarbazone ligands without the need for a catalyst, employing toxic solvent, template or surfactant and complicated equipment, which makes it efficient, one-step, simple and environment-friendly. CuO nanoparticles...

Nanostructured Ni2As2O7 semiconductor samples were synthesized by a solid state method among As2O3 and Ni(NO3)2.6H2O raw materials at 650 °C (S1) and 750 °C (S2) as reaction temperatures. The synthesized nanomaterials were characterized by powder X-ray diffraction (PXRD) technique and F...

Spinel MgAl2O4  nanopowders were synthesized by one-step solid state reactions using Al(NO3)3.9H2O and MgSO4 raw materials at stoichiometric 1 : 2, Mg : Al molar ratio at a constant reaction temperature of 1000 ºC for 8 h (S1), 10 h (S2) and  24 h (S3). The synthesized materials were characterized...

In this study, mononuclear octahedral cobalt(III) Schiff base complex [CoL3], L = (5-bromo-2-hydroxybenzyl-2-furylmethyl)imine, was synthesized from the reaction of Co(NO3)2•6H2O and the Schiff base ligand L in methanol as solvent. It used as a new precursor to prepare spinel type cobalt oxide nanoparticles by a facile solid-state thermal decomposition. Controlling the temperature and time, Co3...

Journal: :iranian journal of environmental sciences 0
nikhil rastogi department of physics, school of sciences, iftm university, moradabad, up, india indu singh department of physics, school of sciences, iftm university, moradabad, up, india

indoor radon and thoron have been measured in the houses ofmoradabad district, uttar pradesh india, by means of solid state nuclear trackdetectors. radon, an invisible radioactive gas, occurs naturally in indooratmospheres and along with thoron is the most important contribution of humanexposure to natural sources. radon exists in soil gas building materials and indooratmosphere to name but a f...

2013
V. Massarotti G. Flor A. Marini R. Riccardi Riccardo Riccardi

The formation reaction of Mg2Mo30n from MgO (single crystal) and M 0 O 3 (pellet) has been investigated in the temperature range 873—973 K. Supported by an analysis of the transport properties a mechanism is proposed involving a unidirectional transport of Mo6+ via V„0 and of oxygen via gas phase. The transport properties of MgMo04 (the other intermediate compound in the system MgO — M 0 O 3 ) ...

2003
M. A. VILLA GARCIA

Solid-state reactions of elemental sulfur with metallic cobalt and molybdenum powders were used to synthesize model catalysts for hydrodesulfurization (HDS). The resulting materials had a general stoichiometry of CozlMo,-,S2 with x between 0.025 and 0.3. The solid phases formed during synthesis and after exposure to typical HDS reaction conditions were identified by X-ray diffraction and select...

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