نتایج جستجو برای: co3o4 nanoparticles
تعداد نتایج: 108045 فیلتر نتایج به سال:
Thanks to their high energy density, light weight and long cycle life, rechargeable lithium ion batteries (LIBs) have become one of the dominant power sources for portable electronic devices. With the growing need for higher capacity and safety, numerous efforts have been made to develop alternative high-performance electrode materials for next-generation LIBs. As an example, the anode electrod...
The synthesis of Co and Ce oxide nanoparticles using precipitation precursor salt solutions in the form microdroplets generated with a nebulizer proved to be an efficient, fast inexpensive method. Different morphologies single oxides particles were obtained. Ceria almost cube-shaped 8 nm average size, forming 1.3–1.5 μm aggregates, whereas cobalt appeared as rounded-edged 37 mainly nanorods 50–...
Bearing in mind the need to develop optimal transition metal oxide-based catalysts for combustion of volatile organic compounds (VOCs), yolk-shell materials were proposed. The constructed composites contained catalytically active Co3O4 nanoparticles, protected against aggregation and highly dispersed a shell made porous SiO2, forming specific type nanoreactor. bottom-up synthesis started with o...
The spinel cobalt oxide Co3O4 is a magnetic semiconductor containing cobalt ions in Co2+ and Co3+ oxidation states. We have studied the electronic, magnetic, and bonding properties of Co3O4 using density functional theory (DFT) at the Generalized Gradient Approximation (GGA), GGA+U, and PBE0 hybrid functional levels. The GGA correctly predicts Co3O4 to be a semiconductor but severely underestim...
Zinc oxide nanopowders doped with 1-15 mol % cobalt were produced by the microwave solvothermal synthesis (MSS) technique. The obtained nanoparticles were annealed at 800 °C in nitrogen (99.999%) and in synthetic air. The material nanostructure was investigated by means of the following techniques: X-ray diffraction (XRD), helium pycnometry density, specific surface area (SSA), inductively coup...
The thermo-optical properties of coated surface are important for spacecraft thermal control coatings which depend on the optical properties and structure of the coating material. These coatings control the temperature by their capability of outer energy absorption and its emission. The optical properties of pigment can be improved if the pigment contains a high fraction of voids in its structu...
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