Synthesis and characterization of cobalt oxide nanoparticles by using industrial pulp as impregnated precursor
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Cobalt oxide (Co3O4) nanoparticles were prepared using impregnation method associated with the liquid phase synthesis. Cobalt(II) nitrate hexahydrate (Co(NO3)2·6H2O) was used as a starting material, and industrial pulp was used as impregnatedmatrix. As a result of heat treatment of cobalt oxide precursors impregnated with pulp for one hour at a temperature rangeof 380-800 oC, cobalt oxide nanoparticles with a particle size of 100-500 nm were obtained. The crystallization process,morphology, and thermal decomposition were studied as a function of firing temperatures. The synthesized powders wereevaluated by Scanning Electron Microscope(SEM), X-ray diffractometer(XRD), Thermo gravimetric analysis(TG) andDifferential scanning calorimetry(DSC). It is found that the formation of Co3O4 crystal phase is generated at about 380 oC. Thecrystal phase of Co3O4 is maintained to a temperature of about 800 oC, and the size of the crystals has increased as thetemperature increases. This Co3O4 crystal phase was changed to a CoO crystal phase at 900 oC.
Abstract
Cobalt oxide (Co3O4) nanoparticles were prepared using impregnation method associated with the liquid phase synthesis. Cobalt(II) nitrate hexahydrate (Co(NO3)2·6H2O) was used as a starting material, and industrial pulp was used as impregnatedmatrix. As a result of heat treatment of cobalt oxide precursors impregnated with pulp for one hour at a temperature rangeof 380-800 oC, cobalt oxide nanoparticles with a particle size of 100-500 nm were obtained. The crystallization process,morphology, and thermal decomposition were studied as a function of firing temperatures. The synthesized powders wereevaluated by Scanning Electron Microscope(SEM), X-ray diffractometer(XRD), Thermo gravimetric analysis(TG) andDifferential scanning calorimetry(DSC). It is found that the formation of Co3O4 crystal phase is generated at about 380 oC. Thecrystal phase of Co3O4 is maintained to a temperature of about 800 oC, and the size of the crystals has increased as thetemperature increases. This Co3O4 crystal phase was changed to a CoO crystal phase at 900 oC.
참고문헌 (20)
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