Chemical Vapor Synthesis and Characterization of Manganese Oxides
- Chemical Vapor Synthesis and Characterization of Manganese Oxides
- 르; 진성민; 박은석; 레 투이 린; 배귀남; 정종수
- Manganese Oxides; Chemical Vapor Synthesis; catalyst; specific surface area; nanoparticle; Characterization
- Issue Date
- Chemical vapor deposition : CVD
- VOL 17, NO 7-9, 228-234
- Manganese oxide nanoparticles are synthesized by a chemical vapor process using manganese(0) carbonyl as the precursor. The
synthesis temperature of the materials is varied from 500 to 1500 ℃ at 200 ℃ intervals. These nanomaterials are characterized
by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) surface
area, and X-ray photoelectron spectroscopy (XPS). XRD shows that the manganese oxide nanoparticles synthesized at
500, 700 – 1100, 1300, and 1500 ℃ are mainly MnO2, Mn2O3, Mn2O3/Mn3O4, and Mn3O4, respectively. The TEM and BET
results also confirm that the particle size is on the nanometer scale with a large specific surface area (SSA) of 81 – 215㎡ g-1.
XPS indicates the catalysts to have manganese oxidation states of (2+), (3+), or (4+) depending on the synthesis temperature.
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