Thermal and structural studies of carbon coated Mo2C synthesized via in-situ single step reduction-carburization

Carbon coated nano molybdenum carbide (Mo 2 C) has been synthesized at 800 °C through single step reduction route using molybdenum trioxide (MoO 3 ) as a precursor, polypropylene (P.P) as a carbon source and magnesium (Mg) as a catalyst in an autoclave. The synthesized samples were characterized by...

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Bibliographic Details
Published in:Scientific reports 2017-06, Vol.7 (1), p.1-12, Article 3518
Main Authors: Mir, Rameez Ahmad, Sharma, Piyush, Pandey, Om Prakash
Format: Article
Language:English
Subjects:
140/146
639/301/357
639/925/357
Carbon
Carbon sources
Decomposition
Humanities and Social Sciences
Magnesium
Molybdenum
multidisciplinary
Photoelectron spectroscopy
Polypropylene
Scanning electron microscopy
Science
Science (multidisciplinary)
Size distribution
Spectroscopy
Surface chemistry
Thermal analysis
Thermal decomposition
Transmission electron microscopy
X-ray diffraction
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Summary:Carbon coated nano molybdenum carbide (Mo 2 C) has been synthesized at 800 °C through single step reduction route using molybdenum trioxide (MoO 3 ) as a precursor, polypropylene (P.P) as a carbon source and magnesium (Mg) as a catalyst in an autoclave. The synthesized samples were characterized by X-ray diffraction (XRD), thermal analysis techniques (TG/DTA/DTG), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). Williamson- Hall (W-H) analysis has been done to estimate various parameters like strain, stress and strain energy density. Multi-stage kinetic analysis of the product phase has been studied to establish the nature of the thermal decomposition. Coats-Redfern method applied to determine the mechanism involved in the decomposition of the product phase shows that initial and final stage follow F1 mechanism whereas middle stage follow F3 mechanism. The activation energy ( E a ) and pre-exponential factor ( A ) has also been determined. The morphological studies shows that the particles have partially spherical/faceted shape, with carbon coated having wide particle size distribution. The surface chemistry and surface area analysis were studied by X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmet-Teller (BET), respectively. The formation mechanism of carbon coated Mo 2 C nano particles has been predicted based on the XRD, TG/DTA & DTG and microstructural results.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-017-03197-8