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X-Ray Diffraction and Scanning Electron Microscopy Studies of Molybdenum Trioxide Prepared by Thermal Oxidation of Electrodeposited Molybdenum Sulfide

Published online by Cambridge University Press:  28 February 2011

Daniel BÉLanger ,
Guylaine Laperriere  and
Michel Preda
Daniel BÉLanger
Affiliation:
Département de Chimie, Université du Québec à Montréal, C.P. 8888, succursale "A", Montréal (Québec), Canada, H3C 3P8
Guylaine Laperriere
Affiliation:
Département de Chimie, Université du Québec à Montréal, C.P. 8888, succursale "A", Montréal (Québec), Canada, H3C 3P8
Michel Preda
Affiliation:
Département de Science de la terre, Université du Québec à Montréal, C.P. 8888, succursale "A", Montréal (Québec), Canada, H3C 3P8
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Abstract

Scanning electron microscopy and X-ray diffraction have been used to characterize the transformation of electrodeposited molybdenum trisulfide thin film and powder to molybdenum trioxide. Scanning electron microscopy shows that the formation of molybdenum trioxide is accompanied by an enhancement of the surface area of the film as the relatively smooth molybdenum trisulfide is converted to molybdenum trioxide displaying a platelet structure. X-Ray diffraction revealed that amorphous molybdenum sulfide is converted to polycrystalline molybdenum oxide upon heating in air above 400°C. The observed diffraction peaks obtained when molybdenum sulfide was heated at 400°C for 15 min. correspond fairly well with those of orthorhombic molybdenum trioxide. However, when the molybdenum sulfide powder was heated at 400°C for a period of only about 2 min., additional diffraction peaks were observed. The latter can be attributed to monoclinic molybdenum dioxide.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 210: Symposium L – Solid State Ionics II , 1990 , 399
Copyright
Copyright © Materials Research Society 1991

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