Molybdenum dioxide and vanadium-doped molybdenum dioxide microcrystals in a polymer container

Alexandra C. Pavel, Dwight K. Romanovicz, John McDevitt

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Molybdenum dioxide and vanadium-doped molybdenum dioxide microcrystals were synthesized by a totally new method involving a redox-active monomer route. The two related dioxides had virtually identical crystal structures and the three precursors used in the process could be subsequently divided in two subgroups of two members each, based on their strong similarities in composition and crystal structure, respectively, Molybdenum trioxide (orthorhombic and hexagonal forms) and the vanadium-doped (10%, molar) molybdenum trioxide (hexagonal form) were used in the redox process with excess pyrrole, and at relatively high temperature (325°C) and long reaction time (12 days), formed a heterogeneous new type of organic-inorganic microcomposite. The new material could be described as a molybdenum dioxide crystal in a polymer box, with the size of the crystallite grain depending on the dimensions of the initial molybdenum trioxide grain and the ratio between the unit cell volumes of the initial and final oxide. The procedure took advantage of the relatively high reduction potentials of the Mo 6+ and V 5+ oxide surface centers towards the oxidative polymerization of pyrrole at intermediate temperatures, and the high catalytic activity of the metal cations in the molybdenum trioxide-based materials towards the total oxidation of the carbon atoms in the organic moiety, at elevated temperatures. This new synthetic route offers good perspectives as precursor composites for nanocrystal engineering in practical applications like heterogeneous catalysis, chemical sensing, nanostructured metallic catalysts, etc.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium Proceedings
EditorsC. Sanchez, U. Schubert, R.M. Laine, Y. Chujo
Pages551-556
Number of pages6
Volume847
StatePublished - 2005
Event2004 Materials Research Society Fall Meeting - Boston, MA, United States
Duration: Nov 29 2004Dec 2 2004

Other

Other2004 Materials Research Society Fall Meeting
CountryUnited States
CityBoston, MA
Period11/29/0412/2/04

Fingerprint

Vanadium
Microcrystals
Molybdenum
Containers
Polymers
Pyrroles
Oxides
Crystal structure
Nanocrystals
Temperature
Catalysis
Cations
Catalyst activity
Carbon
Monomers
Metals
Polymerization
Atoms
Oxidation
Crystals

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Pavel, A. C., Romanovicz, D. K., & McDevitt, J. (2005). Molybdenum dioxide and vanadium-doped molybdenum dioxide microcrystals in a polymer container. In C. Sanchez, U. Schubert, R. M. Laine, & Y. Chujo (Eds.), Materials Research Society Symposium Proceedings (Vol. 847, pp. 551-556). [EE13.46]

Molybdenum dioxide and vanadium-doped molybdenum dioxide microcrystals in a polymer container. / Pavel, Alexandra C.; Romanovicz, Dwight K.; McDevitt, John.

Materials Research Society Symposium Proceedings. ed. / C. Sanchez; U. Schubert; R.M. Laine; Y. Chujo. Vol. 847 2005. p. 551-556 EE13.46.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Pavel, AC, Romanovicz, DK & McDevitt, J 2005, Molybdenum dioxide and vanadium-doped molybdenum dioxide microcrystals in a polymer container. in C Sanchez, U Schubert, RM Laine & Y Chujo (eds), Materials Research Society Symposium Proceedings. vol. 847, EE13.46, pp. 551-556, 2004 Materials Research Society Fall Meeting, Boston, MA, United States, 11/29/04.
Pavel AC, Romanovicz DK, McDevitt J. Molybdenum dioxide and vanadium-doped molybdenum dioxide microcrystals in a polymer container. In Sanchez C, Schubert U, Laine RM, Chujo Y, editors, Materials Research Society Symposium Proceedings. Vol. 847. 2005. p. 551-556. EE13.46
Pavel, Alexandra C. ; Romanovicz, Dwight K. ; McDevitt, John. / Molybdenum dioxide and vanadium-doped molybdenum dioxide microcrystals in a polymer container. Materials Research Society Symposium Proceedings. editor / C. Sanchez ; U. Schubert ; R.M. Laine ; Y. Chujo. Vol. 847 2005. pp. 551-556
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