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Sulfidized Fe-C nanocomposite powders produced by one-step laser pyrolysis technique

C. FLEACA1,2,* , I. MORJAN1, F. DUMITRACHE1, A.-M. NICULESCU1, A. BADOI1, C. LUCULESCU1, E. VASILE3, G. PRODAN4, L. VEKAS5

Affiliation

  1. National Institute for Lasers. Plasma and Radiation Physics NILPRP, 409 Atomistilor str., Magurele, Bucharest, Romania
  2. "Politehnica" University of Bucharest, Physics Department, 313 Independentei blv., Bucharest, Romania
  3. "Politehnica" University of Bucharest, Faculty of Applied Chemistry and Materials Science, Science and Engineering of Oxide Materials and Nanomaterials Department, 1-7 Gh. Polizu str., Bucharest, Rom
  4. "Ovidius" University of Constanta, 124 Mamaia blv., Constanta, Romania
  5. Romanian Academy, Timisoara Branch, 24 Mihai Viteazul blv., Timisoara, Romania

Abstract

Laser pyrolysis was employed to synthesize iron-based magnetic nanocomposites from fixed Fe(CO)5 and various CS2 vapor flows by using C2H4 as sensitizer. The resulted nanopowders were composed from a mixture of iron-containing phases: metallic, carbides, oxide (maghemite) and sulfide (pyrrhotite). The γFe2O3 was formed after post-synthesis air exposure, the highest oxygen content being found in the powder obtained from the lowest CS2 flow. TEM images reveal aggregates of core-shell nanoparticles (7-25 nm in size) for the sample with the highest sulfur content, whereas chained particles (15-30 nm) with empty core/porous shell morphology was observed for those with the lowest sulfur content..

Keywords

Fe-based core-shell nanocomposites, Pyrrhotite, Laser pyrolysis, Magnetism.

Citation

C. FLEACA, I. MORJAN, F. DUMITRACHE, A.-M. NICULESCU, A. BADOI, C. LUCULESCU, E. VASILE, G. PRODAN, L. VEKAS, Sulfidized Fe-C nanocomposite powders produced by one-step laser pyrolysis technique, Optoelectronics and Advanced Materials - Rapid Communications, 9, 7-8, July-August 2015, pp.933-936 (2015).

Submitted at: June 10, 2014

Accepted at: June 24, 2015