Premium
Shape diversity in particles obtained by low temperature pyrolysis of ferrocene
Author(s) -
Koprinarov N.,
Konstantinova M.
Publication year - 2011
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201100006
Subject(s) - ferrocene , magnetite , scanning electron microscope , carbon fibers , materials science , particle (ecology) , pyrolysis , chemical engineering , crystallography , particle size , analytical chemistry (journal) , chemistry , composite material , organic chemistry , metallurgy , electrochemistry , composite number , oceanography , electrode , engineering , geology
Synthesis experiments, made in a hermetically closed steel container through pyrolytical decomposition of various mixtures like ferrocene and xylene; ferrocene and water; ferrocene, xylene and water in different ratios have resulted in emergence of different in shape particles. The necessary for the realization of each experiment temperature increases linearly with 20 K/min up to the needed temperature and decreases mostly with no delay with a cooling rate of 30 K/min down to room temperature. The obtained particles are shaped as spheres, entirely or partially finished octahedrons or resemble stars. The spheres are perfect in shape and consist of pure incompletely graphitisized carbon. The octahedron and star‐like shaped particles, synthesized in the presence of ferrocene as precursor, have magnetite nuclei and carbon coating. Particle morphology has been examined by Scanning (SEM) and Transmission Electron Microscopy (TEM) and their chemical composition and crystal structure by the means of X‐ray diffraction (XRD), Mössbauer spectroscopy and Electron Probe X‐ray Micro Analysis and Energy Dispersive X‐ray Spectrometry (EDS). Based on the results obtained it has been concluded that the synthesized particle morphology depends on the simultaneous proceeding magnetite crystal growing and crystal coating with partially graphitisized carbon deposit. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)