Mechanochemical synthesis of nanostructured metal nitrides, carbonitrides and carbon nitride: a combined theoretical and experimental study
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Authors
Organisational units
External Organisational units
- Department of Chemical Engineering, Birjand University of Technology
- UHasselt, Institute for Materials Research (IMO-IMOMEC)
- Ferdowsi University of Mashhad
- Leibniz Institute for Solid State and Materials Research, Dresden
- Erich Schmid Institute of Materials Science
Abstract
Nowadays, the development of highly efficient routes for the low cost synthesis of nitrides is greatly growing. Mechanochemical synthesis is one of those promising techniques which is conventionally employed for the synthesis of nitrides by long term milling of metallic elements under a pressurized N2 or NH3 atmosphere (A. Calka and J. I. Nikolov, Nanostruct. Mater., 1995, 6, 409–412). In the present study, we describe a versatile, room-temperature and low-cost mechanochemical process for the synthesis of nanostructured metal nitrides (MNs), carbonitrides (MCNs) and carbon nitride (CNx). Based on this technique, melamine as a solid nitrogen-containing organic compound (SNCOC) is ball milled with four different metal powders (Al, Ti, Cr and V) to produce nanostructured AlN, TiCxN1−x, CrCxN1−x, and VCxN1−x (x ∼ 0.05). Both theoretical and experimental techniques are implemented to determine the reaction intermediates, products, by-products and finally, the mechanism underling this synthetic route. According to the results, melamine is polymerized in the presence of metallic elements at intermediate stages of the milling process, leading to the formation of a carbon nitride network. The CNx phase subsequently reacts with the metallic precursors to form MN, MCN or even MCN–CNx nano-composites depending on the defect formation energy and thermodynamic stability of the corresponding metal nitride, carbide and C/N co-doped structures.
Details
Original language | English |
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Pages (from-to) | 12414-12424 |
Number of pages | 11 |
Journal | Physical chemistry, chemical physics : PCCP |
Volume | 2017 |
Issue number | 19 |
DOIs | |
Publication status | Published - 19 Apr 2017 |