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Aerosol‐Assisted Synthesis of Porous TiN x O y @C Nanocomposites
Author(s) -
Maurice Vincent,
Clavel Guylhaine,
Antonietti Markus,
Giordano Cristina
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201503768
Subject(s) - tin , crystallization , materials science , nanocrystalline material , porosity , amorphous solid , nitride , chemical engineering , carbon fibers , nanocrystal , ceramic , aerosol , amorphous carbon , nitrogen , nanocomposite , nanoparticle , metal , mineralogy , nanotechnology , metallurgy , composite material , crystallography , chemistry , organic chemistry , layer (electronics) , composite number , engineering
Porous TiN x O y ‐based particles were synthesized by an aerosol spray process. At first, the starting sol solution containing the metal precursor and the nitrogen source is sprayed to form an aerosol that is subsequently pyrolysed at different temperatures. The obtained dried particles are an amorphous coordination “polymer” rich in carbon and nitrogen. These “glassy” particles are finally thermally treated at 800 °C, promoting the crystallization of the particles and the release of a major part of the carbon. As the particles keep their original shape, carbon loss and density increase during the crystallization step and lead to the development of an accessible pore structure. The process was analyzed and extended to the synthesis of other metal nitrides, such as VN and W 2 N, thereby showing its general validity for the production of functional nanocrystalline nitride ceramics with high porosity still occupying a relatively small volume, and otherwise not easily accessible.