Nanocomposites and nanomaterials
The post-carbonisation stage of carbon materials synthesis as a factor influencing its thermal stability
Povazhnyi V.A., Pertko O.P., Melnychuk O.V.
Department of catalytic synthesis, V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the NAS of Ukraine, Murmanska st., 1, Kyiv-94, 02094, Ukraine.
E-mail: vladpovazhnyi@hotmail.com

Carbon materials are widely used as catalysts [1, 2] and catalyst supports with metal addition [3] in many industrially important processes. The combination of specific properties (resistance to abrasion, dimensional and thermal stability and specific adsorption properties etc.) makes synthetic carbon materials (SCM) attractive and competitive compared to activated carbons (AC) [4]. This encourages research into improving existing SCM and creating new ones.
The thermal stability of nanostructured SCM produced by template synthesis according to an improved method (with an additional post-carbonization stage) has been investigated. The comparison was carried out with natural AC as well as with and without metal addition.
It has been shown that an additional post-carbonisation step in SCM synthesis helps to reduce amount of defects and increase their thermal stability compered with AC. This makes them promising for replacing activated carbons in liquid-phase reactions. The presence of metal in the samples tested (irrespective of their nature) negatively affects their thermostability by catalysing oxidation. The dependence of thermal stability on the amount of metal applied is antibat.
Thus, the proposed method for the synthesis of carbon material makes it possible to increase the thermal stability of carbon catalysts or to correct it for metal-containing carbon catalysts.

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