Nanodiamond and Nano-Onion-Like Carbon Oxidation Kinetics
Results are given for a study of the effect of treatment temperature on oxidation kinetics of nanodiamond particles. Kinetic models are compared for oxidation by oxygen of nanodiamond powder previously heat treated at different temperatures. It is established that depending on treatment temperature (600 and 1400°C) the kinetic models of oxidation are different. For a specimen treated at 600°C the best model appeared to be two parallel reactions. Oxidation of a specimen heated at 1400°C proceeds according to a model of a single-stage n-th order oxidation reaction. Differences in kinetic models and oxidation reaction kinetic parameters are due to a change in the nature and morphology of specimens, which is connected with nanodiamond transformation into nano-onion-like carbon during heat treatment at a higher temperature.
Keywordsnanodiamond oxidation nano-onion-like carbon
Work was carried out with financial support of the Government of the Russian Federation (Russian Ministry of Education and science) within the scope of measures 1.3 (Agreement for supply of a subsidy of the Russian ministry No. 14.579.21.2008 of 5 June 2014). Resolution of the Russian Government of 9 April 2010 No. 218 “Measures of state support for developing cooperation of Russian higher education establishments and organizations implementing comprehensive projects for creating hi-tech production”. Contract No. 02.G36.31.0006.
The work was carried within the scope of an agreement between FKP Aleksin Chemical Combine and the M. V. Lomonosov Moscow State University on the theme “Development of technology and organization of production for heat-resistant composite press-materials for mass preparation of lightweight complex shapes used in aerospace technology, terrestrial and marine transport” according to a resolution of the RF Government of 9 April 2010 No. 218 “Measures of state support for developing cooperation of Russian higher education establishments and organizations implementing a combined project for creating hi-tech production”. Agreement No. 02.G36.31.0006.
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