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Effect of Br-Grafted Multi-Walled Carbon Nanotubes on the Model Oxidative Environment

Eldar Zeynalov1, Joerg Friedrich2, Manfred Wagner2 and Gundula Hidde3
1National Academy of Sciences of Azerbaijan, Institute of Petrochemical Processes, 30, Khojaly Ave., AZ 1025 Baku, Azerbaijan; 2Technical University, Straße des 17 Juni, 135, D-10623 Berlin, Germany 3Federal Institute of Materials Research and Testing (BAM), Unter den Eichen 87, 12205 Berlin, Germany
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Two samples of brominated multi-walled carbon nanotubes [(Br)n-MWCNTs] produced by the plasma-chemical technique were involved in the liquid-phase initiated oxidation of cumene. The powerful catalytic effect of (Br)n-MWCNTs has been confirmed to recommend the substances for the use in oxidation of alkyl aromatic hydrocarbons as active additives. Obviously this phenomenon originates from the peculiarities of electronic configuration of (Br)n-MWCNTs pattern. To elucidate a mechanism of the acceleration action of the functionalized CNTs the model experiment with a single-walled carbon nanotube [(Br)n-SWCNTs] at standard model conditions was conducted. There has been established that Br-groups are consumed during the reaction and (Br)n-CNTs act in the model cumene oxidation as an additional source of free radicals and may be considered as a complementary initiator. The general scheme of oxidation has been proposed and additional initiation rates promoted by (Br)n-MWCNTs have been calculated.

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