III International Conference

PP-II-100sp 2 -carbon samples (Sibunit, OLC, CFC). More complex effect of Sibunit, OLC and CFC wasrevealed in case on phenol oxidation. No influence or minor acceleration was observed forhigh Н 2 О 2 concentration (0.7 M, C PhOH /C Н2О2 =1/70) and t= 30 0 C. Deceleration wasmonitored for lower concentration of Н 2 О 2 (0.2 M, C PhOH /C Н2О2 =1/20) and t=50 o C.ConclusionsAll types of carbon samples are inactive or low-active to oxidation of both phenol andethanol in absence of iron. Presence of sp 3 -carbon slows down oxidation as phenol as ethanolcatalyzed by Fe 3+ . It is possibly due to surface oxygenate species behaving as a free radicalscavenger. sp 2 - carbon can both decelerate free-radical oxidation and to accelerate itdepending on reaction conditions. Acceleration apparently is caused by ability to transferelectron due to π-conjugation in graphene layer [7].AcknowledgementsThis research was supported by the Russian Foundation of Basic Research (grants05-03-22004, 05-03-32995, 06-03-32969).References1. Toledo L.C., Silva A.C.B., Augusti R., Lago R.M., Chemosphere, 50 (2003), 1049-1054.2. Ince N.H., Apikiyan I.G., Wat.Res., 34 (2000), 4169-4176.3. Austin, J.M., Groenewald, T., Spiro, M. (1980). JCS, Dalton, 854-859.4. Lücking F., Köser H., Jank M., Ritter A., Wat. Res. 32 (1998), 2607-2614.5. Ryazantsev, A.A., Batoeva, A.A., Zhalsanova, D.B. (1999). Patent Russian FederationNo. 2135419.6. Georgi, A., Kopinke, F.-D. (2005). Applied Catalysis B: Environmental, 58, 9–18.7. Toles C.A., Marshal W.E., Johns M.M., Carbon, 37 (1999), 1207-1214.8. Strelko V.V., Kartel N.T. et al., Surface Science, 548 (2004), 281-290.347