Title: The aim of the present work was to an interaction of N2O and CO on TiO2 (Hombifine N, anatase, mean particle size d = 6 nm) un
Author: Hasan
Last saved by: mikhail
Company: Photonics

Specialization: 010700/03 Condensed Matter Physics
Program: 23 Photonics of heterogeneous systems and condensed matter 
Program director: prof. V. K. Ryabchuk
Department of Photonics
Scientific advisors: prof. A. A. Lisachenko, R. V. Mikhaylov
Reviewer: Ph. D. А.V. Rudakova

Investigation of photostimulated interaction of CO and N_2O 
on TiO_2 (Hombifine N) surface
K. V. Nikitin

Earlier it was shown in our laboratory that a photoreaction CO+NO+hν→N_2+CO_2 (1) on TiO_2 (Degussa P-25 and Hombifine N) under UV as well as VIS (λ > 400 nm) irradiation takes place. It was found that N_2 appears on the second stage (after NO photoadsorption) and its release occurs via intermediate N_2O remaining on the surface. 
The aim of the present work was to investigate an interaction of N_2O and CO on TiO_2 (Hombifine N) under visible irradiation. The mass-spectrometry and thermo-programmed desorption (TPD) spectroscopy were applied.
It is found that N_2O rapidly adsorbs on TiO_2 surface forming a set of weakly bonded species. The irradiation in N_2O causes the redistribution in adsorbed layer resulting in occupation of most bonded ones, meanwhile no N_2 appears in gaseous. The irradiation in mixture N_2O+CO is accompanied by N_2 appearance similarly to that observed in the second stage of reaction (1), while CO_2 remains on the surface. Peak of CO_2 appearing in subsequent TPD obeys to the second-order kinetic of desorption. The ratio of formed N_2 and CO_2 is established. The use of N-doped TiO_2 allowed establishing the roles of photogenerated electrons and holes in reaction (1).

The list of the publications
1. Glazkova N., Nikitin K.. The investigation of routes of the reaction NO + CO + hν → ½ N_2 + CO_2 on TiO_2 (Hombifine N) under visible irradiation.// CONFERENCE ABSTRACTS. International Student Conference “Science and Progress”. SPb.: SOLO, 2011. P. 99.
2. Nikitin K., Glazkova N.. The investigation of interaction of N_2O and CO on VIS irradiated TiO_2 (Hombifine N) surface. CONFERENCE ABSTRACTS. International Student Conference “Science and Progress”. SPb.: SOLO, 2011. P. 115.
3. A. A. Lisachenko, R. V. Mikhaylov, N. I. Glazkova, K. V. Nikitin. Investigation of the features of the reaction CO+NO+hν→1/2N_2+CO_2 on TiO_2 Hombifine N under visible light irradiation.// 7th European Meeting on Solar Chemistry and Photocatalysis: Environmental Applications.
4. R. V. Mikhaylov, N. I. Glazkova, K. V. Nikitin. Investigation of the features of the reaction CO+NO+hν→1/2N_2+CO_2 on TiO_2 Hombifine N under visible light irradiation.// The 3-rd International Symposium «MOLECULAR PHOTONICS» dedicated to academician A.N. Terenin.