This article is cited in 9 papers

Amorphous, glassy, porous, organic, microcrystalline semiconductors, semiconductor composites

Study of spin centers in nanocrystalline titanium dioxide with a high degree of photocatalytic activity

E. A. Konstantinova^ab, V. Ya. Gayvoronsky^c, V. Yu. Timoshenko^a, P. K. Kashkarov<sup>ab

a</sup> Lomonosov Moscow State University, Faculty of Physics
^b National Research Centre "Kurchatov Institute", Moscow
^c Institute of Physics, National Academy of Sciences of Ukraine, Kiev

Abstract: Electron spin resonance spectroscopy is used to study the effects of illumination and changes in temperature on spin centers in nanocrystalline anatase powders synthesized by sol-gel methods with various complexing agents. A correlation between the concentration of oxygen radicals at the surface and the rate of photocatalytic decomposition of organic compounds in the presence of TiO$_2$ is observed. It is shown that the concentration of centers active in the electron spin resonance spectra can be used for monitoring the photocatalytic activity of TiO$_2$.

Received: 13.01.2010
Accepted: 18.01.2010

 English version: Semiconductors, 2010, 44:8, 1059–1063

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