Vol. 21, issue 06, article # 15

pdf Zakharenko V. S., Abdulin I. R. Photochemical activity of some complex oxides - phase components of tropospheric aerosol. // Atmospheric and oceanic optics. 2008. V. 21. No. 06. P. 483-485.
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Powdered samples of complex oxides (potassium niobates of the layered structure) were obtained by high temperature synthesis and subsequent grinding. Action spectra of photoinduced processes were determined over potassium niobates of the different phase composition for water and water-organic systems. It is shown that oxygen formation is caused by its photodesorption and is observed under illumination near the red boundary of intrinsic absorption band region. Hydrogen is formed as a result of photocatalytic dehydrogenation of residual adsorbed organic compounds, whereas photocatalytic decomposition of water does not occur. The quantum efficiency of photocatalytic dehydrogenation increases by an order of magnitude after adding the mixture of a hydrogen-containing organic compound to the reaction.