Abstract
TiO2-Ag nanoparticles with thermal and chemical stability, wide band gap and low toxic are more used photocatalysts for decomposition of organic substances. However, high rate of recombination of electron-hole pairs and high energy of photoactivation significantly limit their usage. Modification of TiO2 with silver promotes surface separation of charges and increases their photochemical activity. In the present study for obtain TiO2-Ag bicomponent nanoparticles was use electric explosion of metal wires in atmosphere 85 vol.% Ar - 15 vol.% O2. This method has a high productivity (170-200 g/h) which is enough for industrial application of nanoparticles. However, electroexplosive nanoparticles are mostly agglomerates with a size of 200-500 nm, which significantly reduces their photochemical activity in the test reaction of decomposition of the model dye methylene blue under the visible light radiation. Ultrasonic treatment of nanoparticles in aqueous suspension for 15 min. contributed to an increase in the photoactivity of TiO2-Ag nanoparticles by 10%
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