| abstract |
Treatment of aqueous liquid containing organic contaminants comprises contacting the liquid with a material comprising a semiconductor photocatalyst loaded on a molecular sieve material, irradiating the liquid to cause photocatalysis and simultaneous exposure to ultrasound energy. The semiconductor photocatalyst is preferably a titania, and the molecular sieve material may be mesoporous and/or a zeolite. Zinc oxide, cadmium sulfide, iron oxide, gallium phosphide, tin oxide and tungsten oxide may also be used a photocatalysts. Composite photocatalysts and processes for their preparation are also described. |