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This photocatalytic reactor generates the oxidant in the form of hydroxyl radicals and valence band holes by exposing silica-titania composite particles with a barium ferrite core to ultraviolet light. The magnetic core of the catalyst allows for separation, confinement, and agitation. ...In addition, fixed magnets strategically placed above the reactor confines the catalyst to where it receives maximum UV exposure. The composite catalyst, irradiated by an 8-watt 254 nm lamp, was able to decrease the 10 mg/L initial phenol concentration by an average of 92.2% after one hour.