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The photocatalytic activity under UV and visible irradiation of a series of CeO 2 –TiO 2 composite materials prepared by microemulsion and subsequently calcined at 500°C was evaluated using acetaldehyde as a model pollutant. The activities of three composite catalysts containing 2.5, 5 and 25M% of ceria, as well as a nano-titania reference are compared by means of efficiency parameters;...
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