| http://www.w3.org/ns/prov#value | - A process for photocatalytically decontaminating a room having an interior defined by enclosing surfaces including vertical walls and a ceiling, comprising:covering at least a part of the enclosing surfaces of said room with a thin film of photocatalytic semiconductor material having a band gap energy; disposing in the room an electric lamp for emitting visible light with sufficient intensity to i
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