1.High photocatalytic efficiency 2.Excellent purification efficiency 3.High sterilizing efficiency 4.Lasting ... as air purifier, air-conditioning system,car filter , waste gas treatment....etc.2. Comprehensiveness: Photocatalyst can greatly decompose formaldehyde, benzene,toluene, ... , car air-purifying systems, workshop ventilators and industrial waste gas treatment systems, with satisfactory effects