... Air purify ,enviromental protection and efficient. remove formaldehyde,benzene, remove ammonia and TVO Photocatalyst,photocatalyst filter,photocatalyst ... can function as purifying hazardous organic substances, such as formaldehyde, benzene, ammonia, sulfur dioxide, carbon monoxide, nitric ... released from dead bacteria.3. Deodorization: it can remove odours giving out from smoke, bathroom, rubbish and ...