... and efficient. remove formaldehyde,benzene, remove ammonia and TVO Photocatalyst,photocatalyst filter,photocatalyst filter for range hood and air conditionFunctions1. Air purification: it ... foam substrate of photocatalyst filter net, aluminium substrate of photocatalyst filter net, nickel substrate of photocatalyst filter net, unwoven fabric substrate of photocatalyst filter net.Shapes: porous ...