We introduce ourselves as one of the professional Nano-titanium dioxide ( Nano-TIO2 & Photocatalyst) manufacture, we specialized in produce nano-TiO2, photocatalyst liquid, photocatalyst filter and photocatalyst air purifier and other eco-friendly product. The following is the introduction for photocatalytic filters: Zixilai photocatalytic filters are made with self-developed nano-TiO2 photocatalyst using state-of-the-art technologies to evenly spread nano-TiO2 particles over the surface of filters made of different materials. Nano-TiO2 photocatalyst uses UV light, sunlight or fluorescent light to excite the electrons from the valence band to the conduction band to yield holes in the valence band and generate highly-oxidizing hydroxyl radicals, superoxide anion radicals and superoxide hydroxyl radicals, which can oxidize and decompose poisonous and harmful pollutants such as formaldehyde, benzene, toluene, dimethylbenzene, ammonia and TVOC, odors and bacteria into harmless CO2 and H2O. The product has good air-purifying and wide-spectrum sterilizing effects. It can effectively purify air and prevent cross-infection of bacteria and viruses. If you would like to know more information please kindly contact me by zixilai (at) hotmail (dot) com