Effectively decompose volatile compounds like methyl aldehyde, ethanethiol etc Based on technology of lanthanon nano cold-catalyst, which effectively decompose volatile compounds like methyl aldehyde, ethanethiol etc without energy of heat or light. Under normal temperature, the decomposition rate for methyl aldehyde is over 90% and over 95% for ethanethiol.; Anti-bacteria rate for colibacillus and Staphylococcus aureus is over 95%. the catalyst component will be constant, which can be used for long time without regeneration. Can be washable and the effect after washing will not decrease. Mainly applied in household air condition, central air condition, air purifier, heating fan, air-conditioner fans, humidifier etc.