At present, formaldehyde scavenging / trapping materials used in the market have many defects, such as low scavenging efficiency, poor material selectivity, secondary pollution and so on. The team at the material Innovation workshop of the University of Liverpool designed and synthesized molecular cage materials. Each molecule has several functional groups that capture formaldehyde. The total formaldehyde adsorption capacity of this material is about 800 times higher than the current active carbon materials, and it still has good thermal stability after capturing formaldehyde, even at high temperature or high humidity, it will not release formaldehyde again, effectively avoiding secondary pollution. This technology has been successfully granted a US patent (wo2016174468 A1) and supported by the start-up fund of the engineering and Natural Sciences Research Council (EPSRC) of the UK.