Abstract: The present invention relates, inter alia, to the use of porous crystalline solids constituted of a metal-organic framework (MOF) for the selective adsorption of aldehyde volatile organic compounds. The MOF solids of the present invention can be used for the improved purification of dry or humid air, and for the manufacture of regenerable filters for air purification, particularly leak-free regenerable air filters.

Abstract: A device that includes at least one generator of ionized particles such as negative oxygen ions with a view to making breathed air more healthy. In order to regularize the generation of the ions, the device includes a grid-shaped structure made up of conductive segments at the mouths of the generators.