Abstract: A material, and filters and other structures exposed to flowing gas that have the material therein, which removes VOCs, such as formaldehyde, from the gas. The material is a porous sorbent impregnated by a metal oxide, such as manganese oxide (MnOx) nano particles. The sorbent may be activated carbon, and the manganese oxide may catalyze formaldehyde to water and carbon dioxide while the carbon may adsorb formaldehyde, both mechanisms of which remove the VOC from the air to prevent or reduce inhalation of the same by humans. The material may be combined with an untreated sorbent or sorbent treated with ionic alkaline salts.

Abstract: A composite filter media having excellent dust-releasing properties provided with a first layer of non-woven synthetic fibers having one outer surface hot calendered to increase smoothness and carrying a coating of a hydrophobic material which lowers surface tension and at least a second layer of non-woven synthetic fibers laminated to the downstream side of said first layer. A backing layer may be included to provide additional support to the first and second layer if desired. The second layer may include an electrostatic charge to increase filter efficiency at a reduced pressure drop across the composite media.