▎ 摘　　要

NOVELTY - The mask (100) absorbs oxide graphene to portion of filter filtering agent. The positive ion oxidation graphene binds cationicity polymer or cationic metal ion in the oxide graphene. The filter filtering agent, the oxide graphene, or the porous silica absorbed to the positive ion oxidation graphene. USE - Mask e.g. gas mask, used in home and industrial site, for blocking yellow sand. ADVANTAGE - The mask effectively blocks the ultrafine particle including the fine dust. The bacteria reproduction is suppressed. The hydrophobic environmental toxic material is effectively blocked by the mask which avoids respiratory disease. The air filter is small in size, and is simple in structure. Excellent air cleaning function is achieved. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) an air filter; and (2) a method for manufacturing air filter. DESCRIPTION OF DRAWING(S) - The drawing shows an explanatory view of the mask in which air filter including the oxide graphene is mounted. Mask (100) Bag (110) Main portion of mask (120) Air filter (130)