Various embodiments provide systems and methods for leveraging transaction processing data to identify areas or subject matters of interest to consumers, e. or more in the presence of oxygen as pretreatment, before adhering zeolite seed crystals to a surface of the porous body; storing the porous body under an environment of humidity of 30% or more for 12 hours or more after the heat treatment; and subsequently adhering the zeolite seed crystals to the porous body. 1 to 20% by mass on the basis of the total mass of the composite material.