The invention discloses a shell-based air purifying material and a preparation method thereof. Raw materials include 100 parts of shell
powder, 60-80 parts of
calcium chloride dihydrate, 30-40 parts of
ammonia water with the concentration of 20%, 180-250 parts of
hydrogen peroxide with the concentration of 30%, 20-80 parts of
gypsum-based gelatinization
powder and 50-180 parts of water. The preparation method comprises the following steps: carrying out pretreatment, in-situ reaction and combination to obtain a powdery material with an air purifying function; adding 0.1-3.5 parts of a reinforcing filler and 0.1-73 parts of a hydration liquid-phase medium into the powdery material, then moulding,
drying, maintaining, and then carrying out finishing treatment, so that powdered granulated, shaped granular or plate-shaped shell-based air purifying material is obtained. The preparation method disclosed by the invention has the advantages that the in-situ reaction is carried out on the shell
powder, so that micro-scale
calcium peroxide is produced in porous channels of the shell powder, the shell powder has the capability of directly oxidizing and decomposing harmful gases such as
formaldehyde, the problems that an existing air purifying material is low in purification rate and poor in purification persistence are solved, and functionality and decorativeness such as self
humidity control, antibacterial and mouldproof properties,
fire resistance, noninflammability, sound absorption and
noise reduction can be achieved.