▎ 摘　　要

NOVELTY - A wallpaper comprises 15-20 pts. wt. amino-modified diatomaceous earth, 3-4 pts. wt. graphitic carbon nitride-reduced graphene oxide catalyst loaded with manganese dioxide, 20-30 pts. wt. adhesive, 0.4-0.5 pt. wt. sodium polyacrylate, 0.02-0.03 pt. wt. defoaming agent, 0.05-0.06 pt. wt. carboxymethyl cellulose, 0.6-0.8 pt. wt. seaweed glue, 0.04-0.05 pt. wt. dioctyl phthalate, 0.2-0.5 pt. wt. nano-zinc oxide, 0.3-0.4 pt. wt. copper oxide, and 40-50 pts. wt. deionized water. The defoaming agent is SN-154 (silicone-free defoamer) or 1410 (silicone emulsion). The adhesive is vinyl acetate ethylene adhesive, 2011 adhesive (epoxy adhesive), or polyvinyl acetate adhesive. USE - Wallpaper for photocatalytic synergistic decomposition of formaldehyde. ADVANTAGE - The photogenerated electron-hole pairs are effectively separated, so that the decomposition of formaldehyde is promoted and the decomposition performance of formaldehyde is improved. When the light is weak and at night, the formaldehyde forms hydrogen bonds with the hydroxyl groups on the surface of manganese dioxide and is adsorbed on the surface of manganese dioxide, and the active oxygen on the surface of manganese dioxide oxidizes the formaldehyde into formate, carbonate and carbon dioxide in sequence. When the light is strong, the synergistic catalysis is formed with graphitic carbon nitride-reduced graphene oxide to improve the catalytic performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of wallpaper, involves orderly adding amino-modified diatomaceous earth, graphitic carbon nitride-reduced graphene oxide catalyst loaded with manganese dioxide, sodium polyacrylate, defoaming agent, carboxymethyl cellulose, seaweed glue, adhesive, dioctyl phthalate, nano-zinc oxide and copper oxide to deionized water, and stirring for 60-90 minutes to obtain coating, and applying coating thorough the coating process to obtain a final product.