▎ 摘　　要

NOVELTY - Formaldehyde-removing nano-composite gel comprises 6-12 pts. wt. crystalline flake graphite, 4-9 pts. wt. hydrogen peroxide, 1-5 pts. wt. sodium nitrate, 7-18 pts. wt. concentrated sulfuric acid, 3-9 pts. wt. hydrogen chloride, and 20-35 pts. wt. potassium permanganate. USE - Used as formaldehyde-removing nano-composite gel. ADVANTAGE - The nano-composite gel is capable of efficiently using visible light energy to excite water molecules and oxygen in the air, thus completely decomposing free formaldehyde and other organic pollutants in the air into no harm to the human body, hazardous water and carbon dioxide and efficiently decomposing formaldehyde. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the nano-composite gel, comprising (i) placing concentrated sulfuric acid in the stirring tank, and placing crystalline flake graphite into concentrated sulfuric acid to mix and stir, adding sodium nitrate to continuously mix and stir in the process of mixing; preparing cold water tank, placing the stirring tank into the cold water tank for cooling reaction, adding potassium permanganate to stir and react in the reaction process, so that the solution is mixed; (ii) preparing temperature is 45 degrees C of the warm water tank, the stirring tank into the warm water tank for heating reaction, continuously mixing and stirring operation, then adding de-ionized water to dilute reaction, after diluting to stirring tank is added with hydrogen peroxide and stirring, so that the color of the mixed solution from brown to bright golden color, filtering the solution by the filtering device, then using hydrogen chloride solution to clean filter to obtain solid filter, placing the solid filter in the drying box for vacuum drying operation to obtain the graphene oxide; (iii) placing the graphene oxide solid obtained in step (ii) in the ultrasonic dispersion tank, then adding water to perform ultrasonic dispersion treatment operation, and then centrifuging and separating to obtain dispersed aqueous solution of graphene oxide; (iv) adding polyaziridine into the dispersion aqueous solution of graphene oxide obtained in step (iii), mixing and stirring, then preparing the hot water tank at 80 degrees C temperature, heating and reacting the mixed solution after stirring for 5 hours, obtaining the primary graphene hydrogel; and (v) washing the graphene hydrogel obtained in step (iv) by de-ionized water to remove the redundant impurities in the graphene hydrogel, and then introducing the washed graphene hydrogel into a freeze drier for drying reaction to obtain the final graphene nano composite gel.