▎ 摘　　要

NOVELTY - The preparation of graphene catalytic network involves dispersing mixture of butyl titanate and sodium tungstate in ethanol solution, and dispersing to obtain solution (A), dripping into ice water, dripping acetic acid, and leaving still to obtain heteropoly acid-doped titanium dioxide gel, adding with graphene, heating, evaporating solvent to dryness, and calcining to obtain graphene-loaded heteropoly acid-doped titanium dioxide, pulverizing to obtain catalyst powder, mixing with high-temperature adhesive, spraying on PTFE fiber filter mesh, and high-temperature treating. USE - Preparation method of graphene catalytic network for catalytic oxidation of municipal wastewater (claimed). ADVANTAGE - The method enables preparation of graphene catalytic network which effectively reduces the ammonia nitrogen content in wastewater. DETAILED DESCRIPTION - The preparation method of graphene catalytic network involves (A) dispersing 8 pts. wt. mixture of butyl titanate and sodium tungstate in 100 pts. wt. 95 vol.% ethanol solution, high-speed stirring, and dispersing to obtain solution (A), dripping the solution (A) into 80 pts. wt. ice water, controlling the temperature of ice water at 3-5 degrees C during dripping, increasing the temperature to 20-25 degrees C, dripping 3 pts. wt. acetic acid, stirring for 10-20 minutes, and leaving still for 3-5 days to obtain heteropoly acid-doped titanium dioxide gel, (B) adding 25 pts. wt. graphene to heteropoly acid-doped titanium dioxide gel, heating at 80-90 degrees C, heat-preserving for 1-2 hours, evaporating the solvent to dryness, placing in a high temperature sintering furnace, and calcining at 300-600 degrees C under high temperature nitrogen atmosphere to obtain graphene-loaded heteropoly acid-doped titanium dioxide, and (C) pulverizing the graphene-loaded heteropoly acid-doped titanium dioxide to particle size of 3-5 microns to obtain catalyst powder, mixing the catalyst powder with high-temperature adhesive, spraying on PTFE fiber filter mesh, where the thickness of the coating film is 1-2 microns, and high-temperature treating. An INDEPENDENT CLAIM is included for use of graphene catalytic network in catalytic oxidation of municipal wastewater.