▎ 摘　　要

NOVELTY - Semi tubular nano tungsten trioxide/graphene complex gas sensitive material, prepared by placing nano tungsten trioxide on graphene oxide surface for in situ growth to form nano tungsten trioxide wrapped graphene semi tubular nano tungsten trioxide/graphene composite material is claimed. USE - The material is used for detecting triethylamine gas (claimed). ADVANTAGE - The material has unique appearance, uniformity, high sensitivity for triethylamine gas, can detect concentration of 1 ppm under room temperature, has sensitivity of 7.86%, has good selectivity. The method uses microwave heating, has short reaction time, and is economical. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing semi tubular nano tungsten trioxide/graphene complex gas sensitive material comprising using improved Hummers method to prepare graphene oxide, then uniformly dispersing graphene oxide in anhydrous ethyl alcohol, then adding tungsten hexachloride and cobalt amide, stirring under magnetic force for 1 hour, transferring solution into a microwave reactor specific reaction tank, using microwave heating, auxiliary magnetic stirring, increasing the temperature to 170-200 degrees C, thermal insulating for 25-40 minutes, naturally cooling to room temperature in a microwave reactor, obtaining precipitate, washing, and drying to obtain complex material; (2) use of semi tubular nano tungsten trioxide/graphene complex gas sensitive material in detecting triethylamine gas; and (3) application of nano tungsten trioxide/graphene complex material comprising regulating complex material with pure water into pulp, coating uniformly with comb-type electrode of alumina-sensitive ceramic piece, and drying in a drying tank at 105 degrees C, aging, and packaging.