▎ 摘　　要

NOVELTY - Method for preparing graphene oxide-bismuth oxychloride composite catalyst involves (a) ultrasonically dispersing graphene oxide in ethanol to obtain a mixed solution, slowly adding polyvinylpyrrolidone, in which the mass ratio of graphene oxide to polyvinylpyrrolidone is 1:(5-20), dispersing, centrifuging to remove the supernatant and redispersing with the ethanol, (b) dissolving bismuth(III) nitrate pentahydrate in a mannitol solution in a mass ratio of (1-4):1, magnetically stirring and dispersing, (c) mixing the obtained two solutions, adding saturated sodium chloride solution and stirring for 20-40 minutes, in which the mass ratio of mannitol to sodium chloride is 1:(1-3), and (d) hydrothermally heating the mixed solution in hydrothermal kettle at 120-180 degrees C for 2-4 hours, centrifuging at 6000-8000 rpm, washing with ethanol and deionized water for 2-4 times and drying in blast drying box at 40-80 degrees C to obtain the product, where the composite catalyst contacted with (001) surface. USE - The method is useful for preparing a graphene oxide-bismuth oxychloride composite catalyst, which is useful in oxidation and removal of volatile organic compounds driven by low-temperature plasma, preferably oxidatively degrading toluene polluting gas molecules under the action of low-temperature plasma (all claimed). ADVANTAGE - The catalyst has toluene removal efficiency of 60.08%, and generates highly oxidizing active species under excitation of high-energy electrons.