▎ 摘　　要

NOVELTY - Graphene oxide quantum dots/oxygen-doped porous carbon nitride/graphene oxide ternary aerogel photocatalyst obtained by (i) using melamine as a raw material, performing calcination in an air atmosphere to obtain massive carbon nitride, ultrasonically dispersing the obtained carbon nitride in water, hydrothermally reacting, cooling after the reaction, carrying out the solid-liquid separation, collecting the precipitate, drying the precipitate and grinding into a powder to obtain oxygen-doped porous carbon nitride, (2) ultrasonically dispersing the graphite oxide in water to obtain a graphene oxide nano-sheet dispersion 1, adding concentrated nitric acid and concentrated sulfuric acid, heating and refluxing reaction, cooling to room temperature, then adding a pH adjuster to adjust the pH of the dispersion to 7-9, finally filtering the mixture through a 0.22 mu m microporous membrane and further dialyzing in a dialysis bag to obtain a graphene oxide quantum dot dispersion. USE - Used as graphene oxide quantum dots/oxygen-doped porous carbon nitride/graphene oxide ternary aerogel photocatalyst. ADVANTAGE - The method: has high efficiency and mildness and is environmentally friendly. DETAILED DESCRIPTION - Graphene oxide quantum dots/oxygen-doped porous carbon nitride/graphene oxide ternary aerogel photocatalyst obtained by (i) using melamine as a raw material, performing calcination in an air atmosphere to obtain massive carbon nitride, ultrasonically dispersing the obtained carbon nitride in water, hydrothermally reacting, cooling after the reaction, carrying out the solid-liquid separation, collecting the precipitate, drying the precipitate and grinding into a powder to obtain oxygen-doped porous carbon nitride, (2) ultrasonically dispersing the graphite oxide in water to obtain a graphene oxide nano-sheet dispersion 1, adding concentrated nitric acid and concentrated sulfuric acid, heating and refluxing reaction, cooling to room temperature, then adding a pH adjuster to adjust the pH of the dispersion to 7-9, finally filtering the mixture through a 0.22 mu m microporous membrane and further dialyzing in a dialysis bag to obtain a graphene oxide quantum dot dispersion, (3) ultrasonically dispersing the oxygen-doped porous carbon nitride in water, adding the graphene oxide quantum dot dispersion, stirring and mixing the mixture to carry out the reaction, separating the solid matter to collect the precipitate after the completing reaction, washing and drying the precipitate to obtain graphene oxide quantum dots/oxygen-doped porous carbon nitride, (4) dispersing the graphene oxide quantum dots/oxygen-doped porous carbon nitride in water to obtain a graphene oxide quantum dot/oxygen-doped porous carbon nitride dispersion, dispersing the graphite oxide in water to obtain a graphene oxide nano-sheet dispersion 2, adding the graphene oxide quantum dot/oxygen-doped porous carbon nitride dispersion liquid to the graphene oxide nanosheet dispersion 2, mixing the ultrasonic solution to obtain a mixed solution, adding ethylenediamine to the resulting mixture, performing a heating reaction, after the reaction for a certain period of time, adding cetyltrimethylammonium bromide, performing the heating reaction again, and cooling to room temperature to obtain a graphene oxide quantum dot/oxygen-doped porous carbon nitride/graphene oxide hydrogel, and (5) immersing the hydrogel obtained in the in water, and finally freeze-drying to obtain a graphene oxide quantum dot/oxygen-doped porous carbonitride/graphene oxide ternary aerogel photocatalyst.