Petroleum liquid product-based graphene quantum dot, and preparation method and application thereof

The invention provides a petroleum liquid product-based graphene quantum dot, and a preparation method and an application thereof. The method comprises the steps: adding concentrated sulfuric acid andconcentrated nitric acid to a petroleum liquid product, and carrying out ultrasonic treatment to obtain a petroleum liquid product-based dispersion liquid; stirring the petroleum liquid product-baseddispersion liquid in a reactor, carrying out oxidation reaction, then cooling to room temperature, adjusting to neutral with an alkali, and thus obtaining a petroleum liquid product-based crude product; and centrifuging the obtained petroleum liquid product-based crude product, taking a supernatant, allowing to pass through a microporous filter membrane, carrying out dialysis interception to obtain the petroleum liquid product-based graphene quantum dot. The preparation method is simple, is low in cost, and reduces tedious and redundant steps. The prepared petroleum liquid product-based graphene quantum dot has the ad