Patent ID: 11299671

Abstract:
The present invention provides a preparation method for graphene quantum dots with different oxygen contents, including the following steps: Step 1: dispersing a graphene oxide in a peroxide solution to obtain a graphene oxide dispersion; Step 2: mixing the graphene oxide dispersion with an alkali liquor, purifying to obtain a graphene quantum dot dry powder; Step 3: loading the graphene quantum dots dry powder on a carrier, performing a gradient elution to obtain a plurality of graphene quantum dots with different oxygen contents. The preparation method for graphene quantum dots can realize the control of oxygen content of the graphene quantum dots. Therefore, the control of the emission wavelength of the product is achieved, which provides a reliable premise for applications of the graphene quantum dots in the fields of LED, cell labeling, etc. In addition, the method provided by the present invention is also simple and easy to operate.