Preparation method of functionalized graphene quantum dots

A technology of quantum dots and fossils, applied in the field of preparation of functionalized graphene quantum dots, can solve the problems of inability to functionalize quantum dots, strong oxidant pollution, uncontrollable and other problems, and achieve good antioxidant activity and electrochemical activity, biological phase Good capacitance and controllable functional groups
CN112479192AInactive Publication Date: 2021-03-12WENZHOU MEDICAL UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
WENZHOU MEDICAL UNIV
Publication Date
2021-03-12
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a preparation method of functionalized graphene quantum dots. A strategy of preparing hydroxyl functionalized graphene quantum dots in one step by using a mechanical force chemical reaction is adopted. Multi-walled carbon nanotubes and potassium hydroxide are selected as reaction raw materials, a high-energy ball milling method is utilized to enable the multi-walled carbonnanotubes and potassium hydroxide to be subjected to a mechanical chemical reaction in the ball milling process, and in cooperation with the added potassium hydroxide, during ball milling, ionic bondscan be broken to generate hydroxyl radicals, so that carbon atomic nuclei are attacked, and the carbon nanotubes are promoted to be stripped into graphene quantum dots, and the carbon nanotubes are combined to the quantum dots to form hydroxylated graphene quantum dots, and the hydroxylated graphene quantum dots are prepared in one step; the method is green, safe, simple, convenient and easy to operate, the hydroxyl-functionalized graphene quantum dots can be prepared in one step at normal temperature and normal pressure, and the prepared graphene quantum dots are uniform in size, controllable in functional group, good in biocompatibility, high in yield and good in repeatability, and the fluorescence characteristic, the antioxidant activity and the electrochemical activity are good.
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Description

technical field

[0001] The invention specifically relates to the technical field of graphene quantum dots, in particular to a preparation method of functionalized graphene quantum dots. Background technique

[0002] The existing preparation methods of graphene quantum dots are mainly divided into two categories: bottom-up method and top-down method. The bottom-up method refers to the synthesis of graphene quantum dots with different sizes and functional groups from small molecular compounds by hydrothermal and solvothermal methods. The advantage is that the structure of the prepared graphene quantum dots is relatively tunable and controllable through the selection of the precursors. However, the graphene quantum dots prepared by the bottom-up method often contain some small molecular compounds that are not fully reacted, and it is difficult to purify them completely. The top-down method uses strong oxidant oxidative exfoliation, mechanical exfoliation and other methods to ...

Claims

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