A kind of phosphorus-doped graphene quantum dot and its electrochemical preparation method

Abstract

The invention provides a phosphorus-doped graphene quantum dot and an electrochemistry preparing method thereof. According to the preparing method, phosphorus-contained macromolecular organic compounds soluble in water are selected to serve as electrolytes, through controlled potential electrolyzing, phosphorus oxygen bonds are broken, phosphorus atoms are separated from the macromolecular organic compounds to enter the interior of the graphene quantum dot, carbon phosphorus bonds and the phosphorus oxygen bonds are formed, doping is completed, and the phosphorus-doped graphene quantum dot with the higher doping concentration content is prepared; the quantum dot has the good cleaning-up effect on hydroxyl radicals, and through ESR energy spectrum test, the clearing-up rate of the hydroxyl radicals can reach 78.49%; the method is easy and convenient in the operation process, the whole preparing process is conveniently planed as a whole, strong oxidizing acid or strong reducing agents are not used, and certain commercial feasibility is achieved; and graphene precursor which is rich in reserving and friendly to environment is adopted to replace expensive materials of graphite oxide, carbon nano-tubes and the like, and the method is hopefully and widely applied in the biomedical field.

Description

technical field [0001] The invention belongs to the field of free radical scavenging, and in particular relates to a phosphorus-doped graphene quantum dot and an electrochemical preparation method thereof. Background technique [0002] Free radicals, also known as "free radicals" in chemistry, refer to atoms or groups with unpaired electrons formed by the breaking of covalent bonds in the molecules of compounds under external conditions such as light and heat. In the metabolic reaction of the human body, an appropriate amount of free radicals can transmit energy and kill harmful bacteria, but when the free radicals are excessive, they will interfere with the normal operation of cells, accelerate cell aging, and cause various diseases. In today's society, with the development of industry, the pollution of the environment, the increase in the pressure of life and other reasons, people have more and more opportunities to be exposed to free radicals, such as inferior cosmetics, ...

AI Technical Summary

Problems solved by technology

The advantage of this method is that the output is large and the design is simple. The disadvantage is that a large number of dangerous strong acids and strong oxidants are used in the operation process, and the size of the prepared graphene quantum dots is often not uniform.

In the process of preparing doped graphene quantum dots, the hydrothermal method only relies on the oxidation potential of the strong oxidant to promote the breaking of old chemical bonds and the formation of new chemical bonds. However, the potential of strong oxidizing agents is often constant, and some bonds with strong energy cannot be broken. Therefore, this method can also be successfully prepared in the preparation of graphene quantum dots doped by elements with low doping difficulty, but it is powerless for some elements with high doping difficulty

Images