Carbon quantum dot preparation method

Abstract

The invention discloses a carbon quantum dot preparation method. The preparation method comprises the following steps: firstly, weighing H2O2 and ultrapure water; then weighing oxidized graphene; stirring the three ingredients; evenly mixing to obtain a solution; transferring the solution into a polytetrafluoroethylene lining of a high-pressure kettle; well sealing a stainless steel outer shell; putting into an oven to perform heating treatment at 160 to 200 DEG C and thus obtaining corresponding carbon quantum dots after 12 to 36 h. The carbon quantum dot preparation method disclosed by the invention has the characteristics of simple operation method, short reaction time, moderate required condition and the like; the purpose of quickly producing high-quality carbon quantum dots in a largescale is achieved under the low energy consumption condition. The carbon quantum dots prepared by the carbon quantum dot preparation method disclosed by the invention have the advantages of uniform size and high fluorescence quantum yield. The method is suitable for large-scale industrial production of the high-quality carbon quantum dots.

Description

Technical field [0001] The invention relates to the technical field of functional materials, in particular to a method for preparing carbon quantum dots. Background technique [0002] Carbon quantum dots are a new type of carbon-based zero-dimensional material. Carbon quantum dots have excellent optical properties, good water solubility, low toxicity, environmental friendliness, wide source of raw materials, low cost, good biocompatibility and many other advantages. Since carbon quantum dots were first discovered, people have developed many Synthesis methods include arc discharge method, laser ablation method, electrochemical synthesis method, chemical oxidation method, combustion method, hydrothermal synthesis method, microwave synthesis method, template method, etc. Carbon quantum dots are widely used and have good application prospects in many fields such as medical imaging technology, environmental monitoring, chemical analysis, catalyst preparation, and energy development. ...

AI Technical Summary

Problems solved by technology

The early preparation methods of carbon quantum dots often use arc method, laser method and microwave method, etc., but the operation of these methods is relatively complicated, the requirements for equipment are high, the process is complicated, and the cost is relatively high

Although some chemical methods have been reported to prepare carbon nano-quantum dots recently, these methods are mainly prepared from biomass raw materials, and there are few methods for converting existing carbon materials into carbon quantum dots and carbon nanomaterials

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