Preparation method of photoluminescent carbon dots

Abstract

The invention relates to the field of chemistry and nano materials, in particular to a preparation method of photoluminescent carbon dots. Milk and deionized water are uniformly mixed in any proportion and then are poured into a reaction kettle, the reaction kettle is placed in a drying oven, the mixture has a hydrothermal reaction, the reaction kettle is taken out and cooled to the room temperature after the reaction is completed, and a brown yellow aqueous solution disperse system is obtained; the brown yellow aqueous solution disperse system is left to stand, a supernatant containing the photoluminescent carbon dots is subjected to centrifugal separation, obtained solids are washed by deionized water, and an aqueous solution containing the uniformly dispersed photoluminescent carbon dots is obtained. The preparation method is simple to operate, green and environment-friendly, and the obtained photoluminescent carbon dots can be widely applied to the fields of a nanotechnology, drug delivery, biological detection, photovoltaic conversion and catalysis and the like.

Description

technical field [0001] The invention relates to the fields of chemistry and nanometer materials, in particular to a method for preparing photoluminescent carbon quantum dots. Background technique [0002] Due to the unique surface effect, small size effect, macroscopic quantum tunneling effect and quantum confinement effect, nanomaterials exhibit unique properties in terms of light, electricity, magnetism, heat, mechanics, and machinery, and have become a hot spot in material science research. Carbon nanomaterials such as fullerenes, carbon nanotubes, and graphene have become the focus of nanoscience research in recent years because of their unique properties (Shaojun Guo and Shaojun Dong. Graphene nanosheet: synthesis, molecular engineering, thin film, hybrids, and energy and analytical applications. Chem. Soc. Rev., 2011, 40, 2644-2672). In recent years, carbon quantum dots (Carbon dots, CDs) have become a new research hotspot in the fields of biosensing and imaging. Pho...

AI Technical Summary

Problems solved by technology

Top-down methods include arc discharge, laser cutting, electrochemical oxidation, etc., which are characterized by exfoliating carbon materials into carbon nanoparticles by chemical or physical methods, and improving their luminous efficiency through further surface modification; bottom-up The methods include thermal decomposition of organic matter, template method and hydrothermal method, etc., which have the advantages of simple operation, the obtained quantum dots are amorphous, and the quantum efficiency is low.

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