Method for quickly preparing carbon quantum dots emitting blue light and carbon quantum dots emitting green light

Abstract

The invention relates to a method for quickly preparing carbon quantum dots emitting blue light and carbon quantum dots emitting green light. According to the method, an environmentally-friendly hydrothermal synthesis method is adopted, L-ascorbic acid and ethidene diamine serve as raw materials, deionized water serves as solvent, the carbon quantum dots emitting the blue light and the carbon quantum dots emitting the green light are formed by quick synthesis of the L-ascorbic acid at different temperatures, the purity of products reaches 99%, the water solubility reaches 99.5%, the particle diameter of the carbon quantum dots emitting the blue light is smaller than or equal to 6 nm, the particle diameter of the carbon quantum dots emitting the green light is smaller than or equal to 6.2 nm, and the carbon quantum dots are good in dispersity, good in water solubility, good in fluorescence, capable of being applied to fluorescence probes, biomedical imaging, printing inks and photovoltaic devices; the preparation method is advanced in process, precise and detailed in data, high in preparation speed, good in product purity and stable in light-emitting performance and is a very ideal method for quickly preparing the carbon quantum dots emitting the blue light and the carbon quantum dots emitting the green light.

Description

technical field [0001] The invention relates to a rapid preparation method of carbon quantum dots emitting blue light and green light, and belongs to the technical field of rapid preparation and application of blue light and green light carbon quantum dots. Background technique [0002] Fluorescent carbon nanomaterials have good application prospects due to their unique optical properties, low toxicity and good biocompatibility. Carbon quantum dots are the most important fluorescent carbon materials in fluorescent carbon nanomaterials, and their morphology is zero. Dimensional nanoparticles, similar in size to quantum dots, smaller than 10nm. [0003] Ordinary quantum dot materials mostly contain heavy metal elements, which are highly toxic; carbon quantum dots, as a fluorescent nanomaterial, mainly contain carbon, which is one of the most abundant elements in nature, so the cost of carbon quantum dots is relatively low ; Carbon quantum dots have down-conversion and up-conv...

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Problems solved by technology

[0003] Ordinary quantum dot materials mostly contain heavy metal elements, which are highly toxic; carbon quantum dots, as a fluorescent nanomaterial, mainly contain carbon, which is one of the most abundant elements in nature, so the cost of carbon quantum dots is relatively low ; Carbon quantum dots have down-conversion and up-conversion fluorescence properties, good chemical stability, good biocompatibility and low toxicity, and have broad application prospects in biological imaging, medical diagnosis, catalysis and photovoltaic devices; currently synthetic carbon There are many methods for quantum dots, but most of them have complex preparation process, long cycle, low product purity, and many disadvantages

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