Method for preparing water-soluble yellow fluorescent carbon quantum dot by taking bagasse as raw material

Abstract

The invention discloses a method for preparing a water-soluble yellow fluorescent carbon quantum dot by taking bagasse as a raw material. The method comprises the following steps of 1) performing bagasse pretreatment; 2) mixing ultrapure water and glycerol according to the volume ratio of (2-5):1 to obtain a mixed solution for later use; 3) adding the bagasse obtained through pretreatment into the mixed solution obtained in the step 2) to obtain a mixed solution, stirring, putting the mixed solution under a microwave environment and performing microwave treatment to obtain a brown solution; 4) filtering the brown solution to obtain filtrate; 5) dialyzing the filtrate to obtain dialysate; and 6) evaporating the dialysate under the condition of constant temperature to obtain the water-soluble yellow fluorescent carbon quantum dot. The water-soluble yellow fluorescent carbon quantum dot prepared by the method has the advantages of high water solubility, fluorescence stability, high biocompatibility, no pollution and no toxin, and has an important application value in the fields of biomarkers, biosensing, fluorescence probes, anti-fake markers and immunochromatography products.

Description

technical field [0001] The invention belongs to the technical field of fluorescent material preparation, and in particular relates to a preparation method of water-soluble yellow fluorescent carbon quantum dots using bagasse as a raw material. Background technique [0002] In recent years, fluorescent carbon nanomaterials have attracted extensive research by researchers due to their good optical properties and low cellular toxicity. It has good photostability, and has no toxic side ions, is suitable for long-term detection and tracer experiments, and has broad application prospects in biomarkers and analysis and detection. The excellent properties of carbon quantum dots (CQDs), such as hydrophilicity, low cytotoxicity, chemical and photostability, have made them widely concerned and applied in the fields of chemistry, biomedicine, sensing and optoelectronics. [0003] At present, there are two main methods for the preparation of carbon quantum dots: top-down method and bott...

AI Technical Summary

Problems solved by technology

This method often requires strict experimental conditions and special energy sources, the cost is high, and the obtained carbon quantum yield is relatively low

Bottom-up synthesis method, that is, direct synthesis of fluorescent carbon quantum dots by pyrolysis or carbonization of suitable precursors, methods include: combustion method, hydrothermal carbonization method, ultrasonic method, etc., but these methods are often used Non-renewable energy and requires strict post-processing, so it is not conducive to continuous and large-scale production of fluorescent carbon quantum dots

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