White fluorescent carbon dot and preparation method thereof

Abstract

The invention relates to a preparation method of a white fluorescent carbon dot. The preparation method comprises the following steps: S1, preparing a precursor I; S2, preparing a precursor II; S3, preparing a precursor III; S4, preparing a carbon dot; and S5, preparing the white fluorescent carbon dot. The invention also discloses the white fluorescent carbon dot prepared by the preparation method of the white fluorescent carbon dot. The preparation method of the white fluorescent carbon dots is simple and feasible, has a high preparation efficiency and a high finished product qualified rate,and has high economic values, high social values, high ecological values and high promotion and application values; and the prepared white fluorescent carbon dot has the advantages of low toxicity, good biocompatibility, high fluorescence intensity, high storage stability and high fluorescence quantum yield, and effectively solves the technical problems that quantum dots are difficult to dope andwhite fluorescent carbon dot is difficult to prepare in the prior art.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a white fluorescent carbon dot and a preparation method thereof. Background technique [0002] In recent years, quantum dots, as the latest carbon material, have attracted the favor of nanomaterial researchers because of their excellent optical properties and low biological toxicity. Quantum dots exhibit excellent properties such as hydrophilicity, low cytotoxicity, chemical and photostability, etc., making them widely concerned and applied in the fields of chemistry, biomedicine, sensing and optoelectronics. [0003] The preparation of quantum dots is an important topic in the field of carbon materials research. At present, there are two main categories: bottom-up methods and bottom-up methods. In addition, the doping of heterocyclic elements can change the energy band structure and surface functional group structure of quantum dots to a large extent, which in turn leads...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of white fluorescent carbon dot and preparation method thereof in order to overcome the deficiencies in the prior art, the method is simple and easy, the preparation efficiency and finished product pass rate are high, economic value, social value, ecological value and popularization and application High value; the prepared white fluorescent carbon dots have low toxicity and good biocompatibility, high fluorescence intensity, stable storage and high fluorescence quantum yield, which effectively solves the difficulty of quantum dot doping in the existing technology, and the white Technical Problems of Difficult Preparation of Fluorescence

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