N, S-doped carbon quantum dots based on choline ionic liquid and preparation method thereof

An ionic liquid, carbon quantum dot technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of weak fluorescence intensity, uneven particle size distribution, poor stability, etc.
CN112779007AInactive Publication Date: 2021-05-11SHENYANG AGRI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHENYANG AGRI UNIV
Publication Date
2021-05-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses N, S-doped carbon quantum dots based on a choline ionic liquid and a preparation method thereof. A choline ionic liquid and a thiobetaine compound are mainly used as raw materials, carbon quantum dots are rapidly prepared by adopting a high-temperature cracking and chemical oxidation method, and the high-purity N, S-doped carbon quantum dots can be obtained after ultrasonic treatment, centrifugation, filtration, dialysis and freeze drying. The preparation method disclosed by the invention is simple and rapid, the raw materials are not easy to volatilize and environment-friendly, and the prepared carbon quantum dots have the advantages of uniform particle size distribution, high fluorescence intensity and good stability and have a good development prospect in rapid analysis and detection.
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Description

technical field

[0001] The invention relates to a preparation method of carbon quantum dots, in particular to an N, S doped carbon quantum dot based on choline ionic liquid and a preparation method thereof. Background technique

[0002] Carbon quantum dots (carbon quantum dots, CQD) is a carbon-based zero-dimensional material. Carbon quantum dots have the characteristics of excellent optical properties, good water solubility, environmental friendliness and good biocompatibility, and also have the advantages of wide source of raw materials for preparation and low synthesis cost. Carbon quantum dots currently have good application prospects in biological imaging, environmental monitoring, fluorescent probes, catalyst preparation, detection of heavy metals, organic pollutants, and pesticide residues.

[0003] Since carbon quantum dots were first discovered, a variety of preparation methods of carbon quantum dots have been reported, which are divided into two categories: "top-d...

Claims

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