一种氮掺杂碳量子点及其制备方法与应用
Nitrogen-doped carbon quantum dots were prepared by a hydrothermal method using betaine hydrochloride and ethylenediamine as raw materials. This method solved the problems of large particle size and high detection limit of existing carbon quantum dots when detecting copper ions, and enabled rapid, sensitive and low-cost detection of copper ions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HEBEI UNIVERSITY
- Filing Date
- 2024-05-17
- Publication Date
- 2026-07-17
AI Technical Summary
Existing carbon quantum dots have problems with large particle size and high detection limit in detecting copper ions, making it difficult to achieve rapid, accurate and specific detection.
Nitrogen-doped carbon quantum dots were prepared by a one-step, environmentally friendly hydrothermal method using betaine hydrochloride as the carbon source and ethylenediamine as the nitrogen source. The particle size was approximately 7.40 nm, and the fluorescence emission wavelengths were located at 456 nm and 520 nm, exhibiting excellent selectivity and sensitivity.
It enables rapid and sensitive detection of copper ions with a detection limit as low as 4.9 nmol/L, and emits light stably within the pH range of 3-11. It is simple to operate, low in cost, and requires minimal equipment, making it suitable for the detection of practical samples.
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Figure CN118580857B_ABST