Nitrogen-doped fluorescent carbon quantum dot and preparation method and application thereof

Abstract

The invention discloses a nitrogen-doped fluorescent carbon quantum dot and a preparation method and application thereof, and belongs to the technical field of material science. Fish wastes (such as fish scales, bones and skins) are cleaned, then hydrothermal reaction is directly performed to obtain nitrogen-doped fluorescent carbon quantum dot aqueous dispersion, and finally filtration, dialysis and freeze-drying are performed to obtain nitrogen-doped fluorescent carbon quantum dot solid. The size of the nitrogen-doped fluorescent carbon quantum dot prepared by using the preparation method disclosed by the invention is smaller than or equal to 10nm, the nitrogen content is smaller than or equal to 20 percent, the surface of the quantum dot has nitrogen-containing and oxygen-containing functional groups, and the quantum efficiency is 17-30 percent. The nitrogen-doped fluorescent carbon quantum dot and the preparation method and application thereof have the advantages that the preparation method is environmental-friendly, the operation is simple, the requirements on equipment are low, the preparation method is suitable for large-scale production, and the prepared nitrogen-doped fluorescent carbon quantum dot has excellent fluorescent performance and can be widely applied to fields such as photoelectric materials, biological imaging and fluorescent probes.

Description

technical field [0001] The invention belongs to the technical field of material science, and relates to a nitrogen-doped fluorescent carbon quantum dot and its preparation method and application, in particular to a nitrogen-doped fluorescent carbon quantum dot sourced from fish waste and applied to hypochlorite ions detection. Background technique [0002] Quantum dots are quasi-zero-dimensional nanomaterials composed of a small number of atoms, with a size between 1-100nm. Internal electron movement is strongly restricted in three dimensions, so it is also called artificial atom. Quantum dots have many unique properties due to their special size structure, such as quantum confinement effect, surface effect and quantum tunneling effect, etc., which can be used as a new type of fluorescent material in molecular biology, cell biology, biochemistry, biological It has a wide range of applications in medicine, proteomics and other fields. At present, traditional semiconductor ...

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Problems solved by technology

Obviously, the above-mentioned methods for synthesizing doped carbon quantum dots all involve problems such as time-consuming, complicated process or the use of non-environmentally friendly reagents, which are not conducive to large-scale preparation.

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