A preparation method of highly stable carbon dots-silica composite particles

A technology of silica and composite particles, applied in chemical instruments and methods, material excitation analysis, fluorescence/phosphorescence, etc., can solve problems such as deviation of test results and affect the accuracy of test results, achieve uniform size and improve luminescence stability , the effect of simplifying the tedious process
CN109679646BInactive Publication Date: 2021-08-03JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JILIN UNIV
Publication Date
2021-08-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for preparing highly stable carbon dot-silicon dioxide composite particles of the present invention belongs to the technical field of carbon materials and fluorescent composite nanomaterials. Firstly, quaternary ammonium base is used as catalyst and doped carbon source, and TEOS is used as silicon source to synthesize spherical silica nanoparticles doped with quaternary ammonium base; Fluorescent carbon dots are formed by in-situ dehydration condensation in the silicon oxide matrix, and carbon dot-silica fluorescent composite nanoparticles are obtained. The preparation process of the invention is simple, and the prepared composite particles have the advantages of uniform size, photobleaching resistance, high chemical stability, good biocompatibility and easy surface modification, etc., and can be used as a universal fluorescent reference material and other fluorescent materials Composite construction of dual-emission ratiometric fluorescent probes.
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Description

technical field

[0001] The invention belongs to the technical field of carbon materials and fluorescent composite nanomaterials, and specifically relates to a highly stable carbon dot with silicon dioxide as the matrix and quaternary ammonium alkali as the doped carbon source, which can be easily and efficiently synthesized by high-temperature calcination with adjustable emission wavelength- The method of silica fluorescent composite particles, and its application to the construction of dual-emission colorimetric fluorescent probes. Background technique

[0002] As a new type of fluorescent material, carbon dots have attracted extensive attention due to their excellent optical properties, low toxicity, water solubility, chemical inertness and biocompatibility, and have been widely used in optical devices, biological imaging, photocatalysis and fluorescence transmission. senses etc. Carbon dots have become a promising alternative fluorescent material to traditional organic d...

Claims

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