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Carbon nanoparticle with near-infrared light emission characteristic and preparation method and application thereof

A technology of carbon nanoparticles and emission characteristics, applied in the direction of nano-carbon, nanotechnology, nano-optics, etc., can solve the problems of lack, optical absorption characteristics and unsatisfactory biological safety, and achieve good biological safety and high-efficiency light-to-heat conversion Features, low-cost effects

Active Publication Date: 2022-03-18
GUANGDONG QUANTUM MOODY BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a lack of effective methods to prepare carbon nanodots whose main absorption band is in the red band and emit deep red to near-infrared bands.
Moreover, among the only reports on deep-red or near-infrared absorbing / emissive carbon nanodots, these carbon nanodot materials usually exhibit excellent light-to-heat conversion performance in the near-infrared region, but the optical absorption properties and biosafety not ideal

Method used

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  • Carbon nanoparticle with near-infrared light emission characteristic and preparation method and application thereof
  • Carbon nanoparticle with near-infrared light emission characteristic and preparation method and application thereof
  • Carbon nanoparticle with near-infrared light emission characteristic and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 Preparation of Carbon Nanoparticles with Near Infrared Light Emitting Properties

[0036] Dissolve 1g of citric acid and 2g of biuret in 30mL of DMSO solvent to obtain a transparent solution, then place it in a 50mL polytetrafluoroethylene autoclave, react at 160°C for 4 hours, and the reaction pressure is 7Mpa. After filtering, the powdery solid was obtained, and after washing with water, centrifugation (8000rpm, 5min), drying and other processes, a dark blue powder was obtained, which was carbon nanoparticles with near-infrared light emission characteristics.

[0037] The morphology and size of carbon nanoparticles were observed by TEM and AFM, such as Figure 1-Figure 3 As shown, the carbon nanoparticles synthesized in this example have a size of about 1-30 nm and a height of about 1-15 nm.

[0038] Observe the surface elements of carbon nanoparticles and the composition of surface functional groups by EDS and FTIR, such as Figure 4 , Figure 5 As shown...

Embodiment 2

[0039] Example 2 Preparation of Carbon Nanoparticles with Near Infrared Light Emitting Properties

[0040] Dissolve 1g of citric acid and 0.5g of biuret in 30mL of DMSO solvent to obtain a transparent solution, then place it in a 50mL polytetrafluoroethylene autoclave, react at 110°C for 12 hours, and the reaction pressure is 2Mpa, the solution after the reaction The powdery solid was obtained after filtration, and after washing with water, centrifugation (8000rpm, 5min), drying and other processes, a dark blue powder was obtained, which was carbon nanoparticles with near-infrared light emission characteristics.

Embodiment 3

[0041] Example 3 Preparation of Carbon Nanoparticles with Near Infrared Light Emitting Properties

[0042] Dissolve 1g of citric acid and 6g of biuret in 30mL of DMSO solvent to obtain a transparent solution, then place it in a 50mL polytetrafluoroethylene autoclave, react at 220°C for 2 hours, and the reaction pressure is 10Mpa. After filtering, the powdery solid was obtained, and after washing with water, centrifugation (8000rpm, 5min), drying and other processes, a dark blue powder was obtained, which was carbon nanoparticles with near-infrared light emission characteristics.

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Abstract

The invention belongs to the technical field of carbon nano materials, particularly relates to carbon nano particles with near-infrared light emission characteristics and a preparation method and application of the carbon nano particles, and aims to develop a near-infrared carbon nano material which is simple in preparation method, low in process requirement and capable of realizing quantitative production. According to the invention, biuret and / or triuret and a polycarboxyl and / or polyhydroxy compound are dehydrated and carbonized in a polar aprotic solution to prepare the carbon nanoparticles, and the prepared carbon nanoparticles have the characteristics of red light band absorption and near-infrared band luminescence, and also have an efficient photothermal conversion characteristic; the carbon nano particles (including granular or coiled particles) have good biological safety, can be prepared into biological composite preparations, and can be applied to the technical fields of fluorescence biological imaging, tumor photo-thermal therapy, drug carriers, anti-forgery ink and the like; meanwhile, the preparation method is simple, the price is low, and large-scale batch preparation of the carbon nanoparticles is facilitated.

Description

technical field [0001] The invention belongs to the technical field of carbon nanomaterials, and in particular relates to a carbon nanoparticle with near-infrared light emission characteristics and a preparation method and application thereof. Background technique [0002] Carbon Nano Dots (Carbon Nano Dots), also known as carbon nanoparticles, is a carbon nanomaterial that can emit light. Compared with organic dyes and semiconductor quantum dots, it has low molecular weight, small particle size, high fluorescence stability, and no light. It has the advantages of scintillation, wide and continuous excitation spectrum, adjustable emission wavelength, good biocompatibility and low toxicity. It has broad application prospects in the fields of photoelectric materials, photocatalysis, biosensing and bioimaging. [0003] In the field of bioimaging, longer emission wavelengths (e.g., deep red to near-infrared bands) are critical for imaging objects in vivo because they have strong...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C01B32/15G01N21/64B82Y20/00B82Y40/00
CPCC09K11/65C01B32/15G01N21/64G01N21/6428B82Y20/00B82Y40/00C01P2004/04C01P2002/82C01P2002/01G01N2021/6439Y02A50/30
Inventor 王先玉
Owner GUANGDONG QUANTUM MOODY BIOTECHNOLOGY CO LTD