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Substrate-free one-step synthesis method of yellow green solid carbon dots

A yellow-green, matrix-free technology, used in chemical instruments and methods, nanocarbons, luminescent materials, etc., can solve the problems of cumbersome synthesis steps of solid carbon dots, and achieve the effects of low cost, broad application prospects and excellent fluorescence properties.

Active Publication Date: 2022-05-27
WUHAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, propose a method for synthesizing yellow-green solid carbon dots in one step without a substrate, and solve the technical problems in the prior art that the synthesis steps of solid carbon dots are cumbersome and need to introduce a matrix

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  • Substrate-free one-step synthesis method of yellow green solid carbon dots
  • Substrate-free one-step synthesis method of yellow green solid carbon dots
  • Substrate-free one-step synthesis method of yellow green solid carbon dots

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Embodiment 1

[0028] Dissolve 1 mmol of resorcinol in 10 mL of absolute ethanol, ultrasonically treat it for 25 min at an ultrasonic frequency of 160 W, add 1 mL of m-xylylenediamine after it is completely dissolved, continue to ultrasonicate for 10 min, and then transfer the mixed solution into 25 mL of polytetrafluoroethylene. The vinyl fluoride reactor was lined, put into a stainless steel reactor, put into an electric heating blast drying oven, and reacted at 200°C for 6 hours. After the reaction is completed, the reaction kettle is naturally cooled to room temperature, and the supernatant liquid after the reaction is taken out; the supernatant liquid obtained after the reaction is subjected to suction filtration using a 0.22 μm filter membrane to remove impurities such as large particles, and then the solution is introduced. Naturally volatilized in the petri dish to obtain solid luminescent yellow-green carbon dots.

[0029] see figure 1 , figure 1 The optical images of the solid ca...

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Abstract

The invention discloses a method for substrate-free one-step synthesis of yellow green solid carbon dots. The method comprises the following steps: dissolving a precursor of a carbon source and a doped nitrogen source in absolute ethyl alcohol, and carrying out ultrasonic treatment until the precursor and the doped nitrogen source are completely dissolved to obtain a mixed solution A; performing solvothermal reaction on the mixed solution A to obtain a reaction solution B; cooling the reaction solution B to room temperature, taking out supernate, and filtering the supernate to obtain a carbon dot solution C; and drying the carbon dot solution C to obtain the yellow green solid carbon dots. Resorcinol is used as a precursor of a carbon source, m-xylylenediamine is used as a doped nitrogen source, solvothermal reaction is adopted, only the synthesized carbon dot solution needs to be naturally volatilized subsequently, modification treatment and matrix introduction in the later period are not needed, a subsequent separation process is not needed, and expensive and complex equipment is not needed, so that the solid-state luminous carbon dots can be obtained; and large-scale popularization and application can be realized.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a method for one-step synthesis of yellow-green solid carbon dots without a matrix. Background technique [0002] Since its first discovery in 2004, carbon dots have been widely used in bioimaging, drug delivery and many other specific properties due to their low toxicity, environmental friendliness, low cost, photoluminescence tunability, good biocompatibility and stability and many other specific properties. , sensing detection, optoelectronic devices and photocatalysis and other fields. [0003] At present, the luminescence of carbon dots can be divided into solution luminescence and solid-state luminescence. However, in many reports, most of the Cdots exhibit solution luminescence, because the fluorescence quenching phenomenon caused by aggregation and sedimentation is common in the drying process of Cdots. Therefore, the lack of luminescent carbon dots in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65B82Y20/00B82Y40/00C01B32/15
CPCC09K11/65B82Y20/00B82Y40/00C01B32/15C01P2004/04C01P2004/64
Inventor 龚晓李久荣吴云徽徐晴晴
Owner WUHAN UNIV OF TECH
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