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Green preparation method of spinach-based multicolor luminescent carbon quantum dots

A carbon quantum dot and green technology, which is applied in the field of preparation of multi-color luminescent materials, can solve the problem of single luminous wavelength and achieve the effects of wide sources, good dispersibility, improved cost performance and industrial production feasibility

Inactive Publication Date: 2020-11-24
NORTHEAST FORESTRY UNIVERSITY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the existing green synthetic luminescent wavelength is single, the present invention proposes a green method for preparing multicolor luminescent carbon quantum dots

Method used

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  • Green preparation method of spinach-based multicolor luminescent carbon quantum dots
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  • Green preparation method of spinach-based multicolor luminescent carbon quantum dots

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specific Embodiment approach 1

[0033] Specific Embodiment 1: In this embodiment, a green preparation method of multicolor luminescent carbon quantum dots based on spinach is characterized in that: the method is carried out according to the following steps:

[0034] Step 1, chop the spinach, disperse it in an organic solvent, and add reagents for modification; place the mixture in an ultrasonic tank for ultrasonic treatment

[0035] Step 2, the solid-liquid mixture after ultrasonication is filtered to obtain liquid A, and liquid A is centrifuged to obtain supernatant B;

[0036] Step 3, transfer the supernatant B to the reactor, and carry out the solvothermal reaction;

[0037] Step 4, purify the solution obtained in step 3, dry it after rotary evaporation, and complete;

specific Embodiment approach 2

[0038] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the organic solvent in step 1 can be acetone, ethanol, etc., the added reagent is p-phenylenediamine, etc., and the ultrasonic treatment water temperature is controlled at 20-30 ° C. The processing time is controlled at 5-15min, and other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0039] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the rotational speed of the centrifugal operation centrifuge described in step 2 is 4000-7000 rpm. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method of spinach-based multicolor luminescent carbon quantum dots. The steps of the preparation method are as follows: washing and chopping fresh spinach, dispersing the chopped spinach in an organic solvent, adding reagents for modification, and ultrasonically treating the mixture for a certain period of time; filtering the obtained solid-liquid mixture toobtain a liquid A, transferring a supernatant B obtained by centrifugation to a reactor for hydrothermal carbonization, and conducting natural cooling to room temperature; then taking out the solutionin the reactor to perform centrifugation and dialysis purification, so as to obtain a solution of multicolor fluorescent carbon quantum dots; and conducting rotary evaporation on the obtained solution, then and performing freeze-drying, so as to obtain the prepared carbon quantum dot powder. According to the present invention, the multicolor luminescent carbon quantum dots have the characteristics of wide source of raw materials, simple preparation method, low cost, easiness for realizing large-scale and industrial production, etc., and the carbon quantum dots prepared by the method have theadvantages of adjustable color, good optical stability, good biocompatibility, etc., so the carbon quantum dots have broad application prospects in LED lighting, biological imaging, ion detection, anti-counterfeiting, etc.

Description

technical field [0001] The invention belongs to the technical field of preparation of multicolor luminescent materials, and relates to a method for preparing multicolor luminescent carbon quantum dots by using spinach as a carbon source and regulating green color by different solvents. Background technique [0002] Carbon quantum dots were first reported in 2004. Due to the advantages of stable photochemical properties, low toxicity, good biocompatibility and water solubility, easy functionalization, and small particle size and simple preparation, carbon quantum dots have become a new emerging technology. emerging research topics. In recent years, carbon quantum dots prepared from biomass materials have attracted extensive attention from scholars because of their wide and renewable raw material sources, simple preparation methods, and environmental protection. Currently, research in this field mainly focuses on preparation methods and performance characterization. superior....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C09K11/65B82Y40/00
CPCC01B32/15C09K11/65B82Y40/00
Inventor 程倩何雨萱霍薪竹马诗琪郏莹莹
Owner NORTHEAST FORESTRY UNIVERSITY
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