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Synthesis method for preparing water-soluble biomass-based fluorescent carbon dot and application

A synthesis method and biomass technology, which are applied in the field of nanomaterials science and application, can solve the problems of harsh preparation conditions and expensive raw materials of fluorescent carbon dots, and achieve the effect of solving the harsh preparation conditions.

Inactive Publication Date: 2016-02-10
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of harsh preparation conditions and expensive raw materials in the existing fluorescent carbon dots, the present invention provides a method for synthesizing water-soluble biomass-based fluorescent carbon dots and its application

Method used

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  • Synthesis method for preparing water-soluble biomass-based fluorescent carbon dot and application
  • Synthesis method for preparing water-soluble biomass-based fluorescent carbon dot and application
  • Synthesis method for preparing water-soluble biomass-based fluorescent carbon dot and application

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The preparation of embodiment 1 biomass-based fluorescent carbon dot material

[0025] Put 0.5g of cellulose powder and 0.35g of urea powder into a polytetrafluoroethylene reaction kettle, and simultaneously use 10ml of deionized water as a solvent. Put the reaction kettle in a constant temperature oven at 180°C, react for 72 hours, centrifuge to obtain a brown carbon dot reaction solution, dialyze the reaction solution with a 5-10kDa dialysis tube for 72 hours, and freeze-dry the dialyzed solution to finally obtain a biomass-based Fluorescent carbon dot material.

Embodiment 2

[0026] The preparation of embodiment 2 biomass-based fluorescent carbon dot materials

[0027] Put 0.5g of cellulose powder and 0.35g of urea powder into a polytetrafluoroethylene reaction kettle, and simultaneously use 10ml of deionized water as a solvent. Put the reaction kettle in a constant temperature oven at 200°C, react for 72 hours, centrifuge to obtain a brown carbon dot reaction solution, dialyze the reaction solution with a 5-10kDa dialysis tube for 72 hours, and freeze-dry the dialyzed solution to finally obtain biomass-based Fluorescent carbon dot material

Embodiment 3

[0028] The preparation of embodiment 3 biomass-based fluorescent carbon dot materials

[0029] Put 0.5g of cellulose powder and 0.35g of urea powder into a polytetrafluoroethylene reaction kettle, and simultaneously use 10ml of deionized water as a solvent. Put the reaction kettle in a constant temperature oven at 200°C, react for 72 hours, centrifuge to obtain a brown carbon dot reaction solution, dialyze the reaction solution with a 5-10kDa dialysis tube for 72 hours, and freeze-dry the dialyzed solution to finally obtain biomass-based Fluorescent carbon dot material.

[0030] The raw materials in this embodiment are commercially available analytically pure raw materials.

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Abstract

The invention discloses a synthesis method for preparing a water-soluble biomass-based fluorescent carbon dot and application, and belongs to the field of nanometer material science and application. The biomass-based fluorescent carbon dot is prepared with cellulose and urea as raw materials through a hydrothermal method in one step, brown reaction liquid is obtained, centrifugation is conducted on the reaction liquid, supernate is taken, and precipitate is removed. A dialysis tube with the molecular weight cutoff of 5-10 kDa is selected for conducting dialysis and extraction on the supernate, and carbon dot solid is obtained through freeze drying. The carbon dot is prepared from cellulose which is low in price and capable of being easily obtained, waste resources are effectively used, and the defects that the preparation condition is rigor and raw materials are expensive are well overcome. In addition, the water-soluble biomass-based fluorescent carbon dot is good in water solubility, little in toxin and good in biocompatibility and is successfully used for cell imaging.

Description

technical field [0001] The invention relates to the field of nanomaterial science and application, in particular to a preparation method and application of water-soluble biomass-based fluorescent carbon dots, and belongs to the field of nanomaterial science and application. Background technique [0002] Carbon quantum dots, referred to as carbon dots, are new fluorescent carbon nanomaterials with a particle size of less than 10nm. Since Xu et al. accidentally discovered carbon dots in 2004 when they used electrophoresis to separate single-armed carbon nanotubes, they have gradually become a new star in the family of carbon-based materials. Compared with traditional semiconductor quantum dots, it has the advantages of excellent water solubility, low toxicity, biosolubility, stable fluorescence and adjustable fluorescence. This makes carbon dots have potential applications in many aspects, such as bioimaging, biosensing, drug release, optoelectronic devices and fluorescent pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 姚菊明高俊阔沈培莲
Owner ZHEJIANG SCI-TECH UNIV
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