Method for preparing carbon quantum dots from milk

A technology of carbon quantum dots and milk, which is applied in the field of preparation of carbon quantum dots, can solve the problems of high energy consumption, long time consumption, and low efficiency, and achieve the effects of simple operation, high heat and mass transfer rate, and high production efficiency

Inactive Publication Date: 2020-12-01
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[LiWang, H.SusanZhou.GreenSynthesis of Luminescent Nitrogen-Doped Carbon Dots from Milk and Its Imaging Application[J].Analytical chemistry.2014,86(18):8902-8905] This method heat-treats milk at a high temperature of 180°C Two hours, long time-consuming, high energy consumption, especially intermittent operation, low efficiency

Method used

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  • Method for preparing carbon quantum dots from milk
  • Method for preparing carbon quantum dots from milk
  • Method for preparing carbon quantum dots from milk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Connect the reaction device as required, place the pipeline reactor in an oil bath and heat it to 120 degrees.

[0034] (2) A 1:19 mixture of fresh milk and deionized water was passed into the pipeline reactor by using a convection pump, stayed under heating conditions for 30 min, and the reaction product was collected by an Erlenmeyer flask.

[0035] (3) After filtering with a 0.22 μm nano filter head, the product was dialyzed in distilled water for 12 hours with a 1000 Da dialysis bag, and dried to obtain carbon quantum dot powder.

[0036] Take a small amount of product and measure the UV-Vis spectrum, the result is as follows figure 2 Shown in curve a. In addition, a small amount of the product was dispersed in ethanol for ultrasonic treatment to prepare a TEM sample, and the above solution was subjected to transmission electron microscope detection, and the results were as follows: image 3 Shown in a. It can be seen that carbon quantum dots with good unifo...

Embodiment 2

[0038] The treatment process and treatment time are the same as in Example 1, except that the reaction temperature is 140 degrees. Take a small amount of product and measure the UV-Vis spectrum, the result is as follows figure 2 As shown in the middle curve b, it can be seen that the absorption peak shifts slightly to the right and the absorption intensity increases.

Embodiment 3

[0040] The treatment process and treatment time are the same as in Example 1, except that the reaction temperature is 160 degrees. Take a small amount of product and measure the UV-Vis spectrum, the result is as follows figure 2 As shown in the middle curve c, it can be seen that the absorption peak continues to shift to the right and the absorption intensity continues to increase.

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Abstract

The invention belongs to the technical field of preparation of functional nano materials, and relates to a method for preparing carbon quantum dots from milk. According to the method, milk is used asa carbon source, and environment-friendly, continuous and controllable preparation of the carbon quantum dots is realized by combining a constant-flux pump with a pipeline reactor. Compared with the prior art, the method has the advantages that the raw materials are simple, the cost is low, the reaction temperature is low, the time is short, no toxic reagent is used, the obtained carbon quantum dots are regular in morphology, good in uniformity and adjustable in size and fluorescence property, and an important reference is provided for environment-friendly continuous preparation of nano materials.

Description

technical field [0001] The invention relates to a method for preparing carbon quantum dots from milk. Specifically, a pipeline reactor is used to continuously prepare carbon quantum dots with controllable fluorescence performance by using milk aqueous solution as a raw material, and belongs to the technical field of nanomaterial preparation. Background technique [0002] Carbon quantum dots are fluorescent nanomaterials composed of carbonaceous skeletons and surface groups with a particle size of less than 10 nm. As a zero-dimensional carbon-based material, carbon quantum dots are widely used in fluorescence detection, photovoltaic materials, sensors, photocatalysis and other fields due to their excellent optical properties, good water solubility, biocompatibility and low toxicity. In recent years, with the development of science and technology and the improvement of people's health awareness, carbon quantum dots have received more and more attention in the field of biomedic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C09K11/65B82Y40/00
CPCB82Y40/00C09K11/65C01B32/15
Inventor 林良良夏远路雯桐陈秀英高海燕沈洁许虎君
Owner JIANGNAN UNIV
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