Preparation method of carbon quantum dots

A technology of carbon quantum dots and mass ratio, applied in the field of nano-luminescent material preparation, can solve the problems of toxic materials and environmental hazards, and achieve the effect of easy raw materials and simple preparation process

Inactive Publication Date: 2018-05-29
史书亭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Quantum dots are generally derived from a mixture of lead, cadmium and silicon, but these materials are generally toxic and hazardous to the environment

Method used

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  • Preparation method of carbon quantum dots
  • Preparation method of carbon quantum dots

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specific Embodiment approach 1

[0029] A method for preparing carbon quantum dots, comprising the steps of:

[0030] Step 1. Raw material preparation: Weigh raw material A, raw material B, and raw material C. The raw material A is agricultural and forestry waste, the raw material B is kitchen waste, and the raw material C is vegetables, fruits, grains, and flowers. , one or more mixtures of Chinese herbal medicines, for use;

[0031] Step 2. Raw material pretreatment: After crushing and sieving the raw material weighed in step 1, add the processed raw material to tap water of a certain quality, mix well and set aside;

[0032] Step 3, pH adjustment: add organic acid or strong base or weak base to the mixed solution treated in step 2, adjust the pH of the mixed solution, and set aside;

[0033] Step 4, ultrasonic treatment: Add graphite to the mixed solution treated in step 3, the mass ratio of the mixed solution to the graphite is 30:1, and then perform ultrasonic treatment, the ultrasonic treatment power i...

specific Embodiment approach 2

[0046] A method for preparing carbon quantum dots, comprising the steps of:

[0047] Step 1. Raw material preparation: Weigh raw material A, raw material B, and raw material C. The raw material A is agricultural and forestry waste, the raw material B is kitchen waste, and the raw material C is vegetables, fruits, grains, and flowers. , one or more mixtures of Chinese herbal medicines, for use;

[0048] Step 2. Raw material pretreatment: After crushing and sieving the raw material weighed in step 1, add the processed raw material to tap water of a certain quality, mix well and set aside;

[0049] Step 3, pH adjustment: add organic acid or strong base or weak base to the mixed solution treated in step 2, adjust the pH of the mixed solution, and set aside;

[0050] Step 4, ultrasonic treatment: Add graphite to the mixed solution treated in step 3, the mass ratio of the mixed solution to the graphite is 30:2, and then perform ultrasonic treatment, the ultrasonic treatment power i...

specific Embodiment approach 3

[0063] A method for preparing carbon quantum dots, comprising the steps of:

[0064] Step 1. Raw material preparation: Weigh raw material A, raw material B, and raw material C. The raw material A is agricultural and forestry waste, the raw material B is kitchen waste, and the raw material C is vegetables, fruits, grains, and flowers. , one or more mixtures of Chinese herbal medicines, for use;

[0065] Step 2. Raw material pretreatment: After crushing and sieving the raw material weighed in step 1, add the processed raw material to tap water of a certain quality, mix well and set aside;

[0066] Step 3, pH adjustment: add organic acid or strong base or weak base to the mixed solution treated in step 2, adjust the pH of the mixed solution, and set aside;

[0067] Step 4, ultrasonic treatment: Add graphite to the mixed solution treated in step 3, the mass ratio of the mixed solution to the graphite is 30:0.1, and then perform ultrasonic treatment, the ultrasonic treatment power...

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Abstract

The invention provides a preparation method of carbon quantum dots and belongs to the technical field of preparation of nano luminescent materials. The preparation method comprises the following steps: weighing forestry and agricultural residues, kitchen garbage and mixture of one or more of vegetables, fruits, grains, flowers and Chinese herbal medicines in a ratio of parts by weight of 1:(1-100):(0.5-100) as raw materials; pulverizing the weighed raw materials, sieving the pulverized raw materials, performing uniform mixing, and adding organic acid or strong base or weak base to the treatedmixed liquid; and performing ultrasonic treatment, hydrothermal treatment and centrifugal treatment to obtain a solution, putting the obtained solution after centrifugal treatment into a dialysis bag,and putting the dialysis bag in a beaker filled with distilled water to be subjected to dialysis treatment so as to obtain the carbon quantum dots. The yield of the carbon quantum dots provided by the invention is 50-90%, and the sizes of the prepared carbon quantum dots are 1-2nm; and compared with the existing preparation method of the carbon quantum dots, the preparation method provided by theinvention has the advantages that the preparation process is simple, the raw materials are easy to obtain, and the preparation method is environmentally friendly and harmless.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano-luminescent materials, and in particular relates to a preparation method of carbon quantum dots. Background technique [0002] Carbon nanoparticles have a large surface area, so scientists have long believed that such nanoparticles have very strange chemical and physical properties compared to macroscopic carbon. Scientists extracted carbon nanoparticles and proved that the surface of these particles covered with a special polymer can emit very bright light under light, just like tiny photospheres. The scientists believe this photoluminescence may be due to the fact that the cavities on the surface of the carbon quantum dots can store energy. The light-emitting mechanism of metal quantum dots is slightly different. [0003] Compared with metal quantum dots, carbon quantum dots are non-toxic, less harmful to the environment, and cheaper to manufacture. Sensors made from it can be use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C09K11/65B82Y40/00
CPCB82Y40/00C09K11/65
Inventor 史书亭史书杰
Owner 史书亭
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