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Synthetic method of carbon quantum dot material

A technology of carbon quantum dots and solvents, applied in the field of synthetic carbon quantum dot materials, can solve the problems of high energy consumption, cumbersome experimental process, expensive precursors and passivators, etc., and achieve the effect of low cost

Active Publication Date: 2013-05-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In these steps, high-temperature carbonization, acid treatment, etc. are all necessary treatment conditions. Carbon precursors and passivators are expensive, the whole experimental process is cumbersome, and energy consumption is high, which is not conducive to the utilization and promotion of carbon quantum dots.

Method used

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  • Synthetic method of carbon quantum dot material
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  • Synthetic method of carbon quantum dot material

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Dissolve 146 mg (1 mmol) of lysine and 1 mmol of L-ascorbic acid in 2.9 g of ethanol at room temperature, transfer the solution to an autoclave, and treat at 100 °C for 2 hours. After centrifuging to remove large suspended matter, the solvent is evaporated to obtain the carbon quantum dot material. figure 1 The transmission electron micrographs of carbon quantum dot materials synthesized under this condition are given.

[0018] As an optional replacement, lysine can also be replaced by glutamic acid, which can also realize the reaction to obtain carbon quantum dot materials.

Embodiment 2

[0020] Dissolve 94 mg (1 mmol) of phenol and 10 mmol of L-ascorbic acid in 18.8 g of cyclohexane at room temperature, transfer the solution to an autoclave, and treat at 140°C for 10 hours. After centrifuging to remove large suspended matter, the solvent is evaporated to obtain the carbon quantum dot material. figure 2 The transmission electron micrographs of carbon quantum dot materials synthesized under this condition are given.

[0021] As an optional replacement, phenol can also be replaced by hydroquinone, catechol or p-cresol, and the reaction can also be realized to obtain carbon quantum dot materials.

Embodiment 3

[0023] Disperse the mesoporous silica material (MCM-41) containing cetyltrimethylammonium bromide (1 mmol, 365 mg) and 30 mmol isoascorbic acid in 200 g of water at room temperature , the mixture was transferred to an autoclave and treated at 160°C for 30 hours. The mesoporous silicon oxide material is washed and filtered to obtain carbon quantum dots dispersed in the pores of silicon oxide. image 3 The transmission electron micrographs of carbon quantum dot materials synthesized under this condition are given.

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Abstract

The invention relates to the technical field of inorganic synthesis, and aims to provide a synthetic method of a carbon quantum dot material. The method is characterized in that a reducing agent and a reaction substrate are put in a solvent and react at 100-200DEG C for 2-72h to synthesize the carbon quantum dot material; the molar ratio of the reducing agent to the reaction substrate is 1-100; and the mass ratio of the solvent to the reaction substrate is 20-1000. The method is simple and effective, adopts a solvothermal synthesis process to substitute traditional tedious synthetic processes, adopts an organic matter to substitute traditional expensive substances as a carbon precursor and adopts L-ascorbic acid and its analogues as the reducing agent. The whole process of the method has the advantages of high efficiency, environmental protection and low cost.

Description

technical field [0001] The invention relates to the technical field of inorganic synthesis, in particular to a new environmentally friendly and low-cost method for synthesizing carbon quantum dot materials. Background technique [0002] Due to its special properties, quantum dot materials have a wide range of applications in the fields of biology, electricity and optics. At present, most of the research on quantum dot materials revolves around metal compounds such as CdS, CdSe, ZnS and HgS. However, the high cost, high pollution and high toxicity of this kind of metal chemical quantum dots greatly limit their wide application. In recent years, carbon materials have attracted widespread attention due to their low cost and low pollution properties. Carbon quantum dot materials have also become a hot research topic. There are many methods for synthesizing carbon quantum dot materials, and these methods mainly revolve around the three steps of synthesizing carbon precursors, ...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B32/15
Inventor 肖丰收王亮孟祥举
Owner ZHEJIANG UNIV
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