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CuO base composite material and preparation method thereof

A composite material and aqueous solution technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve problems such as increased photocatalytic degradation efficiency, achieve reduced recombination rate, uniform particle size, avoid The effect of reunion

Inactive Publication Date: 2018-08-03
苏州宝澜环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the rapid recombination of photogenerated electrons and holes, the photocatalytic ability of cuprous oxide needs to be further improved, and the photocatalytic degradation efficiency needs to be further increased.
As far as we know, there is no report on the use of CQDs aqueous solution to participate in the reaction and post-treatment product design and synthesis of CuO-CQDs and its application in the catalytic degradation of organic pollutants under visible light.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of CuO-based composite material, the specific steps are as follows:

[0020] (1) Stir and mix copper chloride, CQDs aqueous solution, urea and water according to the solid-to-liquid mass ratio of 1g: 12ml: 0.3g: 25ml, and the content of the carbon quantum dot aqueous solution is 5mg / ml;

[0021] (2) Transfer the above solution to a reaction kettle lined with tetrafluoroethylene for hydrothermal reaction, react at 240°C for 2 hours, and finally cool to room temperature;

[0022] (3) The specific steps of using the CQDs aqueous solution to post-treat the product are to put the solid product after the hydrothermal reaction into the CQDs aqueous solution with a content of 7mg / ml according to the solid-to-liquid ratio of 1g: 10ml, and then vigorously stir at 85°C for 2h .

[0023] (4) The stirred product was washed and dried in vacuum at 50° C. for 12 h to obtain the CuO-CQDs composite material.

[0024] The preparation method of the carbon quantum dot...

Embodiment 2

[0030] A preparation method of CuO-based composite material, the specific steps are as follows:

[0031] (1) Stir and mix copper chloride, CQDs aqueous solution, urea and water according to the solid-to-liquid mass ratio of 1g: 10ml: 0.2g: 20ml, and the content of the carbon quantum dot aqueous solution is 1mg / ml;

[0032] (2) Transfer the above solution to a reaction kettle lined with tetrafluoroethylene for hydrothermal reaction, react at 220°C for 1 hour, and finally cool to room temperature;

[0033] (3) The specific steps of using the CQDs aqueous solution to post-treat the product are to put the solid product after the hydrothermal reaction into the CQDs aqueous solution with a content of 5mg / ml according to the solid-to-liquid ratio of 1g: 10ml, and then vigorously stir at 80°C for 1h .

[0034] (4) The stirred product was washed and dried in vacuum at 50° C. for 12 h to obtain the CuO-CQDs composite material.

[0035] The preparation method of the carbon quantum dots...

Embodiment 3

[0038] A preparation method of CuO-based composite material, the specific steps are as follows:

[0039] (1) Stir and mix copper chloride, CQDs aqueous solution, urea and water according to the solid-to-liquid mass ratio of 1g: 15ml: 0.5g: 30ml, and the content of the carbon quantum dot aqueous solution is 10mg / ml;

[0040] (2) Transfer the above solution to a reaction kettle lined with tetrafluoroethylene for hydrothermal reaction, react at 260°C for 3 hours, and finally cool to room temperature;

[0041] (3) The specific steps of using the CQDs aqueous solution to post-treat the product are to put the solid product after the hydrothermal reaction into the CQDs aqueous solution with a content of 10mg / ml according to the solid-to-liquid ratio of 1g: 10ml, and then vigorously stir at 90°C for 3h .

[0042] (4) The stirred product was washed and vacuum-dried at 50° C. for 12 hours to obtain CuO-CQDs visible photocatalytic composite material.

[0043] The preparation method of ...

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Abstract

The invention provides a CuO base composite material and a preparation method thereof. Since CQDs (Carbon Quantum Dots) have excellent electron storage ability and upconversion fluorescence property and can form water solubility protection on the surface of the material, a CuO nanometer structure can be prevented from conglobation in a preparation process; the CuO has an excellent electron transmission property and visible-light response, CQDs aqueous solution is used for carrying out product post-processing, and a stable CQDs protection and fluorescence conversion layer is formed on the surface of the CuO and is also favorable for improving the current carrier separation and transmission of the composite material in a light-catalyzed reaction process and reducing the recombination rate after the current carrier is separated; in addition, the pi-pi mutual action between the conjugated structure of the CQDs between benzene is favorable for enriching benzene on the surface of the composite material, two ingredients are cooperated to efficiently degrade organic gas pollutants (the degradation efficiency of benzene can be 93%) under visible light.

Description

technical field [0001] The invention relates to the technical field of carbon-based composite material preparation, in particular to a CuO-based composite material and a preparation method thereof. Background technique [0002] Due to its green sustainability, photocatalytic technology has attracted widespread attention of scientists in environmental pollution control and other aspects; however, the large band gap and ultraviolet response of many photocatalytic materials have greatly hindered its development, and it is impossible to achieve large-scale Therefore, it is of great practical significance to develop new photocatalysts with high-efficiency visible light response. [0003] Carbon quantum dots (CQDs) are a new member of the family of carbon nanomaterials, which are non-toxic, high fluorescence quantum yield, good biocompatibility, high light and chemical stability, etc., and can be used in biosensing, bioimaging, Environmental detection, photocatalysis and drug car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J37/10A62D3/17B01J37/02
CPCB01J23/72A62D3/17B01J37/0215B01J37/10
Inventor 于香斌
Owner 苏州宝澜环保科技有限公司
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