Carbon quantum dot doped carbon nitride composite nano material with photocatalytic antibacterial performance as well as preparation method and application thereof

A technology of composite nanomaterials and carbon quantum dots, which is applied in the field of carbon quantum dot-doped carbon nitride composite nanomaterials and its preparation, can solve the problems of cumbersome and complicated preparation methods, small specific surface area of ​​composite materials, and high production costs, and achieve raw material Inexpensive, increased specific surface area, low cost effect

Inactive Publication Date: 2020-10-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of the traditional composite photocatalytic antibacterial material CQDs\CN preparation method is cumbersome and complicated, the production cost is high, and the specific surface area of ​​the composite material is small, the purpose of the present invention is to provide a simple and efficient, low production cost, only one step to complete the preparation , the prepared material has a large specific surface area and has very efficient photocatalytic antibacterial activity against both Gram-negative bacteria (Escherichia coli) and Gram-positive bacteria (Staphylococcus aureus).

Method used

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  • Carbon quantum dot doped carbon nitride composite nano material with photocatalytic antibacterial performance as well as preparation method and application thereof
  • Carbon quantum dot doped carbon nitride composite nano material with photocatalytic antibacterial performance as well as preparation method and application thereof
  • Carbon quantum dot doped carbon nitride composite nano material with photocatalytic antibacterial performance as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0054] Preparation of carbon quantum dot-doped carbon nitride composite nanomaterials CQDs\CN with photocatalytic antibacterial properties, including:

[0055] Prepare two crucibles of different sizes and specifications, add 1 g of ammonium citrate into the large crucible, and add 10 g of urea into the small crucible. Put the small crucible into the large crucible, cover it and place it in the muffle furnace, and heat it at 10°C min -1 The heating rate was heated to 600 °C and kept for 3 h, and finally the carbon quantum dot-doped carbon nitride composite nanomaterial CQDs\CN with photocatalytic antibacterial properties was obtained. Specific antibacterial effects such as figure 1 and figure 2 As shown, after 90 minutes of light irradiation, the inactivation rate of Escherichia coli reached 100%, and the inactivation rate of Staphylococcus aureus reached 97%.

Embodiment 2

[0057] Preparation of carbon quantum dot-doped carbon nitride composite nanomaterials CQDs\CN with photocatalytic antibacterial properties, including:

[0058] Prepare two crucibles of different sizes and specifications, add 1 g of ammonium citrate into the large crucible, and add 3 g of melamine into the small crucible. Put the small crucible into the large crucible, cover it and put it into the muffle furnace, and heat it at 6°C min -1 The heating rate was heated to 570 °C and kept for 3 h, and finally the carbon quantum dot-doped carbon nitride composite nanomaterial CQDs\CN with photocatalytic antibacterial properties was obtained. Specific antibacterial effects such as image 3 and Figure 4 As shown, after 90 minutes of light irradiation, the inactivation rate of Escherichia coli reached 99%, and the inactivation rate of Staphylococcus aureus reached 99%.

Embodiment 3

[0060] Preparation of carbon quantum dot-doped carbon nitride composite nanomaterials CQDs\CN with photocatalytic antibacterial properties, including:

[0061] Prepare two crucibles with different sizes and specifications, add 1 g of EDTA into the large crucible, and add 3 g of melamine into the small crucible. Put the small crucible into the large crucible, cover it and put it into the muffle furnace, and heat it at 6°C min -1 The heating rate was heated to 570 °C and kept for 3 h, and finally the carbon quantum dot-doped carbon nitride composite nanomaterial CQDs\CN with photocatalytic antibacterial properties was obtained. Specific antibacterial effects such as Figure 5 and Figure 6 As shown, after 90 minutes of light irradiation, the inactivation rate of Escherichia coli reached 98%, and the inactivation rate of Staphylococcus aureus reached 100%.

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Abstract

The invention discloses a carbon quantum dot doped carbon nitride composite nano material with photocatalytic antibacterial performance as well as a preparation method and application thereof. The method comprises the following steps of: preparing two crucibles with different sizes and specifications, putting a precursor for preparing carbon quantum dots (CQDs) into a large crucible, and putting aprecursor for preparing carbon nitride (CN) into a small crucible; and putting the small crucible into the large crucible, capping the large crucible, putting the large crucible in a muffle furnace,and carrying out calcining to finally obtain the CQDs/CN composite photocatalytic antibacterial material. The method can be completed only in one step, the operation is simple and convenient, the control is easy, the preparation cost is low, and the prepared carbon quantum dot doped carbon nitride composite nano material has very high photocatalytic antibacterial activity on escherichia coli and staphylococcus aureus.

Description

technical field [0001] The invention relates to the field of antibacterial materials, in particular to a carbon quantum dot-doped carbon nitride composite nanomaterial with photocatalytic antibacterial performance, a preparation method and application thereof. Background technique [0002] With the continuous improvement of urbanization and residents' living standards, environmental pollution and public health problems are becoming more and more serious. Microbial bacteria exist in every aspect of human life, and the pollution of pathogenic bacteria seriously threatens people's health. Existing drinking water pretreatment processes (such as coagulation, sedimentation) can remove up to 90% of bacteria, 70% of viruses and 90% of protozoa (CAMEL V, BERMOND A 1998. The use of ozone and associated oxidation processes in drinking water treatment. Water Research [J], 32: 3208-3222.). Using activated carbon adsorption, membrane filtration can remove about 90% of bacteria, but the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10B01J37/08A01N59/00A01P1/00C09K11/65B82Y30/00B82Y40/00C02F1/30
CPCA01N59/00B01J27/24B01J35/004B01J35/1004B01J37/082B82Y30/00B82Y40/00C02F1/30C02F2303/04C02F2305/10C09K11/0883C09K11/65
Inventor 张伟德吴昊诸葛桂英钟庆
Owner SOUTH CHINA UNIV OF TECH
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