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Porous graphene bacteriostatic material and preparation method thereof

A technology of porous graphene and antibacterial materials, applied in botany equipment and methods, chemicals for biological control, animal repellents, etc., can solve the problems of reduced antibacterial effect, reduce agglomeration, increase light The effect of improving the absorption range and photocatalytic antibacterial performance

Inactive Publication Date: 2018-10-16
GUANGXI UNIV OF CHINESE MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also provided is the porous graphene loaded mixed crystal type mesoporous Ag-TiO prepared by the method of the present invention 2 Antibacterial material, which makes full use of graphene and mixed crystal mesoporous Ag-TiO 2 The antibacterial properties of antibacterial materials have excellent synergistic antibacterial effects, and because the Ag nanoparticles are first loaded with TiO 2 In mesoporous spheres, it is not easy to reunite on the three-dimensional structure of graphene, which solves the problem of reduced antibacterial effect

Method used

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  • Porous graphene bacteriostatic material and preparation method thereof
  • Porous graphene bacteriostatic material and preparation method thereof
  • Porous graphene bacteriostatic material and preparation method thereof

Examples

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Embodiment 1

[0026] (1) Mesoporous TiO with a diameter of 10 nm and two crystal forms of anatase and rutile 2 Mixed crystal TiO with a mass ratio of 80:10 2 Mesoporous spheres and silver nitrate were dispersed and dissolved in deionized water, stirred evenly, added, stirred until completely dissolved, heated in a water bath at 90°C for 5 minutes under ultrasonic, filtered out the precipitate and dried in vacuum to obtain mixed crystal mesoporous Ag-TiO 2 Antibacterial agent, wherein the mixed crystal TiO 2 The mass ratio of mesoporous spheres, silver nitrate and urea is 1:0.5:20;

[0027] (2) Graphene oxide is ultrasonically dispersed in deionized water to form a uniform graphene oxide aqueous solution, then add citric acid and stir to dissolve to form a mixed solution, the concentration of graphene oxide in the mixed solution is 3mg / mL, the concentration of citric acid to 20 mg / mL, transfer the mixed solution into an autoclave and conduct a hydrothermal reaction at 150°C for 10 hours, t...

Embodiment 2

[0032] (1) Mesoporous TiO with a diameter of 20 nm and two crystal forms of anatase and rutile 2 Mixed crystal TiO composed of 70:30 mass ratio 2 Mesoporous spheres and silver nitrate were dispersed and dissolved in deionized water, stirred evenly, added, stirred until completely dissolved, heated in a water bath at 60°C for 20 minutes under ultrasonic, filtered out the precipitate and dried in vacuum to obtain mixed crystal mesoporous Ag-TiO 2 Antibacterial agent, wherein the mixed crystal TiO 2 The mass ratio of mesoporous spheres, silver nitrate and urea is 1:0.3:10;

[0033] (2) Graphene oxide is ultrasonically dispersed in deionized water to form a uniform aqueous solution of graphene oxide, then add thiourea and stir to dissolve to form a mixed solution, the concentration of graphene oxide in the mixed solution is 1mg / mL, the concentration of thiourea 10mg / mL, transfer the mixed solution into an autoclave, hydrothermally react at 120°C for 8h, and cool down to room tem...

Embodiment 3

[0037] (1) Mesoporous TiO with a diameter of 30 nm and two crystal forms of anatase and rutile 2 Mixed crystal TiO with a mass ratio of 90:20 2 Mesoporous balls and silver nitrate were dispersed and dissolved in deionized water, stirred evenly, added, stirred until completely dissolved, heated in a water bath at 80°C for 15 minutes under ultrasonic, filtered out the precipitate and dried in vacuum to obtain mixed crystal mesoporous Ag-TiO 2 Antibacterial agent, wherein the mixed crystal TiO 2 The mass ratio of mesoporous spheres, silver nitrate and urea is 1:0.2:15;

[0038] (2) Ultrasonic dispersion of graphene oxide in deionized water to form a uniform graphene oxide aqueous solution, then add oxalic acid and stir to dissolve to form a mixed solution, the concentration of graphene oxide in the mixed solution is 5mg / mL, and the concentration of oxalic acid is 1mg / mL, the mixed solution was transferred into an autoclave, hydrothermally reacted at 200°C for 12h, and cooled t...

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Abstract

The invention provides a porous graphene bacteriostatic material and a preparation method thereof. According to the preparation method, three-dimensional porous graphene is taken as a substrate, and nano silver and mixed crystal type mesoporous TiO2 are loaded to prepare an Ag-TiO2 bacteriostatic agent. Ag nanoparticles are loaded in TiO2 mesoporous spheres firstly, and are not easy to agglomerateon the three-dimensional structure of graphene, thus solving the problem of lower bacteriostatic effect caused by agglomeration. At the same time, the invention further provides a porous graphene loaded mixed crystal type mesoporous Ag-TiO2 bacteriostatic material prepared by the method. The material fully uses the antimicrobial properties of the graphene and the mixed crystal type mesoporous Ag-TiO2 bacteriostatic material, and has an excellent synergistic antimicrobial effect.

Description

technical field [0001] The invention relates to the field of nano antibacterial composite materials, in particular to a porous graphene loaded mixed crystal mesoporous Ag-TiO 2 Bacteriostatic material and preparation method thereof. Background technique [0002] Graphene is a planar film composed of carbon atoms in a hexagonal honeycomb lattice with sp2 hybrid orbitals. It is a two-dimensional material with a thickness of only one carbon atom. Due to its excellent optical and electrical properties, it is widely used in many fields. It has a good application prospect and has attracted much attention in recent years. At the same time, studies have found that nanoscale graphene can effectively kill bacteria. Therefore, in recent years, there have been various studies on the use of graphene in the field of antibacterial materials, especially the preparation of antibacterial composites using two-dimensional graphene oxide as a matrix to load silver nanoparticles. Materials have...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N59/00A01P1/00
CPCA01N59/16A01N59/00
Inventor 赵立春唐农冷静宋策钟余特于培良王雪
Owner GUANGXI UNIV OF CHINESE MEDICINE
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