Nano particle composite as well as synthesis method and application thereof

A synthesis method and technology of composite materials, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of complex preparation process and lack of catalytic performance, and achieve the effect of high degree of automation and continuous sterilization

Inactive Publication Date: 2018-06-22
NANJING MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of this technical solution is also slightly complicated, and the catalytic performance of the final product is determined by the type of catalyst in the catalyst particle layer, and there is no definite catalytic performance

Method used

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  • Nano particle composite as well as synthesis method and application thereof
  • Nano particle composite as well as synthesis method and application thereof
  • Nano particle composite as well as synthesis method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1, preparation of mesoporous silica SBA-15

[0028] The basic preparation process of this embodiment is as follows:

[0029] S1. Dissolve P123 in ultrapure water, stir and add hydrochloric acid solution and mix well, then add tetraethyl orthosilicate and stir; wherein, the mass volume ratio of P123 to ultrapure water is 0.05±0.03g / ml; add hydrochloric acid Stir the solution for at least 1 hour before, the concentration of hydrochloric acid solution is 3.4±0.5mol / L, the mass volume ratio of P123 to hydrochloric acid solution is 0.06±0.03g / ml; the mass volume ratio of P123 to ethyl orthosilicate is 0.44±0.25 g / ml, add tetraethyl orthosilicate and stir for at least 12 hours.

[0030] In addition, keep the temperature at 36°C±10°C during the whole process of step S1.

[0031] S2. Move the resulting mixture to a polytetrafluoroethylene autoclave for heating and stirring, then filter and dry the resulting solid;

[0032] Wherein, the heating and stirring tempera...

Embodiment 2

[0037] Example 2, Preparation of polydopamine-modified mesoporous silica

[0038] The mesoporous silica SBA-15 obtained in Example 1 and dopamine are ultrasonically mixed in a buffer solution. The mass ratio of mesoporous silica SBA-15 to dopamine is 1:0.2-1.2, and the buffer solution has a pH of 7.0-12.0 and a concentration of 1-100mmol / L Tris-HCl buffer, the mass volume ratio of mesoporous silica SBA-15 to Tris-HCl buffer is 1.6±1mg / ml, and the ultrasonic mixing time is at least 6 hours; then centrifuge and collect the precipitate , the centrifugation rate is 8000±4000rpm, and the centrifugation time is at least 3 minutes; the precipitate is washed and dried, and the precipitate is washed with ultrapure water at least 3 times; the polydopamine-modified mesoporous silica is obtained.

[0039]Specifically, the mass of mesoporous silica SBA-15 is 50 mg, the mass of dopamine is 10-60 mg, the buffer is 30 ml of Tris-HCl buffer with pH 8.5 and 10 mmol / L, and the ultrasonic mixing ...

Embodiment 3

[0041] Embodiment 3, the preparation of nanoparticle composite material

[0042] Stir and mix the polydopamine-modified mesoporous silica obtained in Example 2 with the soluble silver salt solution, then centrifuge and collect the precipitate; after washing and drying the precipitate, the polydopamine-modified mesoporous silica immobilized with silver nanoparticles, namely nano Particle composite finished product.

[0043] When stirring and mixing, the temperature of the solution is 60°C-100°C, the pH of the solution is 7.0-12.0, and the stirring and mixing time is at least 6 hours. The mass volume ratio of the polydopamine-modified mesoporous silicon oxide to the soluble silver salt solution is 6.6±5mg / ml, and the silver ion concentration in the soluble silver salt solution is 32±20mmol / L. The centrifugation rate is 8000±4000rpm, and the centrifugation time is at least 3 minutes; the precipitate is washed at least 3 times with ultrapure water.

[0044] Specifically, the pol...

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Abstract

The invention relates to a nano particle composite as well as a synthesis method and application thereof. The synthesis method of the nano particle composite comprises the following steps: performingultrasonic mixing of mesoporous silica and dopamine; stirring and mixing the product with a soluble silver salt solution, to finally obtain a finished product of nano particle composite. The nano particle composite can be applied to organic dye catalytic degradation or bacteria resistance. The synthesis method provided by the invention is green, simple and quick; the obtained nano particle composite realize efficient catalytic degradation of various organic dyes, realizes online catalysis and has a high degree of automation; meanwhile, the nano particle composite has an effect of killing various bacteria and fungi, and realizes broad-spectrum, efficient and continuous sterilization.

Description

technical field [0001] The invention relates to a nanoparticle composite material, its synthesis method and application. The material can catalyze and degrade organic dyes and has broad-spectrum antibacterial properties, and belongs to the technical field of green catalysis and antibacterial material synthesis. Background technique [0002] As far as the inventor knows, among the existing composite materials, there are very few materials that can both catalytically degrade organic dyes and broad-spectrum antibacterial properties, and materials that have one of them alone have some defects. Specifically, the synthesis process of materials that can catalyze the degradation of organic dyes is relatively complicated, which requires a lot of manpower, material and financial resources; toxic chemical reagents are used in the synthesis process, which has poor biocompatibility and pollutes the environment; Catalytic degradation of a variety of dyes, catalytic degradation takes a lon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J29/03B01J37/34B01J37/03B01J37/08A01N59/16A01N25/10A01P1/00A01P3/00B82Y30/00B82Y40/00A62D3/30A62D101/26A62D101/28
CPCB01J31/069A01N25/10A01N59/16A62D3/30A62D2101/26A62D2101/28B01J29/0325B01J37/035B01J37/08B01J37/343B01J2229/18B82Y30/00B82Y40/00
Inventor 陈进宋翌琰
Owner NANJING MEDICAL UNIV
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