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Composite silica antibacterial adsorption material, preparation method and application

A silica and compound antibacterial technology, applied in the field of materials, can solve the problems of low chemical decomposition efficiency, inability to guarantee the sterilization rate and particle adsorption rate, etc., to achieve the best air purification and antibacterial effect, and improve the effect of specific surface area.

Inactive Publication Date: 2020-04-14
山东百普瑞世环境科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, we found that after the combination of positive and negative ions and silica materials, the physical adsorption is greatly improved, but the chemical decomposition efficiency is low, which leads to the need to replace the silica materials after a certain period of time, otherwise it cannot be guaranteed. Effective sterilization rate and particle adsorption rate

Method used

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  • Composite silica antibacterial adsorption material, preparation method and application
  • Composite silica antibacterial adsorption material, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 2

[0031] The preparation of embodiment 1 silica base material

[0032] Get 10kg attapulgite (montmorillonite content 1.7%, quartz content 2.9%, feldspar content 2.1%, dolomite content 1.9%, surplus is attapulgite); It is joined in the acid solution of 50L (by weight Calculated, containing 3% hydrochloric acid and 10% phosphoric acid); Heating to reflux reaction time is 2h. Wash with water until the pH value of the supernatant is between 6-7, and bake at 400° C. for 8 hours to obtain silica nanoparticles (with a particle diameter of 90-200 nm).

[0033] Detected by ICP method, silica nanoparticles contain 5.3% MgO; 1.7% Fe 2 o 3 and 3.8% Al 2 o 3 ; and other metal oxides in amounts less than 0.1%.

Embodiment 2 2

[0034] The preparation of embodiment 2 silicon dioxide basic materials

[0035] Get 10kg attapulgite (montmorillonite content 1.7%, quartz content 2.9%, feldspar content 2.1%, dolomite content 1.9%, surplus is attapulgite); It is joined in the acid solution of 50L (by weight Calculated, containing 8% hydrochloric acid and 8% phosphoric acid); Heating to reflux reaction time is 2h. Wash with water until the pH value of the supernatant is between 6-7, and bake at 300° C. for 10 hours to obtain silica nanoparticles (with a particle size of 60-150 nm).

[0036] Detected by ICP method, silica nanoparticles contain 3.4% MgO; 0.6% Fe 2 o 3 and 2.2% Al 2 o 3 ; and other metal oxides in amounts less than 0.1%.

Embodiment 3 2

[0037] Embodiment 3 titanium dioxide / graphene / silicon dioxide composite antibacterial material

[0038] 1) Preparation of silica nanoparticles with surface-bonded graphene

[0039] a) 50mg of graphene is placed in 50ml of aqua regia for acid treatment for 5 minutes, the precipitate is collected and washed 3 times with deionized water, then the acidified graphene is dispersed in water, and ultrasonically dispersed to obtain a graphene dispersion;

[0040] b) Add 1 g of silica nanoparticles (prepared in Example 1) to 50 ml of deionized water, then add 50 mg of amino-containing silane coupling agent (KH550), stir and heat for 24 h under protective gas conditions;

[0041] c) adding the graphene dispersion to the reaction solution obtained in step b, adjusting the pH value to 3, stirring and reacting at room temperature for 3 hours; naturally settling and washing;

[0042] d) redispersing the material obtained in step c in water, adding 1.0 ml of hydrazine hydrate for reduction, ...

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Abstract

The invention relates to a composite silicon dioxide antibacterial adsorption material, and belongs to the field of materials. The composite antibacterial material has a particle size of 50-300 nm and includes silicon dioxide nanoparticles prepared from attapulgite and graphene bonded on the surfaces of the silicon dioxide nanoparticles. In the silicon dioxide nanoparticles, the content of MgO is 0.1-10 wt%, the content of Fe2O3 is 0.1-10 wt%, and the content of Al2O3 is 0.1-10 wt%, with the balance being silicon dioxide. A weight ratio of the graphene to the silicon dioxide nanoparticles is 0.01-0.1:1. The invention also provides a preparation method and applications of the material.

Description

technical field [0001] The invention relates to a composite silicon dioxide antibacterial adsorption material, which belongs to the field of materials. Background technique [0002] In recent years, my country's industrialization has developed rapidly, and the speed of urbanization has continued to accelerate. Various pollution problems have emerged one after another, among which air pollution has become a major problem of current environmental pollution. Factory exhaust, automobile exhaust, construction dust, and residents' lives emit a large number of soot particles, and these particles also provide a carrier for bacteria to grow and reproduce. These will not only seriously threaten people's health, but also have a negative impact on the natural climate, destroying the natural environment on which animals and plants live. [0003] Silica material has a large specific surface area, well-developed pores, highly ordered pores, good uniformity, stable skeleton structure, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01D53/02B01D2258/06B01J20/103B01J20/12B01J20/20
Inventor 侯文越侯晓民
Owner 山东百普瑞世环境科技有限公司