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Integral nano material with high-efficiency removing formaldehyde at room temperature and broad-spectrum long-acting antibacterial property at same time

A nanomaterial, integrated technology, used in medical and health defense, air pollution control, integrated nanomaterials, and environmental protection fields, can solve the service life and economic problems of antibacterial agents, the failure of antibacterial performance, and can not adapt to the sustainable development of the economy. strategy and other issues, to achieve the effect of excellent removal ability, good stability and high stability

Inactive Publication Date: 2011-11-09
唐幸福 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This mechanism is due to the continuous consumption of Ag + , so the service life (durability) of the antibacterial agent depends on the silver content of the antibacterial material, and eventually the antibacterial performance will fail due to the depletion of silver.
So the exudation mechanism of Ag + Antimicrobial agents have problems in service life and economy, and cannot adapt to the economic strategy of sustainable development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Hollandite-type TiO with Ag-containing channels 2 Matrix (Ag x (A) y [M z Ti 8-z ]O 16 , A=K + , M=Zn 2+ or Mg 2+ ) preparation.

[0037] Powdered TiO 2 (P25), M salt (Zn(NO 3 ) 2 or Mg(NO 3 ) 2 ), template potassium nitrate (KNO 3 ) and organic matter P123 according to a certain amount, vigorously stirred and mixed evenly, dried at 100-150°C for 1-24h, then calcined at 900°C for 36h, washed after cooling, dried and calcined at 500°C for 24h to obtain skeleton-doped hollandite-type TiO 2 matrix.

[0038] The above hollandite-type TiO 2 The matrix is ​​added to a certain amount of aqueous solution to form a suspension. Add a certain concentration (≤25wt.%) of ammonia water to the silver nitrate solution (AgNO 3 ) to form silver ammonia (Ag(NH 3 ) 2 + ) solution. Under vigorous stirring, a certain concentration (≤30wt.%) of hydrogen peroxide (H 2 o 2 ) and silver ammonia (Ag(NH 3 ) 2 + ) solution was added dropwise to the above-mentioned hollandi...

Embodiment 2

[0043] Ag(K) 0.3 [Zn 2 Ti 6 ]O 16 Preparation of monolithic catalytic materials. Weigh a certain amount of Ag(K) 0.3 [Zn 2 Ti 6 ]O 16 , add a certain proportion of deionized water and 30% silica gel adhesive, stir at high speed for 10h, and obtain a certain concentration of doped Ag(K) 0.3 [Zn 2 Ti 6 ]O 16 slurry. The doped Ag(K) 0.3 [Zn 2 Ti 6 ]O 16 The slurry was coated on the pre-treated honeycomb ceramics, and fired at 500 °C for 12 hours to obtain doped Ag(K) 0.3 [Zn 2 Ti 6 ]O 16 monolithic catalytic material. Recorded as "integral Ag(K) 0.3 [Zn 2 Ti 6 ]O 16 ".

[0044] The formaldehyde performance test of monolithic catalytic materials was carried out on a fixed bed. The three-dimensional of monolithic catalyst is 150*150*40mm 3 , and then put it into a glass tube, at room temperature (20°C) and relative humidity of 50%, pass through a solution containing 5.0mg / m 3 For formaldehyde air, the wind speed is 1.5m / s. The air purifier uses FTIR infr...

Embodiment 4

[0050]Ag-Pt / Ag(K) 0.3 [Zn 2 Ti 6 ]O 16 The preparation of the catalytic material (Pt / Ag=3 / 7) is the same as the third embodiment.

[0051] The performance test of catalyst stability experiment is the same as embodiment two, continuous test time 120d, the formaldehyde of inlet is 50mg / m 3 , the outlet concentration of formaldehyde is 0.003mg / m 3 . The antimicrobial performance stability (life) test is carried out in accordance with the Japanese Industrial Standard JIS Z 2801:2000, Antimicrobial products-Test for antimicrobial activity and efficacy and the national standard GB / T 21510-2008 "Test method for antimicrobial performance of nano-inorganic materials". Antibacterial activity logarithmic values: 4.8 for Escherichia coli and 4.1 for Staphylococcus auresu.

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Abstract

The invention provides an integral nano material with high-efficiency completely removing formaldehyde in air at room temperature and broad-spectrum long-acting antibacterial property at same time, relating to the field of catalysis and environmental protection. The material is characterized in that: honeycomb ceramic is used as a carrier, first loaded channel silver-doped hollandite type crystalline TiO2 is used as a matrix, and a post loaded Ag-Pt alloy is used as an active component. The doped TiO2 matrix is characterized in that: the general formula can be expressed as Ag*(A)y[MzTi8-z]O16(M=Mg2+, Zn2+; A=K+, H+; x is less than or equal to 2; y is less than or equal to 2; z is less than or equal to 3), [MzTi8-z]O16 represents the composition of the TiO2 skeleton, and Ag*(A)y represents the composition of the TiO2 channel. The weight ratio of the Ag-Pt system to TiO2 is about 0-10%, wherein, the weight ratio of Ag to the Ag-Pt system is 0-100%. The integral nano material provided by the invention can completely remove formaldehyde air at room temperature and in ambient humidity, has long-acting, high efficiency and stable broad-spectrum antibacterial property, capable of being widely used for preparing various air purifiers and microbiological treatment devices.

Description

technical field [0001] The invention is an integral nano-material capable of simultaneously removing formaldehyde efficiently at room temperature and having broad-spectrum and long-acting antibacterial properties, and relates to the fields of environmental protection, air pollutant control, medical treatment, health defense and the like. It is characterized in that honeycomb ceramics are used as the carrier, and the channels are first loaded with silver titanium dioxide (TiO 2 ) as the matrix, and the silver-platinum system (Ag-Pt) as the active component in the future. The monolithic nanomaterial of the present invention can efficiently and stably remove formaldehyde in the air in a real environment of normal temperature and humidity, and has long-acting, high-efficiency and stable broad-spectrum antibacterial ability at the same time. [0002] The present invention also relates to the preparation method of the above-mentioned nanometer material. [0003] The present invent...

Claims

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Application Information

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IPC IPC(8): B01J23/66B01J23/50B01D53/86B01D53/72A01N59/16A01P1/00A61L9/00
Inventor 唐幸福蒋新姣
Owner 唐幸福
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