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Process for preparing compound inorganic germicide

An inorganic antibacterial agent and composite technology, which is applied in the field of preparation of composite inorganic antibacterial agents, can solve the problems of low removal rate, low photocatalyst activity, secondary pollution, etc., and achieve the effect of broad application prospects

Active Publication Date: 2005-03-02
SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional indoor air purification methods include activated carbon adsorption (main disadvantages: easy saturation, odorous bacteria, low removal rate), ozone oxidation (main disadvantages: low removal rate, secondary pollution), filter membrane, electric dust collection (main disadvantages : invalid for toxic inorganic substances, etc.), it is urgent to use high-tech and new purification materials to control the increasingly serious indoor air pollution problem
Japanese patent JP53095893 discloses a photocatalyst prepared by hydrolyzing titanium chloride such as titanium chloride, the photocatalyst has low activity

Method used

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  • Process for preparing compound inorganic germicide

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Effect test

Embodiment 1

[0018] Embodiment 1: Get 33.4g of anatase type titanium dioxide with an average particle diameter of about 20nm and make it into 200ml deionized aqueous solution, disperse it in the microreactor for about 20min, control the rotating speed to be 3000rpm, and be 10% of titanium dioxide according to the amount of hydroxyapatite, Add the ammonium dihydrogen phosphate deionized aqueous solution dropwise into the mixed slurry of titanium dioxide and calcium nitrate, then stir and react for 3 hours to obtain a composite powder suspension; 3 Make a 1.5g / l solution with deionized water and add it dropwise to the composite powder suspension, the theoretical silver loading is 2% (wt), stir for 2 hours, control the pH to 6-7, then suction filter, wash, and finally Dry the composite antibacterial agent at 80-100°C, and then heat-treat at 400°C for 1 hour to obtain sample 1

Embodiment 2

[0019] Embodiment two: get the anatase type titanium dioxide 33.4g that average particle size is about 20nm and be made into 200ml deionized aqueous solution, disperse about 20min in the microscopic reactor, control rotating speed is 4000rpm, according to the hydroxyapatite amount is 20% of titanium dioxide, Add the ammonium dihydrogen phosphate deionized aqueous solution dropwise into the mixed slurry of titanium dioxide and calcium nitrate, then stir and react for 3 hours to obtain a composite powder suspension; 3 Make a 1.5g / l solution with deionized water and add it dropwise to the composite powder suspension, the theoretical silver loading is 2% (wt), stir for 2 hours, control the pH to 6-7, then suction filter, wash, and finally The composite antibacterial agent was dried at 80-100°C, and then heat-treated at 400°C for 1 hour to obtain sample 2.

Embodiment 3

[0020] Embodiment three: get the anatase type titanium dioxide 33.4g that average particle size is about 20nm and be made into 200ml deionized aqueous solution, disperse about 20min in the microscopic reactor, control rotating speed is 4000rpm, according to the amount of hydroxyapatite is 40% of titanium dioxide, Add the ammonium dihydrogen phosphate deionized aqueous solution dropwise into the mixed slurry of titanium dioxide and calcium nitrate, then stir and react for 3 hours to obtain a composite powder suspension; 3 Make a 1.5g / l solution with deionized water and add it dropwise to the composite powder suspension, the theoretical silver loading is 2% (wt), stir for 2 hours, control the pH to 6-7, then suction filter, wash, and finally The composite antibacterial agent was dried at 80-100°C, and then heat-treated at 400°C for 1 hour to obtain sample 3.

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Abstract

The present invention relates to the preparation process of compound inorganic germicide, and belongs to the field of purifier material preparing technology. The present invention features that the surface of titania grain with photocatalytic activity has loaded porous structure coating layer of calcium hydroxy phosphate and to load germicidal silver ion in the porous structure. The preparation process includes mixing nano titania, ammonium dihydrogen phosphate and calcium nitrate to react inside a micro mixing reactor to obtain compound powder suspension; dropping the water solution of silver nitrate into the suspension for ion exchange to deposit silver ion on the surface of the compound grain; and heat treatment at 400-500 deg.c for 1 hr to obtain the compound inorganic germicide. The compound inorganic germicide has the synergistic effect of photocatalysis and metal ion germicide.

Description

technical field [0001] The invention relates to a method for preparing a composite inorganic antibacterial agent, which belongs to the preparation of chemical inorganic antibacterial agent purification materials [0002] technology field. Background technique [0003] In the field of new materials, the sudden emergence of antibacterial materials and purification materials has attracted more and more attention. From the perspective of the application of purification materials, in addition to the traditional waste water and waste gas purification, indoor air purification has attracted widespread attention. With the rapid development of the economy and the continuous improvement of industrialization and urbanization, people's lifestyles are undergoing drastic changes, and the time of living and working indoors is getting longer and longer. Indoor air quality has become an important part of the working and living environment. . At present, the problem of indoor environmental ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/00
Inventor 张剑平马寒冰杨凤谢晓峰
Owner SHANGHAI UNIV
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