Titanium dioxide nano antibacterial agent taking halloysite as carrier and preparation method thereof

A nano-antibacterial agent, titanium dioxide technology, applied in the field of titanium dioxide photocatalytic nano-antibacterial agent and its preparation, can solve the problems that photocatalytic antibacterial agents are difficult to apply on a large scale, affect the antibacterial effect of antibacterial agents, and the loading process is complicated. Killing inhibition, good product stability, good broad-spectrum effect

Inactive Publication Date: 2011-03-09
CHINA UNIV OF GEOSCIENCES (WUHAN) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But usually these carriers can only provide physical loads, and some carrier materials themselves are too expensive, some have complicated loading processes, and some also affect the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of preparation method taking halloysite as the titanium dioxide nano antibacterial agent of carrier, it comprises the following steps:

[0031] (1) Halloysite activation: Add halloysite with a purity of about 80wt% to dilute nitric acid solution, stir and activate at room temperature, and the solid-liquid ratio of the reaction system is 5% by mass (ie (mass of halloysite / The mass of dilute nitric acid solution) × 100% = 5%}, after the reaction, the product was centrifuged and dehydrated, washed and dried. The activation step is mainly to use acid solution to dissolve the residual impurities in the adsorption pores of halloysite and increase the surface reactivity of halloysite;

[0032] (2) Prepare titanium tetrachloride solution: first add hydrochloric acid solution prepared according to the volume ratio of concentrated hydrochloric acid (36-38wt%) and water at 1:1 to the beaker, place in an ice-water bath, and then add tetrachloride to it Titanium chloride, s...

Embodiment 2

[0038]A kind of preparation method taking halloysite as the titanium dioxide nano antibacterial agent of carrier, it comprises the following steps:

[0039] (1) Halloysite activation: Add halloysite with a purity of about 85wt% and a particle size of 200 mesh to a dilute nitric acid solution with a mass percentage of 5%, and stir and activate it at room temperature for 1 hour. The solid-to-liquid ratio of the reaction system is 8%, after the reaction is completed, the product is centrifuged and dehydrated, washed until neutral, and dried;

[0040] (2) Prepare titanium tetrachloride solution: first add hydrochloric acid solution prepared according to the volume ratio of concentrated hydrochloric acid (36-38wt%) and water at 1:1 to the beaker, place in an ice-water bath, and then add tetrachloride to it Titanium chloride, while constantly stirring, after the solution is stable, add water to dilute to obtain a 2% titanium tetrachloride solution by volume percentage;

[0041] (3)...

Embodiment 3

[0046] A kind of preparation method taking halloysite as the titanium dioxide nano antibacterial agent of carrier, it comprises the following steps:

[0047] (1) Halloysite activation: Add halloysite with a purity of about 95wt% and a particle size of 250 mesh to a nitric acid solution with a mass percentage of 6%, and stir and activate it at room temperature for 2 hours. The solid-to-liquid ratio of the reaction system is 10% by mass. %, after the reaction is completed, the product is centrifuged and dehydrated, washed to neutrality, and dried;

[0048] (2) Preparation of titanium tetrachloride solution: first add the hydrochloric acid solution prepared according to the volume ratio of concentrated hydrochloric acid (36-38wt%) and water at 2:1 to the beaker, place it in an ice-water bath, and then add tetrachloride to it Titanium chloride, while constantly stirring, after the solution is stable, add water to dilute to obtain a 5% titanium tetrachloride solution by volume perc...

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Abstract

The invention provides a titanium dioxide antibacterial agent taking hallyoysite as carrier and a preparation method thereof. The preparation method includes the following steps: halloysite is activated; titanium tetrachloride solution is prepared; the activated hylloysite is mixed with the titanium tetrachloride solution, thus obtaining suspension; ammonia solution is slowly dropwise added into the suspension until pH value of system is stabilized to be 6-7, and stirring is carried out for 30-60min; and reaction products are filtered, washed, dried and calcined, thus obtaining the titanium dioxide nano antibacterial agent taking halloysite as carrier. The preparation method is simple, and preparation cost is low, thus being applicable to mass production. The prepared product has good stability, firm antibacterial agent load, high photochemical catalysis efficiency, long service life, high antibacterial efficiency and broad spectrum, has good killing and inhibiting effects on various bacteria and moulds and produces no pollution to the environment.

Description

technical field [0001] The invention relates to an inorganic antibacterial material and a preparation method thereof, in particular to a titanium dioxide photocatalytic nano antibacterial agent and a preparation method thereof. Background technique [0002] Antibacterial materials refer to a new type of functional material that can inhibit or kill bacteria on its surface by adding certain antibacterial substances (antibacterial agents). The history of people's use of antibacterial materials began in ancient times, and has been widely used in building materials, plastics, metals, food, cosmetics, computers, household appliances, stationery, toys, medical care and other fields that people contact with daily. [0003] Inorganic antibacterial materials are a class of antibacterial materials developed in the mid-1980s. They have the advantages of broad-spectrum antibacterial, high safety, low toxicity, good heat resistance, long service life, and strong antibacterial effect. In r...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/08A01P1/00B01J21/16B01J21/06
Inventor 韩利雄严春杰
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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