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Photocatalysis material having antibacterial effect, preparation method thereof and photocatalysis member

A technology of photocatalytic materials and photocatalytic particles, which is applied in the field of photocatalytic components, its preparation, and photocatalytic materials, can solve the problems of reducing antibacterial efficacy, application limitations, and poor antibacterial effect, and achieve good antibacterial effect and high catalytic activity. Effect

Pending Publication Date: 2018-07-20
MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some carriers, such as cloth, leather, etc., cannot withstand high temperature, and once the use environment cannot receive sufficient light, it will make it difficult for titanium dioxide itself to achieve good antibacterial and antiviral performance, so it is subject to certain restrictions in application.
In order to solve this problem, the more common method at present is to compound titanium dioxide with silver, but it can only improve a part of the antibacterial performance, although it has excellent antibacterial effect on common bacteria (such as Escherichia coli, Staphylococcus aureus, etc.) , but the growth of more tenacious bacteria (such as mycobacteria, etc.) cannot be effectively inhibited, resulting in poor antibacterial effect; and after a period of use, there will be biofilm adhesion on the surface of nano-silver materials, thus reducing the Antibacterial efficacy

Method used

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  • Photocatalysis material having antibacterial effect, preparation method thereof and photocatalysis member
  • Photocatalysis material having antibacterial effect, preparation method thereof and photocatalysis member
  • Photocatalysis material having antibacterial effect, preparation method thereof and photocatalysis member

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preparation example Construction

[0026] see figure 1 Shown is a flow chart of the steps of the preparation method of the photocatalytic material with antibacterial effect according to the first embodiment of the present invention. Such as figure 1 As shown, the preparation method S100 includes the following steps: step S102, preparing titanium hydroxide colloid, and then adding hydrogen peroxide to form a titanium dioxide colloid solution; Cerium and silver nitrate are then heated at a constant temperature until the colloidal hydrolysis disappears to form a photocatalytic material with antibacterial effect.

[0027] In step S102, titanium hydroxide colloid is prepared by mixing titanium tetrachloride and hydrochloric acid aqueous solution at a temperature of 0° C. to 15° C., and then adding ammonia water to the formed mixture. In actual implementation, first slowly add titanium tetrachloride as a titanium source into aqueous hydrochloric acid to form a titanium tetrachloride dispersion, and then add 30 wt% ...

experiment example 1

[0052] In an ice bath at 0°C, slowly drop titanium tetrachloride into a 5 molar (5M) hydrochloric acid aqueous solution, then slowly add 30% ammonia water into the titanium tetrachloride dispersion, and keep stirring until the pH of the dispersion 7, through several times of centrifugation and washing until the concentration of chlorine is lower than 5000ppm, then place the obtained colloid in distilled water and add hydrogen peroxide. The formed colloidal solution was placed in a three-necked conical flask, connected to a condenser, heated at 90°C for 1 hour, added cerium dioxide and silver nitrate solution, and adjusted to titanium dioxide, hydrogen peroxide, water, cerium dioxide solution and silver nitrate solution. The weight ratio is 0.02%: 0.0255%: 99.902%: 0.05%: 0.025%, and then heated for 2 hours to obtain a ceria-silver / titania composite sol solution. In the finally formed photocatalytic material, the weight ratio of titanium dioxide, cerium dioxide, silver and wate...

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Abstract

The invention discloses a photocatalysis material having an antibacterial effect. The photocatalysis material comprises a plurality of photocatalysis particles, and each of the photocatalysis particles comprises a core body and an outer coating layer formed on a surface of the core body, wherein the core body is formed by titanium dioxide, the outer coating layer is formed by cerium dioxide and silver, a weight ratio of the core body to the outer coating layer is between 1:1 and 1:2, and the weight proportion of the cerium dioxide in the outer coating layer is greater than that of the silver.The invention also discloses a preparation method of the photocatalysis material, and a photocatalysis member using the photocatalysis material.

Description

technical field [0001] The invention relates to a photocatalysis, its preparation method and application, in particular to a photocatalysis material with antibacterial effect, its preparation method and a photocatalysis component. Background technique [0002] Photocatalysis is a substance that can promote chemical reactions after being irradiated with light. Photocatalysis is good at photocatalytic treatment of low-concentration harmful chemical substances in the air, and it will not release harmful substances, so it is also an excellent catalyst for environmental purification. At present, metal oxides are commonly used as photocatalysts, among which titanium dioxide (TiO 2 ) are most commonly used because of their strong oxidizing power, high chemical stability, and non-toxicity. [0003] The photodecomposition mechanism of the so-called photocatalytic treatment procedure refers to the excitation of photocatalysis by ultraviolet light or sunlight, so that photocatalysis ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/66A01N59/16A01P1/00A01P3/00
CPCA01N59/16B01J23/66B01J35/396B01J35/393B01J35/39
Inventor 吕莉芳王子瑜
Owner MATERIAL TECH