Silver-carrying titanium dioxide anti-bacterial agent and preparation method thereof

A technology for carrying silver titanium dioxide and titanium dioxide, which is applied in the fields of botanical equipment and methods, fungicides, biocides, etc., can solve the problems of restricting the application of titanium dioxide, poor slow-release performance, affecting catalytic activity, etc., to enhance the photocatalytic antibacterial effect. , Enhance antibacterial effect, prevent discoloration effect
CN102205244AInactive Publication Date: 2011-10-05FUDAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FUDAN UNIV
Publication Date
2011-10-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of environmental catalytic materials and specifically relates to a preparation method of a silver-carrying titanium dioxide anti-bacterial agent. The anti-bacterial agent comprises titanium dioxide microspheres as carriers with a high length-diameter ratio and silver particles distributed on surfaces or interiors of the titanium dioxide microspheres. The preparation method comprises a titanium dioxide microsphere preparation method and a silver particle carrying method, wherein the silver particle carrying method adopts the following three methods of a complex reaction and photo-reduction combined method, a direct photo-reduction method and an excessive immersion method. The operation of the present preparation method is simple. Titanium dioxide carriers prepared by the present preparation method has a high length-diameter ratio, a high crystallinity and thus can reduce effectively recombination of electrons and holes and enhance titanium dioxide photocatalytical and anti-bacterial effects, and the silver particle carrying method can effectively control a dispersibility of silver and make silver be distributed on surfaces or interiors of titanium dioxide microspheres to realize a slow release of silver, avoid color change, and enhance anti-bacterial effects simultaneously.
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Description

technical field

[0001] The invention belongs to the technical field of environmental catalytic materials, and in particular relates to an antibacterial agent loaded with silver particles on titanium dioxide microspheres and a preparation method thereof. Background technique

[0002] Metal oxide titanium dioxide (TiO 2 ) has a special photocatalytic function, however, due to its forbidden band width of 3.2eV, only when the light with a wavelength of less than 387.5nm is irradiated, the electrons on the valence band will be excited into the conduction band, forming a negatively charged high active electron e - , and generate a corresponding hole h in the valence band + , are separated under the action of an electric field and migrate to the particle surface, react with water and oxygen to generate hydroxyl radicals (OH) and reactive oxygen species (O 2 - ), thereby performing a redox reaction with harmful substances adsorbed on the surface. However, electron-hole pairs ar...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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