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Photo-catalyst micro-particles and its preparing method, photocatalyst and preparing method and use

A technology of photocatalyst and particles, applied in the application of photocatalyst, photocatalyst particles coated with nano-titanium dioxide by metal materials, photocatalyst and its preparation, and the field of preparation of photocatalyst particles, which can solve the problems of losing superiority and affecting catalytic activity, etc.

Active Publication Date: 2007-08-29
GUANGZHOU MENTE NANOMETER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The antibacterial effect of titanium dioxide works immediately. It has advantages compared with consumable metal ion antibacterial agents such as aluminum and copper, but it loses its superiority in the absence of light.
However, the problem of the need for light in its catalytic process remains unresolved, and the problem that with TiO 2 The smaller the particle diameter, the easier it is to aggregate, which affects its catalytic activity

Method used

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  • Photo-catalyst micro-particles and its preparing method, photocatalyst and preparing method and use
  • Photo-catalyst micro-particles and its preparing method, photocatalyst and preparing method and use
  • Photo-catalyst micro-particles and its preparing method, photocatalyst and preparing method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Example 1: Take one liter of nano-titanium dioxide sol with a content of 5%, add 5g of copper chloride and 20ml of formaldehyde saturated solution to it, fully dissolve and mix it, place it under 100W ultraviolet light for 60 minutes, and carry out magnetic stirring at the same time, the obtained solution Use a centrifuge with a rotation speed of 4000 rpm to separate for 45 minutes, pour out the supernatant after centrifugation, add distilled water, and centrifuge for 45 minutes, repeat three times, wash out the cleaned sediment with ethanol, and put it in a dry place. The oven was dried to prepare a composite material of copper-wrapped nano-titanium dioxide. The composite material can be added to paints, plastics, etc., and has long-lasting antibacterial and antifungal functions.

Embodiment 2

[0104] Example 2: Take one liter of nano-titanium dioxide sol with a content of 1%, add 8g of copper chloride and 40ml of glucose, fully dissolve and mix, and then use 30W ultraviolet light for 300 minutes while stirring to prepare a solution containing copper-coated nano-titanium dioxide . Add 20 grams of ion exchange resin to the solution and stir for 10 minutes to obtain a stable photocatalyst colloid. The colloid can be directly sprayed on the surface of various objects to form a transparent film. The copper-wrapped nano-titanium dioxide in the film can control the release of copper ions for a long time to achieve the purpose of antibacterial and anti-mildew. The film also has photocatalytic properties. Utilizing these characteristics, it can be used to: spray on the inner surfaces of buildings such as traffic vehicles and facilities, to achieve the purpose of antibacterial, mildew and prevent the spread of diseases; apply to air conditioners, air purifiers and other house...

Embodiment 3

[0105] Embodiment 3: Take one liter of 10% nano-titanium dioxide sol, add 10 g of copper nitrate and 50 ml of formic acid, fully dissolve and mix, and adjust the pH value to 6 with ammonia water. 1000W ultraviolet light is used for 15 minutes, and the solution is circulated at the same time to prepare a photocatalyst solution containing copper-wrapped nano-titanium dioxide composite material.

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Abstract

This invention relates to a copper-coated nm titanium dioxide light accelerant particle and preparation method, while relates to a light accelerant and preparation method and its applications. This invention by adding TiO2 Solution metal copper, surfactant, reductant and under the UV irradiation, Use nm titanium dioxide as a photochemical reaction induced, copper metal particles were produced by light reduction reaction in the surface of nm titanium dioxide, and obtain copper nm TiO2 composite materials. This invention not only solves the TiO2 nm particles aggregation problem, and copper coated with TiO2 because of long-term metal ions release effects, in dark conditions with a good antibacterial antifungal function, it overcomes the shortcomings of traditional light accelerant must acting under the illumination conditions, has a broader application.

Description

technical field [0001] The invention relates to a photocatalyst particle, in particular to a photocatalyst particle coated with nanometer titanium dioxide. The invention also relates to a preparation method of photocatalyst particles. At the same time, the invention relates to a photocatalyst and a preparation method thereof. At the same time, the invention also relates to the application of the photocatalyst. Background technique [0002] Compared with organic antibacterial materials, inorganic antibacterial agents have the characteristics of broad spectrum, long-lasting, and safety. At present, there are two types of inorganic antibacterial materials, one is to rely on metal ions for sterilization, and the other is to rely on photocatalyst for sterilization: [0003] (1) Metal ions [0004] Most of the heavy metal ions in the metal ions have bactericidal ability. When bacteria and metal ions come into contact, the metal ions can destroy the main structure of the bacteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J21/06A61L2/14A61L9/22
Inventor 胡军辉刘宏芳刘少炎许贻晶
Owner GUANGZHOU MENTE NANOMETER SCI & TECH
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