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Photocatalysis antibacterial material excited by visible light and application thereof

A photocatalytic material and visible light technology, applied in the direction of application, catalyst activation/preparation, physical/chemical process catalyst, etc., to achieve the effect of overcoming limitations, good photocatalytic antibacterial activity, and improving utilization rate

Inactive Publication Date: 2010-01-06
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to some shortcomings of traditional water disinfection technology, such as chlorination disinfection, research shows that it will produce toxic by-products that are harmful to human health, so traditional water disinfection technology cannot be well promoted

Method used

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  • Photocatalysis antibacterial material excited by visible light and application thereof
  • Photocatalysis antibacterial material excited by visible light and application thereof
  • Photocatalysis antibacterial material excited by visible light and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1 Pure Bi 2 WO 6 Preparation of and its application in the detection of photocatalytic antibacterial activity

[0024] Bi 2 WO 6 Using Bi(NO 3 ) 2 ·5H 2 O and Na 2 WO 4 2H 2 O is synthesized as a raw material, and according to the stoichiometric ratio, weigh 0.97g Bi(NO 3 ) 2 ·5H 2 O (analytically pure) was dissolved in 20mL of water, then 0.210g of citric acid was added, stirred for 30 minutes, and 0.329g of Na 2 WO 4 2H 2 O (analytical grade) was dissolved in 20 mL of water, and the two were mixed and stirred to form a white suspension precursor. Then take a certain volume and put it into a hydrothermal kettle, and treat it at a temperature of 180° C. for 24 hours. After the reaction, the obtained pale yellow precipitate was filtered, washed with deionized water and absolute ethanol five times each, and then dried at 80°C. Such as figure 1 , determined to be Bi by XRD phase analysis 2 WO 6 , through the determination of the UV / Vis diffuse...

Embodiment 2

[0026] Example 2 Different amounts of Ag ion-supported Bi 2 WO 6 Preparation of materials and their application in photocatalytic antibacterial detection

[0027] a) The whole system is an ethanol system, and 0.01M Bi(NO 3 ) 2 ·5H 2 O (analytical grade) and 0.01M Na 2 WO 4 2H 2 O (analytical pure) was stirred evenly, and 0.0025M AgNO was added3 , and stir for 10 minutes to mix well. Then take a certain volume of the precursor and put it into a hydrothermal kettle, and treat it at a temperature of 160°C for 24 hours. After the reaction, the obtained precipitate was filtered, washed with deionized water and absolute ethanol five times each, and then dried at 60°C. Such as Figure 4 , due to the small amount of Ag, the characteristic peak of Ag cannot be clearly seen (AB-0.1) in the XRD spectrum, but in the UV / Visible diffuse reflectance spectrum, the bulging due to the surface plasmon resonance absorption of Ag can be seen ( Figure 5 ), and the peak of Ag can be seen ...

Embodiment 3

[0031] The Bi of embodiment 3Ni ion loading 2 WO 6 Preparation of materials and their application in photocatalytic antibacterial detection

[0032] The whole system is an ethylene glycol system, and 0.05M Bi(NO 3 ) 2 ·5H 2 O (analytical grade) and 0.05M Na 2 WO 4 2H 2 O (analytical pure) was stirred evenly, and 0.005M Ni(NO 3 ) 2 ·6H 2 O, stir for 10 minutes, mix well. Then take a certain volume of the precursor and put it into a hydrothermal kettle, and treat it at a temperature of 160°C for 24 hours. After the reaction, the obtained precipitate was filtered, washed with deionized water and absolute ethanol five times each, and then dried at 60°C. The product was identified as Ni / Bi by XRD and energy spectrum composition analysis 2 WO 6 , Ni loading Bi 2 WO 6 The photocatalytic antibacterial performance is greatly improved. After 30 minutes of light, the antibacterial rate reaches 99%. All the other are with embodiment 2.

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Abstract

The invention relates to a photocatalysis antibacterial material excited by visible light and an application thereof. The photocatalysis antibacterial material excited by visible light is characterized in that the noble metal of Pd, Pt, Au or Ag or any metal of Cu and Ni is loaded on a Bi2WO6 material in a form of nitrate when Bi2WO6 is generated to form a metal loaded Bi2WO6 material system. The loading content is controlled by adjusting the content of the loaded noble metal or any metal of the Ni and the Cu. The loaded metal content is 0.0025-0.05 M. The visible light photocatalysis antibacterial performance of the Bi2WO6 is greatly improved by combining the synergetic effect between the noble metal or any metal of the Ni and the Cu and a semiconductor and loading the noble metal on the surface of the Bi2WO6, and the illumination 30-min antibacterial rate reaches more than 99.9 percent. The loading process is simple, and the visible light photocatalysis antibacterial material is potential. The limit for increasing an ultraviolet light source when the photocatalysis material is applied in a room or outside the room is overcome, if sunlight is used as a light source, the utilization ratio of the sunlight can be also greatly improved.

Description

technical field [0001] The invention relates to a photocatalytic antibacterial material excited by visible light, which is used for sewage treatment, indoor and outdoor air purification and sterilization, as well as various building material fields such as coatings, glass, lamps, roads, and daily necessities. Background technique [0002] Since 1972, Fujishima (Nature, 238(1972), 37-38) discovered single crystal TiO for the first time 2 After being able to photocatalytically split water on the electrode, Carey et al. successfully made TiO 2 Used for photocatalytic degradation of organic pollutants in water, semiconductor photocatalysis has quickly attracted widespread attention from environmental and energy researchers in various countries. Due to some shortcomings of the traditional water disinfection technology, such as chlorination disinfection, research shows that it will produce toxic by-products that are harmful to human health, so the traditional water disinfection t...

Claims

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Application Information

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IPC IPC(8): B01J23/652B01J23/68B01J23/888B01J37/10A01N59/16A01N59/20A01P1/00
Inventor 王文中任佳
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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