Ag-embedding titanium oxide-bamboo charcoal composite powder and preparation method thereof

A technology of silver-loaded titanium dioxide and composite powder is applied in the fields of botanical equipment and methods, chemicals for biological control, animal repellents, etc. The effect of low cost, simple reaction process and low cost

Inactive Publication Date: 2016-01-06
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The product has good antibacterial and bactericidal effects on Escherichia coli, Staphylococcus aureus, white tinea, etc., but the nano-modified bamboo charcoal bactericidal material has not been modified by red shift, so the response wavelength is narrow, and it can only be used in ultraviolet light. It shows bactericidal properties under light, and the effect is extremely poor under visible light. In addition, this method also has the disadvantages of complicated procedures and high costs.

Method used

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  • Ag-embedding titanium oxide-bamboo charcoal composite powder and preparation method thereof
  • Ag-embedding titanium oxide-bamboo charcoal composite powder and preparation method thereof
  • Ag-embedding titanium oxide-bamboo charcoal composite powder and preparation method thereof

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Embodiment 1

[0035] Porous bamboo charcoal pretreatment: choose 450 mesh bamboo charcoal, first boil the bamboo charcoal with deionized water for 30 minutes, then wash and filter with deionized water, repeat this 3 times, remove the dust and surface residues in the bamboo charcoal, keep the temperature at 105°C Dry in a drying oven for later use.

[0036] Disperse 2.5g of silver-loaded titanium dioxide in deionized water. In the silver-loaded titanium dioxide, the mass ratio of silver to titanium dioxide is 2:100. Under an ultrasonic disperser, it is ultrasonically treated at a frequency of 20kHz for 2 hours to form a suspension. Heat to boiling in the bath pot, then add 50g of spare bamboo charcoal, continue to heat and boil, and stir vigorously for 2 hours, then take it out and put it in a constant temperature drying oven for drying at 105°C, and finally put the bamboo charcoal powder loaded with silver-loaded titanium dioxide into the high-temperature furnace Anaerobic calcination at 45...

Embodiment 2

[0040] Porous bamboo charcoal pretreatment: choose 450 mesh bamboo charcoal, first boil the bamboo charcoal with deionized water for 30 minutes, then wash and filter with deionized water, repeat this 3 times, remove the dust and surface residues in the bamboo charcoal, keep the temperature at 105°C Dry in a drying oven for later use.

[0041] Disperse 1.5g of silver-loaded titanium dioxide in deionized water. In the silver-loaded titanium dioxide, the mass ratio of silver to titanium dioxide is 3:100. Under an ultrasonic disperser, the frequency of 20kHz is ultrasonically treated for 2 hours to form a suspension. Heat to boiling in the bath pot, then add 50g of spare bamboo charcoal, continue to heat and boil, and stir vigorously for 2 hours, then take it out and put it in a constant temperature drying oven for drying at 105°C, and finally put the bamboo charcoal powder loaded with silver-loaded titanium dioxide into the high-temperature furnace Anaerobic calcination at 450°C fo...

Embodiment 3

[0043] Porous bamboo charcoal pretreatment: choose 300-mesh bamboo charcoal, boil it in deionized water for 20 minutes, take it out, wash it, filter it, repeat twice, and then dry it in a constant temperature drying oven at 105°C for later use.

[0044] Disperse 0.5g of silver-loaded titanium dioxide in deionized water. In the silver-loaded titanium dioxide, the mass ratio of silver to titanium dioxide is 3:100. Ultrasonic treatment at a frequency of 15kHz for 3h forms a suspension under an ultrasonic disperser, and the suspension is placed in an oil bath Heat the pot to boiling, then add 50g of spare bamboo charcoal, continue to heat and boil, stir vigorously, react for 1 hour, then take it out and put it in a constant temperature drying oven to dry at 105°C to obtain a coarse powder; then put the coarse powder into a high-temperature furnace Anaerobic calcination at 400°C for 3 hours to obtain silver-loaded titanium dioxide-bamboo charcoal composite powder.

[0045] Figure...

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Abstract

The invention relates to an Ag-embedding titanium oxide-bamboo charcoal composite powder and a preparation method thereof. The composite powder comprises Ag-embedding titanium oxide and porous bamboo charcoal, wherein the weight ratio of the Ag-embedding titanium oxide to the bamboo charcoal is 1-5:100 and is preferred to 3-5:100. The preparation method of the composite powder includes the steps that Ag-embedding titanium oxide is dispersed in deionized water, after a mixed solution is heated to boiling, bamboo charcoal is added, boiling is kept, reaction lasts for 1-3 h under the condition of strong stirring, then reaction products are calcined for a period of time in an oxygen insulating manner, and therefore the Ag-embedding titanium oxide-bamboo charcoal composite powder can be obtained. Compared with the prior art, the technology is simple, preparation cost is low, and the prepared composite powder has excellent bactericidal performance under visual light.

Description

technical field [0001] The invention relates to a modified bamboo charcoal and a preparation method thereof, in particular to a silver-loaded titanium dioxide-bamboo charcoal composite powder with bactericidal properties under visible light and a preparation method thereof. Background technique [0002] In recent years, due to the rapid development of industrialized society, environmental problems have become increasingly serious. In this regard, various materials and methods for sterilization, disinfection, and air quality improvement have been developed. Among them, bamboo charcoal is widely used as an adsorption material for water purification or air purification to adsorb toxic and harmful components and impurities contained in water and air due to its developed pore structure and strong adsorption capacity. However, when bamboo charcoal is used alone, it has its own defects, that is, the problem of physical adsorption saturation. Under the condition of repeated use, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01P1/00A01P3/00B01J23/50
Inventor 蒋正武陶志龙
Owner TONGJI UNIV
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