Method of producing visible light photocatalysis sterilization antimicrobials agent

A technology of photocatalysis and antibacterial agent, which is applied in the direction of fungicides, botany equipment and methods, biocides, etc., and can solve the problem of the decrease of photocatalytic efficiency, the sterilization and antibacterial process must be realized under the action of ultraviolet light, and the preparation conditions are difficult to control, etc. problems, to achieve the effect of enhanced ability

Inactive Publication Date: 2009-11-04
XIAMEN UNIV
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Problems solved by technology

Chinese patent ZL02119304.5 discloses a preparation method of mesoporous titanium dioxide film with high bactericidal photoactivity, which is used for the sterilization of seawater, tap water and other water quality, but the bactericidal and antibacterial process must be realized under the action of ultraviolet light
Kang Zhenjin et al prepared oxygen-deficient La by doping modification 1-x Sr x COO 3-δ It can improve the photocatalytic efficiency, but excessive doping will reduce the photocatalytic efficiency, and the preparation conditions are difficult to control

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  • Method of producing visible light photocatalysis sterilization antimicrobials agent
  • Method of producing visible light photocatalysis sterilization antimicrobials agent

Examples

Experimental program
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Embodiment 1

[0016] Example 1: LaCoO 2.975

[0017] Weigh lanthanum nitrate (La(NO 3 ) 3 .6H 2 O) 8.64g, cobalt nitrate (Co(NO 3 ) 2 .6H 2 (2) 5.81g, be mixed with concentration and be 0.1M solution 200ml, then by total metal nitrate and citric acid mol ratio 1: 0.6, take by weighing citric acid (C 6 h 8 o 7 .H 2 O) 3.02g was added to the above solution to make a sol, irradiated under an infrared lamp for 8h to obtain a gel, transferred to a muffle furnace for pre-calcination at 400°C for 3h, and finally calcined at 750°C for 5h to obtain LaCoO 3 4.52g. LaCoO 3 Put 4.52g into the atmosphere furnace, the rest is N in 10% CO 2 Under the reducing atmosphere of 500°C for 6h, LaCoO was obtained 2.975 . . From figure 1 It can be seen from the X-ray polycrystalline electron diffraction figure that the characteristic diffraction peak of the prepared bactericidal and antibacterial agent sample is a perovskite structure. From figure 2 It can be seen that the bactericide has a very...

Embodiment 2

[0019] Example 2: La 0.9 Sr 0.1 CoO 2.975

[0020] Weigh lanthanum nitrate (La(NO 3 ) 3 .6H 2 O) 7.78g, strontium nitrate (Sr(NO 3 ) 2 )0.42g, cobalt nitrate Co(NO 3 ) 2 .6H 2 O 5.81g is made into 0.05M solution 400ml, takes by weighing citric acid 6.05g and adds in the above-mentioned solution to make sol according to total metal nitrate and citric acid molar ratio 1: 1.2, acts on 12h under infrared light and makes gel, then in Pre-calcined at 500°C for 2 hours, and calcined at 850°C for 4 hours to obtain the photocatalytic bactericidal material La 0.9 Sr 0.1 CoO 3 4.56g. La 0.9 Sr 0.1 CoO 3 4.56g is put into the atmosphere furnace, at 30ml / min (10%H 2 The rest is N 2 ) under the action of 600°C for 4 hours, La 0.9 Sr 0.1 CoO 2.975 .

[0021] In 5ml containing Escherichia coli or Staphylococcus aureus bacterial liquid concentration is 10 6 Add 0.015g perovskite La to CFU / ml culture medium 0.9 Sr 0.1 CoO 2.975 Catalyst was irradiated for 30min, and al...

Embodiment 3

[0026] Example 3: La 0.92 Sr 0.08 CoO 2.995

[0027] Weigh lanthanum nitrate (La(NO 3 ) 3 .6H 2 O) 8.41g, strontium nitrate (Sr(NO 3 ) 2 )0.34g, cobalt nitrate Co(NO 3 ) 2 .6H 2O 5.81g is made into 0.08M solution 250ml, weighs 4.03g of citric acid according to the total metal nitrate and citric acid molar ratio 1: 0.8 and joins in the above-mentioned solution to make a sol, acts under an infrared lamp for 10h to make a gel, and then Precalcined at 450°C for 2.5 hours, and calcined at 800°C for 4 hours to obtain the photocatalytic bactericidal material La 0.92 Sr 0.08 CoO 3 4.47g. La 0.92 Sr 0.08 CoO 3 4.47g is put into the atmosphere furnace, at 30ml / min (7%H 2 The rest is N 2 ) under the action of 500 ° C reduction for 5 hours, to obtain La 0.92 Sr 0.08 CoO 2.995 .

[0028] Measure the bactericidal rate by the method of embodiment 1, the results are shown in Table 1 and Table 2.

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Abstract

The invention discloses a preparation method of a photocatalytic bactericidal and antibacterial agent under visible light, and relates to a bactericidal and antibacterial agent. Provide a method for preparing a photocatalytic bactericidal and antibacterial agent under visible light using a perovskite-type inorganic bactericidal and antibacterial material by reducing the rare earth perovskite in a reducing atmosphere to obtain moderate oxygen vacancies. The prepared bactericidal and antibacterial agent is used in It has bactericidal and antibacterial activity under normal indoor lighting. Prepare lanthanum nitrate, strontium nitrate and cobalt nitrate in molar ratio (1-X): X: 1 to prepare a solution of 0.05-0.1M; 1.2), the complexing agent is mixed with the prepared nitrate solution to form a sol, and dried into a gel; the gel is calcined in advance, and then calcined to obtain the perovskite La1-xSrxCoO3; the perovskite obtained after calcining Put it in a reducing atmosphere furnace and treat it with a reducing gas to obtain the product.

Description

technical field [0001] The invention relates to a bactericidal and antibacterial agent, in particular to a method for preparing a photocatalytic bactericidal and antibacterial agent under visible light using a perovskite-type inorganic bactericidal and antibacterial material. Background technique [0002] Since the discovery of the photocatalytic phenomenon of titanium dioxide, patents on the use of titanium dioxide to photocatalytically degrade wastewater, purify air, and kill bacteria have appeared one after another. Chinese patent ZL02119304.5 discloses a preparation method of mesoporous titanium dioxide film with high bactericidal photoactivity, which is used for the sterilization of seawater, tap water and other water quality, but the bactericidal and antibacterial process must be realized under the action of ultraviolet light. Chinese patent ZL02154431.X discloses a nano photocatalyst antibacterial composition for antibacterial method, using nanocomposite TiO containin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/16A01N25/00A01P3/00
Inventor 贾立山李清彪方维平叶庆华唐勇
Owner XIAMEN UNIV
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