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Sr2FeTaO6 photocatalytic material as well as preparation method and application thereof

A photocatalytic material, tantalum pentachloride technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problem of low catalytic activity, high cost, reaction Higher equipment requirements and other issues, to achieve the effect of high catalytic activity, low cost, and easy control of the preparation process

Active Publication Date: 2020-01-24
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current preparation method of such materials is mainly based on high-temperature calcination, and the calcination temperature is between 800-1400 degrees (authorization numbers: CN 103146385B, CN100111975C, CN100352789C; application number: CN103545537 A), the prepared double calcium titanium The particle size of the ore material is in the micron range, resulting in low catalytic activity. The reported low-temperature preparation method is the high-temperature hydrothermal method (authorization number: CN 107824193B), and the reaction temperature is as high as 400 degrees Celsius, and the requirements for the reaction equipment are relatively high. , cost more

Method used

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  • Sr2FeTaO6 photocatalytic material as well as preparation method and application thereof
  • Sr2FeTaO6 photocatalytic material as well as preparation method and application thereof
  • Sr2FeTaO6 photocatalytic material as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Sr 2 FeTaO 6 Preparation of denitrification catalyst materials and evaluation of catalytic denitrification

[0034] (1) Dissolve 7.5ml of oleic acid in 52.5ml of absolute ethanol, then add 300mg of sodium oleate, stir well to make it completely dissolve;

[0035] (2) Add 1.074g of tantalum pentachloride to the above solution, then add 1.059g of iron acetylacetonate and 1.234g of strontium acetate, and stir for about 12 hours to completely dissolve it;

[0036] (3) Add sodium hydroxide solution (8M), stir to dissolve, and the pH of the solution is 12 at this time.

[0037] (4) Add the solution to a hydrothermal kettle for hydrothermal reaction at 200°C, heat the reaction for 12 hours, rinse with absolute ethanol and water, and dry to obtain Sr 2 FeTaO6 Powder;

[0038] The Sr of its step (4) 2 FeTaO 6 The TEM and XRD images of the powder are as follows figure 1 and figure 2 as shown, figure 1 for Sr 2 FeTaO 6 topography of the material, figure 2 It shows th...

Embodiment 2

[0046] (1) Dissolve 17.5ml of oleic acid in 100mL of absolute ethanol, then add 500mg of sodium oleate, stir well to make it completely dissolve;

[0047] (2) Add 2.148g of tantalum pentachloride to the above solution, then add 2.118g of iron acetylacetonate and 1.234g of strontium acetate, and stir for about 12 hours to completely dissolve it;

[0048] (3) Add sodium hydroxide solution (8M) and stir to dissolve; the pH of the solution is now 14.

[0049] (4) Add the solution to a hydrothermal kettle for hydrothermal reaction at 200°C, heat the reaction for 12 hours, rinse with absolute ethanol and water, and dry to obtain Sr 2 FeTaO 6 Powder;

[0050] The conversion rate of NO measured in this embodiment is above 57.6%.

Embodiment 3

[0052] (1) Dissolve 5ml of oleic acid in 10mL of absolute ethanol, then add 200mg of sodium oleate, stir well to make it completely dissolve;

[0053] (2) Add 2.148g of tantalum pentachloride to the above solution, then add 1.059g of iron acetylacetonate and 1.234g of strontium acetate, and stir for about 12 hours to completely dissolve it;

[0054] (3) Add sodium hydroxide solution (8M) and stir to dissolve; at this time, the pH of the solution is 10.

[0055] (4) Add the solution to a high-pressure hydrothermal kettle for hydrothermal reaction at 200°C, heat the reaction for 12 hours, rinse with absolute ethanol and water, and dry to obtain Sr 2 FeTaO 6 Powder.

[0056] The conversion rate of NO measured in this embodiment is above 55.5%. .

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Abstract

The invention discloses a Sr2FeTaO6 photocatalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) dissolving oleic acid into absolute ethyl alcohol, further adding sodium oleate, and performing sufficient stirring; (2) adding tantalum pentachloride to the solution, further adding an organic iron salt and organic strontiumsalt, and performing stirring to dissolve the components completely; (3) adding sodium hydroxide to adjust the pH value of the solution; and (4) adding the solution to a hydrothermal kettle, performing a hydrothermal reaction, after the reaction is completed, performing repeated rinsing by using absolute ethyl alcohol and water, and performing drying, so as to obtain Sr2FeTaO6 powder. Sr2FeTaO6 prepared by using an oleic acid-sodium oleate system is an environment-friendly iron-containing catalyst for photocatalytic degradation of nitrogen oxides in the atmosphere and has the advantages of being wide in reaction window temperature, high in catalytic activity, free of pollution, and the like, and the material is applied to denitration at room temperature and has a high conversion rate of NOx gases such as NO.

Description

technical field [0001] The invention belongs to the technical field of denitrification photocatalyst at normal temperature, and specifically relates to a Sr 2 FeTaO 6 Photocatalytic nanomaterials and their preparation methods and applications. Background technique [0002] Nitrogen oxides (NOx) include a variety of compounds, but the main components are NO and NO 2 . NOx emitted by human activities is mainly produced by fuel combustion and chemical industry production, such as fixed sources of fuel combustion such as thermal power plants, chemical plants, and steel plants, and mobile sources such as motor vehicles. In addition, a small amount of NOx is also produced in industrial production process and residential life. NOx is not only highly toxic to humans, animals and plants, but also the main cause of acid rain, smog and photochemical smog, and also participates in the destruction of the ozone layer. The control and treatment of nitrogen oxide pollution has always b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847B01D53/86B01D53/56
CPCB01J23/002B01J23/8476B01D53/8628B01J2523/00B01D2258/0283B01J35/39B01J2523/24B01J2523/57B01J2523/842
Inventor 冒爱荣崔恩田孙秋安吴玉礼王正超侯贵华
Owner YANCHENG INST OF TECH
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