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Fe2O3/Sr2FeTaO6-x photocatalyst, preparation method and application thereof

A sr2fetao6-x, photocatalyst technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of high cost, difficult to achieve real bonding, material Problems such as difficulty in increasing body size

Active Publication Date: 2020-03-06
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mixing two kinds of semiconductor machinery makes it difficult to achieve real bonding at the interface, resulting in its efficiency still to be improved
2) Using the method of magnetron sputtering, the volume of the material prepared by this method is difficult to increase, and the cost is very high

Method used

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  • Fe2O3/Sr2FeTaO6-x photocatalyst, preparation method and application thereof
  • Fe2O3/Sr2FeTaO6-x photocatalyst, preparation method and application thereof
  • Fe2O3/Sr2FeTaO6-x photocatalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 30% Fe 2 o 3 / Sr 2 FeTaO 6-x Preparation of Photocatalyst and Evaluation of Nitrogen Oxide Degradation

[0049] (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;

[0050] (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;

[0051] (3) Add sodium hydroxide solution (8M), stir to dissolve, and the pH of the solution is 12 at this time.

[0052] (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;

[0053] (5) Sr obtained by step (4) 2 FeTaO 6 The powder sample is mixed with calcium hydride powder at a molar ratio of 1:10, ground, and mixed thoroughly. The above sample is moved to a muffle furnace, and...

Embodiment 2

[0064] Using the same method as in Example 1, the difference is: the Sr of 1g 2 FeTaO 6-x The sample powder was added to 1.25mL iron salt-ethanol aqueous solution to finally obtain 10% Fe 2 o 3 / Sr 2 FeTaO 6-x . The conversion rate of NO is around 65%

Embodiment 3

[0066] Using the same method as in Example 1, the difference is: the Sr of 1g 2 FeTaO 6-x The sample powder was added to 6.25mL iron salt-ethanol aqueous solution to finally obtain 50% Fe 2 o 3 / Sr 2 FeTaO 6-x . The conversion rate of NO is around 55-60%

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Abstract

The invention discloses a Fe2O3 / Sr2FeTaO6-x photocatalyst, a preparation method and application thereof. The preparation method includes the steps of: dissolving oleic acid in anhydrous ethanol, adding sodium oleate, then adding tantalum pentachloride, an organic ferric salt and an organic strontium salt, performing stirring, then carrying out hydrothermal reaction, and then conducting flushing and drying to obtain Sr2FeTaO6 powder; mixing the Sr2FeTaO6 powder with calcium hydride, and conducting calcination to obtain dark red Sr2FeTaO6-x; preparing a ferric salt ethanol water solution, addingSr2FeTaO6-x, stirring the substances violently, carrying out hydrothermal reaction, then performing natural cooling, and conducting washing and drying to obtain the Fe2O3 / Sr2FeTaO6-x photocatalyst. The invention provides a brand-new preparation method of the photocatalyst on the basis of a hydrothermal-calcium hydride modification method, the Fe2O3 / Sr2FeTaO6-x composite semiconductor system withhigh interfacial force can be finally synthesized, and photocatalytic degradation of nitric oxide is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, in particular to a Fe 2 o 3 / Sr 2 FeTaO 6-x Photocatalyst and its preparation method and application. Background technique [0002] Photocatalysis has a good degradation effect on air pollutants, and is considered to be one of the ideal methods for controlling air pollution. However, the existing catalysts are mainly effective for ultraviolet light (that is, wide-bandgap photocatalysts), and because photogenerated carriers have a high recombination rate in the bulk phase and surface of semiconductor materials, their photocatalytic performance is far from satisfactory. Therefore, how to effectively improve the separation and transfer efficiency of photogenerated carriers in semiconductor materials is very important to achieve photocatalytic control of air pollution. [0003] At present, there are mainly methods to improve the separation and transfer efficiency of photogenerated carrier...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847B01J37/10B01J37/16B01D53/86B01D53/56
CPCB01J23/002B01J23/8476B01J37/10B01J37/16B01J37/0018B01D53/8628B01J2523/00B01J35/39B01J2523/24B01J2523/57B01J2523/842
Inventor 王小三崔恩田李清萍殷祈王正超孙秋安吴玉礼侯贵华
Owner YANCHENG INST OF TECH
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