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Preparation method of halogen bismuth oxide nitrogen fixation photocatalysts with three-dimensional structure

A bismuth oxyhalide and photocatalyst technology, which is applied in the field of new energy material preparation, can solve the problems of difficulty in large-scale production, serious environmental pollution, and high cost, and achieve the effects of high solar energy utilization efficiency, simple preparation process, and low cost

Inactive Publication Date: 2019-06-18
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chemical nitrogen fixation solves the deficiency of biological nitrogen fixation, but it has high cost, long process, high energy consumption and serious environmental pollution
Biological nitrogen fixation can be carried out under milder conditions, but only occurs in a few plants and microorganisms, making it difficult to achieve large-scale production

Method used

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  • Preparation method of halogen bismuth oxide nitrogen fixation photocatalysts with three-dimensional structure
  • Preparation method of halogen bismuth oxide nitrogen fixation photocatalysts with three-dimensional structure
  • Preparation method of halogen bismuth oxide nitrogen fixation photocatalysts with three-dimensional structure

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Embodiment 1

[0039] A three-dimensional hollow photocatalytic nitrogen fixation catalyst Bi 5 o 7 The preparation method of I, comprises the steps:

[0040] (1) Weigh 5g of glucose and place it in 60ml of deionized water, and obtain a uniform glucose aqueous solution after magnetic stirring;

[0041] (2) Transfer the aqueous glucose solution of step (1) to a 100ml reactor, carry out a hydrothermal reaction at a temperature of 180°C for 12h, then wash the product of the hydrothermal reaction with deionized water and ethanol respectively, and Centrifuge 4 times at 6000 rpm for 5 minutes, then dry at 60°C for 24 hours to obtain mesophase carbon microspheres;

[0042] (3) 0.5 g of the mesophase carbon microspheres obtained in step (2) is weighed and placed in a beaker containing 200 ml and a concentration of 1.5 mol / L of acetic acid aqueous solution, and then magnetically stirred to make it evenly dispersed;

[0043] (4) Add 0.02mol of Bi(NO 3 ) 3 ·5H 2 0, until completely dissolving, th...

Embodiment 2

[0047] A three-dimensional hollow photocatalytic nitrogen fixation catalyst Bi 5 o 7 The preparation method of I, comprises the steps:

[0048] (1) Weigh 3g of glucose and place it in 30ml of deionized water, and obtain a uniform glucose aqueous solution after magnetic stirring;

[0049] (2) Transfer the aqueous glucose solution of step (1) to a 50ml reactor, carry out a hydrothermal reaction at a temperature of 180°C for 12h, then wash the product of the hydrothermal reaction with deionized water and ethanol respectively, and Centrifuge 4 times at 6000 rpm for 5 minutes, then dry at 60°C for 24 hours to obtain mesophase carbon microspheres;

[0050] (3) 0.4 g of the mesophase carbon microspheres obtained in step (2) is weighed and placed in a beaker containing 120 ml and a concentration of 1.2 mol / L of acetic acid aqueous solution, and then magnetically stirred to make it evenly dispersed;

[0051] (4) Add 0.015mol of Bi(NO 3 ) 3 ·5H 2 0, until fully dissolved, add 0.01...

Embodiment 3

[0055] A three-dimensional hollow photocatalytic nitrogen fixation catalyst Bi 5 o 7 The preparation method of I, comprises the steps:

[0056] (1) Weigh 6g of glucose and place it in 60ml of deionized water, and obtain a uniform glucose aqueous solution after magnetic stirring;

[0057] (2) Transfer the aqueous glucose solution of step (1) to a 100ml reactor, carry out a hydrothermal reaction at a temperature of 180°C for 12h, then wash the product of the hydrothermal reaction with deionized water and ethanol respectively, and Centrifuge 4 times at 6000 rpm for 5 minutes, then dry at 60°C for 24 hours to obtain mesophase carbon microspheres;

[0058] (3) 0.3 g of the mesophase carbon microspheres obtained in step (2) is weighed and placed in 60 ml of acetic acid aqueous solution with a concentration of 1 mol / L, and magnetically stirred to uniformly disperse it;

[0059] (4) Add 0.01mol of Bi(NO 3 ) 3 ·5H 2 0, add 0.01mol of KI after dissolving completely, obtain brown p...

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Abstract

The invention discloses a preparation method of halogen bismuth oxide nitrogen fixation photocatalysts with a three-dimensional structure. The preparation method comprises following steps: 1, a glucose aqueous solution is prepared; 2, hydro-thermal reaction, washing, centrifugation, and drying are carried out; 3, an obtained product is added into an acetic acid aqueous solution, and magnetic stirring is carried out; 4, Bi(NO3)3 5H2O is added, after complete dissolving, a halogeno salt of the same molar amount is added so as to obtain a brown precipitate; and 5, drying and sintering are carriedout so as to obtain the halogen bismuth oxide nitrogen fixation photocatalyst with a three-dimensional structure. According to the preparation method, template method is adopted to prepare a plurality of nitrogen fixation photocatalysts, preparation technology is simple, energy consumption is low, different halogeno salts can be adopted to prepare samples of a three-dimensional structure respectively, product purity is high, the morphology is uniform, the dispersibility is excellent, the performance is stable, and the circulation performance is excellent.

Description

technical field [0001] The invention relates to a preparation method of a photocatalytic nitrogen fixation catalyst, in particular to a preparation method of a bismuth oxyhalide nitrogen fixation photocatalyst with a three-dimensional structure, and belongs to the field of new energy material preparation. Background technique [0002] Ammonia is one of the important inorganic chemical products and has broad application prospects. Not only the synthesis of urea, ammonium phosphate and various nitrogen-containing compound fertilizers used in agriculture requires ammonia as a raw material; but also nitrogen-containing and organic intermediates, sulfonamides, polyurethane and polyamide fibers commonly used in industry require ammonia as a raw material. Raw materials; In addition, ammonia is an important raw material for the synthesis of trinitrotoluene, nitroglycerin, nitrocellulose and other materials commonly used in the defense industry. With the development of agriculture, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06C01C1/04C01G29/00
CPCY02P20/52
Inventor 李建伟马雪康邓文星李婧祎冯雨毛宇杰赵新生
Owner XUZHOU NORMAL UNIVERSITY
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