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Solar nitrogen fixation method and application of hydrotreated yttrium-deposited yttrium bromide

A technology of solar energy and nitrogen fixation, which is applied in the field of photocatalytic materials, can solve the problems of low solar nitrogen fixation ability, and achieve high quantum efficiency, excellent solar nitrogen fixation performance, and good solar nitrogen fixation performance.

Inactive Publication Date: 2019-01-25
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, conventional BiOBr still exhibits low solar nitrogen fixation capacity

Method used

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  • Solar nitrogen fixation method and application of hydrotreated yttrium-deposited yttrium bromide
  • Solar nitrogen fixation method and application of hydrotreated yttrium-deposited yttrium bromide
  • Solar nitrogen fixation method and application of hydrotreated yttrium-deposited yttrium bromide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Add 0.24g of bismuth nitrate pentahydrate and 0.102g of sodium bromide into 10mL of ethylene glycol solution, stir thoroughly for 20min until the solution becomes clear, then add 25mL of isopropanol solution, stir the mixed solution for 30min, add 1mL of thiourea solution, and stir for 5min Put it into a 1-2MPa high-pressure reactor, and conduct a constant temperature hydrothermal reaction at 160°C for 12 hours. The product was cooled to room temperature for centrifugation, washed with water and ethanol solution for 6 times, and dried at 60°C to collect the powder. Calcined at 200 °C and 360 mL / min hydrogen atmosphere for 4 h to obtain the final product H-Bi@BiOBr.

[0046] figure 1 It is the XRD diffraction pattern of the H-Bi@BiOBr photocatalyst obtained in this example, and compared with the PDF standard card, it is known that the obtained BiOBr is a tetragonal phase.

[0047] figure 2 It is the scanning electron microscope image of the H-Bi@BiOBr photocatalyst o...

Embodiment 2

[0053] Add 0.24g of bismuth nitrate pentahydrate and 0.102g of sodium bromide into 10mL of ethylene glycol solution, stir thoroughly for 20min until the solution becomes clear, then add 25mL of isopropanol solution, stir the mixed solution for 30min, add 1mL of thiourea solution, and stir for 5min Then put it into a 1-2MPa high-pressure reactor, and carry out a constant temperature hydrothermal reaction at 160°C for 12 hours. The product was cooled to room temperature for centrifugation, washed with water and ethanol solution for 6 times, and dried at 60°C to collect the powder. Calcined at 250 °C and 360 mL / min hydrogen atmosphere for 4 h, the final product H-Bi@BiOBr was obtained.

Embodiment 3

[0055] Add 0.24g of bismuth nitrate pentahydrate and 0.102g of sodium bromide into 10mL of ethylene glycol solution, stir thoroughly for 20min until the solution becomes clear, then add 25mL of isopropanol solution, stir the mixed solution for 30min, add 1mL of thiourea solution, and stir for 5min Then put it into a 1-2MPa high-pressure reactor, and carry out a constant temperature hydrothermal reaction at 160°C for 12 hours. The product was cooled to room temperature for centrifugation, washed with water and ethanol solution for 6 times, and dried at 60°C to collect the powder. Calcined at 150 °C and 360 mL / min hydrogen atmosphere for 4 h to obtain the final product H-Bi@BiOBr.

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PUM

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Abstract

The invention discloses a solar nitrogen fixation method and application of hydrotreated yttrium-deposited yttrium bromide. A catalyst of the method is the hydrotreated ruthenium ruthenium bromide, and a molecular formula is H-Bi@BiOBr, which is applied to a solar nitrogen fixation photocatalytic reaction using nitrogen as a nitrogen source and water as a reducing agent. The application method comprises the steps of adding 10-50 mg of photocatalyst H-Bi@BiOBr to 50-150 mL of water, maintaining the temperature at 10-25 DEG C, stirring for 20-60 min before photocatalysis, stirring for 40-120 minunder illumination, and filtering the catalyst with a filter having a pore diameter of 0.1-0.4 microns. Specifically, 20 mg of the photocatalyst H-Bi@BiOBr is added to 100 mL of water, the temperature is maintained at 15 DEG C, stirring is conducted for 30 min before photocatalysis, stirring is conducted for 60 min under illumination, and filtering is conducted on the catalyst with the filter with the pore size of 0.22 micron. The photocatalyst H-Bi@BiOBr used in the solar nitrogen fixation method is environmentally friendly, has wide sources of materials, low cost, controllable method and simple operation, can be mass-produced, has wide application, and has good solar nitrogen fixation performance.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, more specifically, to the preparation of a hydrotreated bismuth-deposited bismuth oxybromide (H-Bi@BiOBr) photocatalyst and the application of solar nitrogen fixation. Background technique [0002] As we all know, the traditional industrial nitrogen fixation uses the Haber method (300-600 ° C, 15-25 MPa), but hydrogen is needed as a raw material in the reaction process, and a catalyst is needed to promote the reaction. At the same time, it consumes a lot of energy and produces greenhouse gases. . In order to protect the environment and reduce energy consumption, new technologies are needed to replace the traditional nitrogen fixation process. In recent years, solar nitrogen fixation has attracted widespread attention, and it also provides a new method for nitrogen fixation. However, the solar nitrogen fixation technology did not bring satisfactory results. The main reasons are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J37/10B01J37/16B01J37/18C01C1/02
CPCC01C1/026B01J27/06B01J37/10B01J37/16B01J37/18B01J35/39Y02P20/52
Inventor 董晓丽华承贺王宇郑楠马红超张秀芳
Owner DALIAN POLYTECHNIC UNIVERSITY
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