Visible-light response photocatalyst and application, preparation method and using method thereof

A photocatalyst and visible light technology, applied in the field of photocatalytic materials, can solve problems such as low organic matter degradation ability, and achieve the effect of high quantum efficiency, broad application prospects, and good visible light photocatalytic degradation of organic matter performance.

Inactive Publication Date: 2018-12-14
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, traditional BiOBr still exhibits low organic matter degradation ability

Method used

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  • Visible-light response photocatalyst and application, preparation method and using method thereof
  • Visible-light response photocatalyst and application, preparation method and using method thereof
  • Visible-light response photocatalyst and application, preparation method and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 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 carry out a constant temperature hydrothermal reaction at 160°C for 12h. The product was cooled to room temperature for centrifugation and washed 6 times with water and ethanol solution, 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.

[0049] 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.

[0050] figure 2 It is the scanning electron microscope image of the H-Bi@BiOBr photocatalyst obtai...

Embodiment 2

[0056] 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 12h. The product was cooled to room temperature for centrifugation and washed 6 times with water and ethanol solution, 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

[0058] 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 12h. The product was cooled to room temperature for centrifugation and washed 6 times with water and ethanol solution, 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 visible-light response photocatalyst, namely bismuth hydride deposited bismuth oxybromide with the molecular formula of H-Bi@BiOBr for visible-light photocatalysis degradation of organic matter in the water body. The preparation method of the catalyst comprises the following steps: 1, organic alcohol is taken as a solvent; 2, a bismuth salt compound and a bromine salt compound are added into the organic alcohol solvent, mixed and fully stirred; 3, after the solution is stirred to be clear, a neutral solution and a certain quantity of reducing agents are added, stirring is carried out, and then the solution is put into a reaction kettle to conduct a thermostatic reaction; 4, the solution is cooled to a room temperature, subjected to centrifugal separation and washed with water and an ethanol solution for multiple times, and a powder is collected after drying; and 5, calcination is carried out in a hydrogen atmosphere, and the bismuth hydride deposited bismuth oxybromide is obtained. The bismuth hydride deposited bismuth oxybromide photocatalyst obtained through the preparation method is environmentally friendly, harmless, material sources are widely available, the price is low, the method is controllable and easy to operate, and the photocatalyst can be mass produced and has good photocatalysis performance on degradation of the organic matter.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, more specifically, to the preparation and application of a bismuth hydride-deposited bismuth oxybromide (H-Bi@BiOBr) visible light-responsive organic matter degradation photocatalyst. Background technique [0002] As we all know, organic matter in water, especially dyes and antibiotic pollutants seriously affect the quality of water, damage the environment, and threaten human health. Although the traditional biological treatment method can treat organic matter in water well, it increases the treatment cost due to the specificity of microorganisms. In addition, the biological treatment method has a long process and difficult maintenance. Compared with biological treatment methods, photocatalytic oxidation technology has attracted widespread attention because of its environmental protection, low consumption and thorough treatment. However, due to the low quantum efficiency of sem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J37/10B01J37/08C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J27/06B01J35/004B01J37/082B01J37/10C02F1/30C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2101/40C02F2305/10
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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