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Method sed for degrading organic matters with photocatalyst BiOI/BiOBr/CNFs and applications thereof

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

Inactive Publication Date: 2019-02-01
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the layered structure of bismuth oxyhalide (BiOX) is conducive to the separation of photogenerated electrons and holes, its band gap is narrow, the light absorption range is wide, and the production process is simple, cheap, non-toxic, etc.
Nevertheless, traditional BiOX still exhibits low organic matter degradation ability

Method used

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  • Method sed for degrading organic matters with photocatalyst BiOI/BiOBr/CNFs and applications thereof
  • Method sed for degrading organic matters with photocatalyst BiOI/BiOBr/CNFs and applications thereof
  • Method sed for degrading organic matters with photocatalyst BiOI/BiOBr/CNFs and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Add 0.48g of bismuth nitrate pentahydrate, 0.0612g of sodium bromide and 0.0664g of potassium iodide to 10mL of ethylene glycol solution, stir well for 20min to a clear solution, then add 60mL of ethanol solution, stir the mixed solution for 30min, add 0.03g of CNFs solution, ultrasonic for 5min Then, it is put into a 1~2MPa autoclave and carries out a constant temperature hydrothermal reaction at 160°C for 12 hours. The product was cooled to room temperature for centrifugal separation, washed with water and ethanol solution 6 times, and dried at 60°C to collect the powder to obtain the final product BiOI / BiOBr / CNFs.

[0056] figure 1 It is the XRD diffraction pattern of the BiOI / BiOBr / CNFs photocatalyst obtained in this example. After comparing with the PDF standard card, it is known that the obtained BiOBr and BiOI are quadrangular phases.

[0057] figure 2 This is a scanning electron micrograph of the BiOI / BiOBr / CNFs photocatalyst obtained in this example, and the obtain...

Embodiment 2

[0063] Add 0.48g of bismuth nitrate pentahydrate, 0.0816g of sodium bromide and 0.0332g of potassium iodide to 10mL of ethylene glycol solution, stir well for 20min to a clear solution and then add 60mL of ethanol solution, stir the mixed solution for 30min, add 0.03g of CNFs solution, ultrasonic for 5min Then, it is put into a 1~2MPa autoclave and carries out a constant temperature hydrothermal reaction at 160°C for 12 hours. The product was cooled to room temperature for centrifugal separation, washed with water and ethanol solution 6 times, and dried at 60°C to collect the powder to obtain the final product BiOI / BiOBr / CNFs.

Embodiment 3

[0065] Add 0.48g of bismuth nitrate pentahydrate, 0.0408g of sodium bromide and 0.0996g of potassium iodide to 10mL of ethylene glycol solution, stir well for 20min to a clear solution and then add 60mL of ethanol solution, stir the mixed solution for 30min, add 0.03g of CNFs solution, ultrasonic for 5min Then, it is put into a 1~2MPa autoclave and carries out a constant temperature hydrothermal reaction at 160°C for 12 hours. The product was cooled to room temperature for centrifugal separation, washed with water and ethanol solution 6 times, and dried at 60°C to collect the powder to obtain the final product BiOI / BiOBr / CNFs.

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Abstract

The invention discloses a method used for degrading organic matters with a photocatalyst and applications thereof. The photocatalyst is nanometer carbon fiber supported bismuth oxybromide bismuth oxyiodide, and the structure formula is BiOI / BiOBr / CNFs, and is used for visible light photocatalysis degradation of organic matters in water. According to an application method, 5 to 30mg of the photocatalyst BiOI / BiOBr / CNFs is added into 40 to 150mL of 5 to 50mg / L organic matter solution, room temperature is maintained, stirring is carried out for 20 to 60min without light, stirring is carried out for 40 to 150min under visible light illumination, and a filter with a pore size of 0.1 to 0.4<mu>m is adopted to remove the catalyst; especially, 20mg of photocatalyst H-Bi@BiOBr is added into each 100ml of water, the temperature is maintained at 15 DEG C, before photocatalysis, stirring is carried out for 30min, then stirring is carried out for 60min under light illumination, and a filter with apore size of 0.22<mu>m is adopted to remove the catalyst. According to the method, the BiOI / BiOBr / CNFs photocatalyst is nontoxic, and is cheap; the method can be controlled; operation is simple; obvious organic matter degradation effect is achieved; and the application prospect in the field of environment pollution and treatment is promising.

Description

Technical field [0001] The invention relates to the technical field of photocatalytic materials, and more specifically, to the preparation and application of a nano carbon fiber supported bismuth bromide oxybromide bismuth iodide (BiOI / BiOBr / CNFs) photocatalyst to degrade organic matter. Background technique [0002] As we all know, with the development of textile printing and dyeing technology, the process of industrialization of light and textile industry is promoted, but the discharge of printing and dyeing wastewater is also increased. Organic matter in printing and dyeing wastewater, especially dye pollutants, seriously affects the quality of water bodies, destroys the environment, and threatens human health. Due to the large changes in water quality and quantity of printing and dyeing wastewater, large chroma, and high COD / BOD concentration, traditional biological treatment methods are difficult to treat such wastewater, and chemical methods are likely to cause secondary po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J35/06C02F1/30C02F101/30C02F101/34C02F101/38
CPCC02F1/30B01J27/06C02F2305/10C02F2101/308C02F2101/38C02F2101/34B01J35/58B01J35/39
Inventor 董晓丽华承贺郑楠王宇马红超张秀芳
Owner DALIAN POLYTECHNIC UNIVERSITY
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