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BiOXs pholocatalyst, grapheme-compounded BiOXs pholocatalyst and preparation method thereof

A photocatalyst and graphene technology, applied in the field of photocatalytic materials, can solve the problems affecting photocatalytic performance, material structure changes, etc., and achieve the effects of low production cost, simple production process and easy operation.

Inactive Publication Date: 2015-05-27
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Changes in the preparation conditions will lead to changes in the structure of the material, which in turn will affect its photocatalytic performance

Method used

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  • BiOXs pholocatalyst, grapheme-compounded BiOXs pholocatalyst and preparation method thereof
  • BiOXs pholocatalyst, grapheme-compounded BiOXs pholocatalyst and preparation method thereof
  • BiOXs pholocatalyst, grapheme-compounded BiOXs pholocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Put 0.005 mol of bismuth nitrate into 40 ml of a solution of ethylene glycol and glacial acetic acid with a volume ratio of 2:1, and magnetically stir for 0.5 hours to fully dissolve it to obtain a solution A. Then 0.005 mol NaBr (KBr can also be used) was added to 40 ml of anhydrous ethanol and deionized water solution with a volume ratio of 2:1, and magnetically stirred for 0.5 hours to fully dissolve it to obtain a B solution. Subsequently, the B solution was slowly added dropwise to the continuously stirred A solution. After the addition, the stirring was continued for 0.5 hours, and then the mixed solution was transferred to a 100ml PTFE-lined stainless steel reactor and reacted at 110°C for 10 hours After the reaction, the precipitate was filtered, washed three times with deionized water and absolute ethanol, and finally placed in an oven at 80°C and dried in vacuum for 8 hours. Grind into powder to obtain a sample whose chemical composition is BiOBr.

[0021] Photo...

Embodiment 2

[0023] Put 0.008 mol of bismuth nitrate into 40 ml of ethylene glycol and glacial acetic acid solution with a volume ratio of 3:1, and magnetically stir for 1 hour to fully dissolve it to obtain a solution A. Then 0.006 mol NaCl and 0.002 mol NaBr were added to 40 ml of anhydrous ethanol and deionized water solution with a volume ratio of 3:1, and magnetically stirred for 1 hour to fully dissolve it to obtain a B solution. Subsequently, the B solution was slowly added dropwise to the continuously stirring A solution. After the addition, the stirring was continued for 0.5 hours, and then the mixed solution was transferred to a 100ml PTFE-lined stainless steel reactor and reacted at 120°C for 12 hours After the reaction, the precipitate was filtered, washed three times with deionized water and absolute ethanol, and finally placed in an oven at 80°C and dried in vacuum for 8 hours. Grind into powder, get sample, its chemical composition is BiOCl 0.75 Br 0.25 .

[0024] Photocatalyt...

Embodiment 3

[0026] Put 0.006 mol of bismuth nitrate into 40 ml of ethylene glycol and glacial acetic acid solution with a volume ratio of 1:1, and magnetically stir for 1 hour to fully dissolve it to obtain a solution A. Then 0.006 mol NaCl was added to 40 ml of anhydrous ethanol and deionized water solution with a volume ratio of 1:1, and magnetically stirred for 1 hour to fully dissolve it to obtain a B solution. Subsequently, the B solution was slowly added dropwise to the continuously stirring A solution. After the addition, the stirring was continued for 0.5 hours, and then the mixed solution was transferred to a 100ml PTFE-lined stainless steel reactor and reacted at 120°C for 12 hours After the reaction, the precipitate was filtered, washed three times with deionized water and absolute ethanol, and finally placed in an oven at 80°C and dried in vacuum for 8 hours. Grind into powder to obtain a sample whose chemical composition is BiOCl.

[0027] Photocatalytic performance test: Put 2...

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Abstract

The invention relates to a BiOXs pholocatalyst, a grapheme-compounded BiOXs pholocatalyst and a preparation method thereof and relates to the field of photocatalytic materials. According to the invention, the BiOXs pholocatalyst is prepared by utilizing a solvent thermal method, so that the BiOXs pholocatalyst has excellent photocatalytic performances and is especially capable of efficiently degrading organic pollutants under visible light. Photocatalytic performances of the BiOXs pholocatalyst can be further improved by compounding with grapheme in-situ. The BiOXs pholocatalyst, the grapheme-compounded BiOXs pholocatalyst and the preparation method have the advantages of simple manufacturing process, simplicity in operation, low manufacturing cost, small pollution and one-step compounding process.

Description

Technical field [0001] The present invention belongs to the field of photocatalytic materials, and specifically relates to BiOXs photocatalysts, and also relates to a preparation method of the above-mentioned catalysts. Background technique [0002] Photocatalytic oxidation technology directly converts solar energy into chemical energy and electric energy through semiconductor photocatalytic materials, and completely mineralizes and degrades toxic and harmful organic pollutants in the environment. It is considered to be the most potential solution to human society energy and environmental problems. One of the technical solutions. At present, the main factors restricting the development of photocatalytic technology are low utilization of sunlight, high electron-hole pair recombination rate, and low light quantum efficiency. Due to the traditional titanium dioxide (TiO 2 ) The photocatalyst has a wide band gap (such as rutile TiO 2 3.0eV, anatase TiO 2 3.2 eV) and it can only resp...

Claims

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Application Information

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IPC IPC(8): B01J27/06C02F1/30
Inventor 宋金玲
Owner INNER MONGOLIA UNIV OF SCI & TECH
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