Method for preparing carbon-doped bismuth oxychloride nanoflower powder

A technology of bismuth oxychloride and nanoflowers, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of complex preparation process, low photocatalytic efficiency, and high preparation cost, and achieve product efficiency High, increased specific surface area, simple operation

Inactive Publication Date: 2019-04-02
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing carbon-doped bismuth oxychloride nanoflower powder, which solves the problems of narrow response range, complex preparation process, high preparation cost and low photocatalytic efficiency of the existing single BiOCl material

Method used

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  • Method for preparing carbon-doped bismuth oxychloride nanoflower powder
  • Method for preparing carbon-doped bismuth oxychloride nanoflower powder

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Embodiment 1

[0025] Step 1, preparation of carbon-doped bismuth oxychloride nanoflower powder

[0026] Bismuth nitrate pentahydrate and nickel chloride were weighed according to the molar ratio of Bi:Cl of 1:1, each placed in glycerol, ultrasonic 20min to completely dissolve the solute in the solvent and disperse evenly, bismuth nitrate pentahydrate and glycerine The mass volume ratio of alcohol is 0.02g / ml, and the mass volume ratio of nickel chloride and glycerol is 0.004g / ml. Mix the dispersed bismuth nitrate pentahydrate solution and nickel chloride solution in a clean polytetrafluoroethylene lining, add a magnetic stirring rotor and stir with strong magnetic force for 30 minutes to disperse the mixed solution evenly, and then take out the rotor. The resulting mixture was transferred into a matching stainless steel reaction kettle, and then placed in an oven with water heating at 160°C for 12 hours. After air-cooling in the furnace, the obtained solid-liquid mixture was taken out, and...

Embodiment 2

[0032] Bismuth nitrate pentahydrate and nickel chloride were respectively weighed according to the molar ratio of Bi:Cl of 1:2, each placed in glycerol, ultrasonic 25min to completely dissolve the solute in the solvent and disperse evenly, bismuth nitrate pentahydrate and propane The mass volume ratio of triol is 0.04g / ml, and the mass volume ratio of nickel chloride and glycerol is 0.006g / ml. Mix the dispersed bismuth nitrate pentahydrate solution and nickel chloride solution in a clean polytetrafluoroethylene lining, add a magnetic stirring rotor and stir with strong magnetic force for 35 minutes to disperse the mixed solution evenly, and then take out the rotor. The resulting mixture was transferred into a matching stainless steel reaction kettle, and then placed in an oven with water heating at 150°C for 14 hours. After air-cooling in the furnace, the obtained solid-liquid mixture was taken out, and washed four times by centrifugation with deionized water and absolute etha...

Embodiment 3

[0038]Bismuth nitrate pentahydrate and nickel chloride were respectively weighed according to the molar ratio of Bi:Cl of 1:3, each placed in glycerol, and the solute was completely dissolved in the solvent and dispersed evenly by ultrasonication for 30 minutes. The mass volume ratio of triol is 0.03g / ml, and the mass volume ratio of nickel chloride and glycerol is 0.005g / ml. Mix the dispersed bismuth nitrate pentahydrate solution and nickel chloride solution and place them in a clean polytetrafluoroethylene lining, add a magnetic stirring rotor and stir with strong magnetic force for 40 minutes to disperse the mixed solution evenly, and then take out the rotor. The resulting mixed solution was transferred into a matching stainless steel reaction kettle, and then placed in an oven with water heating at 170°C for 10 hours. After air-cooling in the furnace, the obtained solid-liquid mixture was taken out, and washed by centrifugation with deionized water and absolute ethanol for...

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Abstract

The invention discloses a method for preparing a carbon-doped bismuth oxychloride nanoflower powder. The method specifically comprises the steps of adding bismuth nitrate pentahydrate and nickel chloride to glycerol for dissolution separately , and then uniformly mixing the two solutions; placing the mixed solution in an oven for hydrothermal reaction to obtain a solid-liquid mixture; and washingthe solid-liquid mixture and conducting drying to obtain the carbon-doped bismuth oxychloride nanoflower powder. According to the invention, the carbon-doped bismuth oxychloride nanoflower powder is prepared by conducting a one-step hydrothermal process on a common chemical raw material bismuth nitrate pentahydrate and nickel chloride. The obtained bismuth oxychloride powder have a flower-like structure formed by gathering of a nano-scale layer structure, so that the specific surface area and the reactive active site of the material are increased, the photodegradation efficiency of the material is significantly improved, meanwhile carbon element introduced by the doped solvent glycerol changes the energy band structure and the forbidden band width of the material, and extends the spectralresponse range of the material to a visible light region, and thus the application limitation of a single bismuth oxychloride material is broken.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic material preparation, and in particular relates to a preparation method of carbon-doped bismuth oxychloride nanoflower powder. Background technique [0002] As a new type of triple oxide semiconductor photocatalyst, BiOCl has been widely used in the fields of medicine, pigments, optics and clean energy due to its open structure, low oil absorption, low preparation cost, green and non-toxic, and high chemical stability. It is composed of two chloride ion layers surrounded by a [Bi 2 o 2 ] 2+ The sandwich structure formed by layers, its wide interlayer space, large specific surface area and abundant active groups all provide a theoretical basis for its application in the field of photocatalysis. However, the indirect band gap of a single BiOCl is about 3.2eV, which only responds in the ultraviolet region, which seriously restricts its development in the field of photocatalysis, so it is pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/128B01J35/02
CPCB01J27/128B01J35/004B01J35/023
Inventor 孙少东陶莎莎梁淑华崔杰杨卿
Owner XIAN UNIV OF TECH
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