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Persimmon-shaped visible light catalyst biobr and preparation method thereof

A visible light and catalyst technology, which is applied in the field of photocatalysis and material chemistry, can solve the problems such as the influence of particle shape on the photocatalytic performance of samples, and achieve good visible light catalytic activity, simple production process and great market potential.

Inactive Publication Date: 2016-09-07
YULIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, factors such as the phase structure, grain size, and particle morphology of BiOX have a great influence on the photocatalytic performance of the sample.

Method used

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  • Persimmon-shaped visible light catalyst biobr and preparation method thereof
  • Persimmon-shaped visible light catalyst biobr and preparation method thereof
  • Persimmon-shaped visible light catalyst biobr and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 3 millimoles of bismuth nitrate pentahydrate and dissolve it in 8 mL of ethylene glycol, and stir evenly;

[0027] Weigh 6.5 mmol of cetyltrimethylammonium bromide and dissolve it in 15mL of ethylene glycol, and stir evenly;

[0028] Slowly add the solution obtained in step to the solution obtained in step , and stir for 30 minutes;

[0029] Weigh 0.5g of polyvinylpyrrolidone into the solution obtained in step , and stir for 30 minutes;

[0030] Transfer the mixture to a 50mL stainless steel hydrothermal kettle lined with polytetrafluoroethylene, add ethylene glycol to control the volume of the solution to 30mL, then let it stand and heat at 120°C for 10 hours;

[0031] After step finishes the reaction and cools down naturally, remove the upper liquid, vacuum filter and separate the solid product, wash the gained solid product with deionized water and absolute ethanol to neutrality respectively, then dry at 60°C for 20 hours, a white BiOBr solid powder w...

Embodiment 2

[0033] Weigh 5 mmoles of bismuth nitrate pentahydrate and dissolve it in 10 mL of ethylene glycol, and stir evenly;

[0034] Weigh 7 mmoles of cetyltrimethylammonium bromide and dissolve it in 15mL of ethylene glycol, and stir evenly;

[0035] Slowly add the solution obtained in step to the solution obtained in step , and stir for 30 minutes;

[0036] Weigh 0.7g of polyvinylpyrrolidone into the solution obtained in step , and stir for 30 minutes;

[0037] Transfer the mixture to a 50mL stainless steel hydrothermal kettle lined with polytetrafluoroethylene, add ethylene glycol to control the volume of the solution to 40mL, then let it stand and heat at 120°C for 12 hours;

[0038] After step finishes the reaction and cools down naturally, remove the upper layer liquid, vacuum filter and separate the solid product, wash the gained solid product with deionized water and absolute ethanol to neutrality respectively, then dry at 60°C for 24 hours, a white BiOBr solid powde...

Embodiment 3

[0040] Weigh 5 mmoles of bismuth nitrate pentahydrate and dissolve it in 10 mL of ethylene glycol, and stir evenly;

[0041] Weigh 7.5 millimoles of cetyltrimethylammonium bromide and dissolve it in 15mL of ethylene glycol, and stir evenly;

[0042] Slowly add the solution obtained in step to the solution obtained in step , and stir for 50 minutes;

[0043] Weigh 0.7g of polyvinylpyrrolidone into the solution obtained in step , and stir for 50 minutes;

[0044] Transfer the mixture to a 50mL stainless steel hydrothermal kettle lined with polytetrafluoroethylene, add ethylene glycol to control the volume of the solution to 40mL, then let it stand and heat at 120°C for 12 hours;

[0045] After step finishes the reaction and cools down naturally, remove the upper layer liquid, vacuum filter and separate the solid product, wash the gained solid product with deionized water and absolute ethanol to neutrality respectively, then dry at 80°C for 10 hours, a white BiOBr solid...

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Abstract

The present invention discloses a catalyst BiOBr persimmon like visible and its preparation method, the inventors solvothermal method using low temperature to control the morphology of the catalyst visible bismuth oxyhalides by controlling the amount of structure directing agent and adding a bismuth source and a source of bromine, for the first time We have successfully prepared a novel special morphology - BiOBr new efficient catalysts persimmon visible shape. The preparation method of the entire production process is simple, easy, low synthesis temperature, the reaction yield (89%), and environment-friendly raw materials, low cost, to meet the needs of the actual production. Visible catalyst of the invention has excellent visible light photocatalytic activity under visible light irradiation, a short time may be a variety of organic pollutants (methylene blue, methyl orange) completely degraded, corrosive catalyst is little light, better reusability , it can be applied to industrial production, in particular organic contaminants have better value using solar light catalytic decomposition, a large market potential.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis and material chemistry, and in particular relates to a persimmon-shaped visible light catalyst BiOBr and a preparation method thereof. Background technique [0002] Over the years, people have been interested in TiO 2 Various pathways of modification or sensitization have been carried out to enhance their response to visible light to enhance their photocatalytic activity. However, due to TiO 2 Due to its own properties, the application of modified photocatalytic materials is still greatly restricted, especially the shortage that ultraviolet light sources must be used. Therefore, finding new photocatalysts that can directly absorb visible light is of most interest to researchers. Bismuth oxyhalide BiOX (X=Cl, Br, I) is a new type of semiconductor material, which has a unique open structure and indirect transition mode, which is conducive to the effective separation and charge transfer of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/08B01J35/02C02F1/30C02F101/30B01J35/00
CPCY02W10/37
Inventor 陈渊朱万仁杨家添谢祖芳韦庆敏朱立刚庞起
Owner YULIN NORMAL UNIVERSITY
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