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Visible-light-induced photocatalyst Bi4O5Br2 and preparation method thereof

A bi4o5br2, visible light technology, applied in the field of photocatalysis and material chemistry, can solve problems such as limiting practical application, and achieve the effects of improving photocatalytic performance, good visible light catalytic activity, and simple production process

Inactive Publication Date: 2014-12-24
YULIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to TiO 2 It is a wide-bandgap semiconductor that can only respond to ultraviolet light irradiation of λ<380nm, which severely limits its practical application in sunlight or indoor lighting environments, because these light sources mainly emit visible light

Method used

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  • Visible-light-induced photocatalyst Bi4O5Br2 and preparation method thereof
  • Visible-light-induced photocatalyst Bi4O5Br2 and preparation method thereof
  • Visible-light-induced photocatalyst Bi4O5Br2 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 2.0 grams of bismuth nitrate pentahydrate and dissolve it in 1.5 mL of concentrated nitric acid, add a small amount of water to dilute to 10 mL, and stir evenly;

[0026] Weigh 0.5 g of cetyltrimethylammonium bromide, dissolve it in 10 mL of deionized water, and stir evenly;

[0027] Slowly add the solution obtained in step to the solution obtained in step , adjust the pH value to 5.0 with 2mol / L sodium hydroxide solution, stir for 30min; transfer the mixture to 50mL polytetrafluoroethylene In a lined stainless steel hydrothermal kettle, control the volume of the solution to 40mL, and then perform hydrothermal treatment at a temperature of 160°C for 24 hours at a constant temperature;

[0028] After step , the solid product was separated by vacuum filtration, and the obtained solid product was washed with deionized water and absolute ethanol until neutral, and then dried at 80°C for 10 hours to obtain light yellow Bi 4 o 5 Br 2 solid powder.

Embodiment 2

[0030] Weigh 2.4 grams of bismuth nitrate pentahydrate and dissolve it in 1.5 mL of concentrated nitric acid, add a small amount of water to dilute to 10 mL, and stir evenly;

[0031] Weigh 0.75 g of cetyltrimethylammonium bromide and dissolve it in 10 mL of deionized water, and stir evenly;

[0032] Slowly add the solution obtained in step to the solution obtained in step , adjust the pH value to 5.0 with 2mol / L sodium hydroxide solution, stir for 30min; transfer the mixture to 50mL polytetrafluoroethylene In a lined stainless steel hydrothermal kettle, control the volume of the solution to 40mL, and then perform hydrothermal treatment at a temperature of 160°C for 24 hours at a constant temperature;

[0033] After step , the solid product was separated by vacuum filtration, and the obtained solid product was washed with deionized water and absolute ethanol until neutral, and then dried at 80°C for 24 hours to obtain light yellow Bi 4 o 5 Br 2 solid powder.

Embodiment 3

[0035] Weigh 1.5 grams of bismuth nitrate pentahydrate and dissolve it in 1.0 mL of concentrated nitric acid, add a small amount of water to dilute to 10 mL, and stir evenly;

[0036] Weigh 1.0 g of cetyltrimethylammonium bromide, dissolve it in 15 mL of deionized water, and stir evenly;

[0037] Slowly add the solution obtained in step to the solution obtained in step , adjust the pH value to 6.0 with 2mol / L sodium hydroxide solution, stir for 40min; transfer the mixture to 50mL polytetrafluoroethylene In a lined stainless steel hydrothermal kettle, control the volume of the solution to 40mL, and then perform hydrothermal treatment at a temperature of 160°C for 28 hours at a constant temperature;

[0038] After step , the solid product was separated by vacuum filtration, the obtained solid product was washed with deionized water and absolute ethanol to neutrality, and then dried at 60°C for 12 hours to obtain light yellow Bi 4 o 5 Br 2 solid powder.

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Abstract

The invention discloses a visible-light-induced photocatalyst Bi4O5Br2 and a preparation method thereof. According to the visible-light-induced photocatalyst Bi4O5Br2 and the preparation method thereof, an improved low-temperature hydrothermal method is adopted, composition of Bi, O and Br in BiOX is controlled by controlling amount of a bismuth source and a bromine source, and a novel layered-cake-shaped visible-light-induced photocatalyst Bi4O5Br2 is prepared successfully. The preparation method is simple in production process, easy to operate, low in synthesis temperature, high in reaction yield, environment-friendly and low in cost and meets the requirement of actual production, the reaction yield is 92%, and raw materials are easy to obtain. The visible-light-induced photocatalyst has good visible-light catalytic activity, can completely degrade various organic pollutants such as rhodamine b, methyl orange and methylene blue in short time under the visible light irradiation, is small in light corrosion and good in reusability, can be applied to industrial production and particularly has a better application value in organic pollutant degradation through solar photocatalysis, and the market potential is large.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis and material chemistry, in particular to a visible light catalyst Bi 4 o 5 Br 2 and its preparation method. Background technique [0002] Due to its potential applications in solar energy conversion and environmental purification, semiconductor photocatalysis has become one of the academic research hotspots in the past two decades. Among various photocatalytic materials, nano-TiO 2 It has received the most attention and research due to its strong oxidizing ability, low price, non-toxicity, biological and chemical inertness, and long-term light and thermal stability. However, due to TiO 2 It is a wide-bandgap semiconductor and can only respond to ultraviolet light irradiation of λ<380nm, which severely limits its practical application in sunlight or indoor lighting environments, because these light sources mainly radiate visible light. Therefore, finding, designing and synthesizing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/08B01J35/02C02F1/30C02F101/38
CPCY02W10/37
Inventor 陈渊梁春杰罗志辉杨家添蔡伊伦
Owner YULIN NORMAL UNIVERSITY
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