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A kind of preparation method of visible light degradation organic dye composite catalyst

A technology of composite catalysts and organic dyes, applied in the field of photocatalysis, can solve the problems of reducing degradation and other problems, and achieve the effects of high yield, simple production process and effective utilization

Active Publication Date: 2020-05-01
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Nano-semiconductor materials have good photosensitive properties and are the first choice for photocatalysis. However, the bandgap width of some semiconductors limits the efficiency of light utilization. For those with too large bandgap, ultraviolet light induction is often required, and ultraviolet light in sunlight The proportion is less, this factor greatly reduces its application in visible light degradation

Method used

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  • A kind of preparation method of visible light degradation organic dye composite catalyst
  • A kind of preparation method of visible light degradation organic dye composite catalyst
  • A kind of preparation method of visible light degradation organic dye composite catalyst

Examples

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Embodiment 1

[0030] A Composite Catalyst Bi for Visible Light Degradation of Rhodamine Organic Dyes 2 Fe 4 o 9 The preparation method of / BiOCl, comprises the following steps:

[0031] (1) Weigh 5mmol of bismuth nitrate pentahydrate (2.43g) in 20mL NaOH (10mol / L) aqueous solution, stir and mix well, then add 5mmol of ferric nitrate nonahydrate (2.02g), continue stirring for half an hour, transfer to In the reaction kettle, conduct a hydrothermal reaction at 200°C for 8 hours. After the reaction, cool to room temperature, filter, and wash the obtained filter residue with absolute ethanol and deionized water for several times, then vacuum-dry (dry at 80°C for 6 hours) to obtain the intermediate product A 1.87 g.

[0032] (2) Weigh each 2mmol of bismuth nitrate pentahydrate (0.97g) and potassium chloride (0.15g) into 20mL of deionized water, then add 0.026g of intermediate product A to it, stir for 20 minutes, and transfer to the reaction In the still, under the hydrothermal condition of 1...

Embodiment 2

[0034] A Composite Catalyst Bi for Visible Light Degradation of Rhodamine Organic Dyes 2 Fe 4 o 9 The preparation method of / BiOCl, comprises the following steps:

[0035] (1) Weigh 5mmol of bismuth nitrate pentahydrate (2.43g) in 20mL NaOH (10mol / L) aqueous solution, stir and mix well, then add 5mmol of ferric nitrate nonahydrate (2.02g), continue stirring for half an hour, transfer to In the reaction kettle, conduct a hydrothermal reaction at 200°C for 8 hours. After the reaction, cool to room temperature, filter, and wash the obtained filter residue with absolute ethanol and deionized water for several times, then vacuum-dry (dry at 80°C for 6 hours) to obtain the intermediate product A 1.89g.

[0036] (2) Weigh each 2mmol of bismuth nitrate pentahydrate (0.97g) and potassium chloride (0.15g) into 20mL of deionized water, then add 0.052g of intermediate product A to it, stir for 20 minutes, and transfer to the reaction In the still, under the hydrothermal condition of 14...

Embodiment 3

[0038] A Composite Catalyst Bi for Visible Light Degradation of Rhodamine Organic Dyes 2 Fe 4 o 9 The preparation method of / BiOCl, comprises the following steps:

[0039](1) Weigh 5mmol of bismuth nitrate pentahydrate (2.43g) in 20mL NaOH (10mol / L) aqueous solution, stir and mix well, then add 5mmol of ferric nitrate nonahydrate (2.02g), continue stirring for half an hour, transfer to In the reaction kettle, conduct a hydrothermal reaction at 200°C for 8 hours. After the reaction, cool to room temperature, filter, and wash the obtained filter residue with absolute ethanol and deionized water for several times, then vacuum-dry (dry at 80°C for 6 hours) to obtain the intermediate product A 1.83 g.

[0040] (2) Weigh each 2mmol of bismuth nitrate pentahydrate (0.97g) and potassium chloride (0.15g) into 20mL of deionized water, then add 0.078g of intermediate product A to it, stir for 20 minutes, and transfer to the reaction In the still, under the hydrothermal condition of 14...

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Abstract

The invention belongs to the technical field of photocatalysis, and specifically, the invention relates to a preparation method of a composite catalyst Bi2Fe4O9 / BiOCl for visible light degradation of organic dyes, the preparation method comprises the following steps: (1) weighing bismuth nitrate, adding the bismuth nitrate into a sodium hydroxide aqueous solution, uniformly dispersing, adding ferric nitrate, continuously dispersing uniformly, transferring the mixture into a reaction kettle, carrying out hydrothermal reaction, cooling, carrying out solid-liquid separation, washing the obtained solid-state separated matter, and carrying out vacuum drying to obtain an intermediate product a; (2) weighing bismuth nitrate and potassium chloride in water, then adding the intermediate product ainto the water, uniformly dispersing, and transferring the mixture into the reaction kettle, carrying out hydrothermal reaction, after the reaction is completed, cooling, carrying out solid-liquid separation, washing the obtained solid-state separated matter, and carrying out vacuum drying to obtain the composite catalyst. The production raw materials are cheap and easily available, the production process is simple, the yield is high, the composite catalyst is good in stability after material compounding, has acid and alkali resistance and fast organic dye degradation efficiency, and can effectively degrade the organic dyes by utilizing the visible light.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular, it is a composite catalyst for visible light degradation of organic dyes Bi 2 Fe 4 o 9 / The preparation method of BiOCl. Background technique [0002] With the improvement of living standards and the development of economy and technology, environmental pollution has gradually become one of the problems that people are most concerned about and need to deal with urgently. Organic pollutants account for a large proportion of environmental pollution, and most of them have certain toxicity, and some are "three-causing" substances (mutagenic, teratogenic and carcinogenic), so how to effectively deal with organic pollutants has become a The focus of everyone's research. At present, the methods for treating organic pollutants include physical adsorption, biodegradation, chemical oxidation and photocatalysis. [0003] Compared with other traditional degradation technologies, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/06C02F1/30C02F101/30
Inventor 倪春林牛志成周家容薛敏萧泳欣高航刘彩虹
Owner SOUTH CHINA AGRI UNIV