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Magnetically supported silver bromide photochemical catalysis material and preparation method thereof

A photocatalytic material, silver bromide technology, applied in the field of photocatalysis, can solve problems such as difficult to recycle and reuse

Inactive Publication Date: 2012-09-19
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to make the silver bromide photocatalyst truly practical, it is necessary to solve the problem that it is difficult to recycle.

Method used

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  • Magnetically supported silver bromide photochemical catalysis material and preparation method thereof
  • Magnetically supported silver bromide photochemical catalysis material and preparation method thereof
  • Magnetically supported silver bromide photochemical catalysis material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Dissolve ferric chloride in ethylene glycol, add anhydrous sodium acetate and 24g / L polyethylene glycol, stir the mixture vigorously for 30 minutes, and then carry out hydrothermal reaction. After the reaction, wash three times with absolute ethanol and secondary water respectively, and disperse in absolute ethanol; take the above-mentioned ethanol solution, add absolute ethanol, secondary water, ultrasonically disperse, and slowly add dropwise ethyl orthosilicate ( The molar ratio of ethyl orthosilicate to ferric oxide is 1:1), quickly add ammonia water dropwise, and keep ultrasonic reaction at room temperature. After the end, wash with absolute ethanol and secondary water several times, magnetically separate, and disperse in water; under ultrasonic and mechanical stirring conditions, take the above-mentioned product, add silver nitrate and ammonia water quickly, and slowly add potassium bromide (bromide) The molar ratio of potassium to ferric oxide is 1:1) aqueous sol...

Embodiment 2

[0025] Dissolve ferric chloride in ethylene glycol, add anhydrous sodium acetate and 12g / L polyethylene glycol, stir the mixture vigorously for 30 minutes, and then carry out hydrothermal reaction. After the reaction, wash three times with absolute ethanol and secondary water respectively, and disperse in absolute ethanol; take the above-mentioned ethanol solution, add absolute ethanol, secondary water, ultrasonically disperse, and slowly add dropwise ethyl orthosilicate ( The molar ratio of ethyl orthosilicate to ferric oxide is 1:1), quickly add ammonia water dropwise, and keep ultrasonic reaction at room temperature. After the end, wash with absolute ethanol and secondary water several times, magnetically separate, and disperse in water; under ultrasonic and mechanical stirring conditions, take the above-mentioned product, add silver nitrate and ammonia water quickly, and slowly add potassium bromide (bromide) The molar ratio of potassium to ferric oxide is 1:1) aqueous sol...

Embodiment 3

[0027] Dissolve ferric chloride in ethylene glycol, add anhydrous sodium acetate and 24g / L polyethylene glycol, stir the mixture vigorously for 30 minutes, and then carry out hydrothermal reaction. After the reaction, wash three times with absolute ethanol and secondary water respectively, and disperse in absolute ethanol; take the above-mentioned ethanol solution, add absolute ethanol, secondary water, ultrasonically disperse, and slowly add dropwise ethyl orthosilicate ( The molar ratio of ethyl orthosilicate to ferroferric oxide is 1.2:1), quickly add ammonia water dropwise, and keep ultrasonic reaction at room temperature. After the end, wash with absolute ethanol and secondary water several times, magnetically separate, and disperse in water; under ultrasonic and mechanical stirring conditions, take the above-mentioned product, add silver nitrate and ammonia water quickly, and slowly add potassium bromide (bromide) The molar ratio of potassium to ferric oxide is 1:1) aque...

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Abstract

The invention relates to a magnetically supported silver bromide photochemical catalysis material and a preparation method thereof. The photochemical catalysis material is composed of a ferroferric oxide / silicon dioxide nuclear shell structure and a silver bromide supported by an outer layer of the ferroferric oxide / silicon dioxide nuclear shell structure. The preparation method comprises the steps: (1) using perchloride iron as a precursor, using polyethylene glycol as a dispersing agent, using a ethylene glycol as a high-boiling-point solvent and utilizing a hydrothermal method to prepare monodisperse magnetic ferroferric oxide nanometer particles; (2) cladding silicon dioxide to form the ferroferric oxide / silicon dioxide nuclear shell structure; and (3) using silver nitrate as a silver source, using potassium bromide or other bromides as a bromine source, supporting silver bromide on the ferroferric oxide / silicon dioxide surface, and using ultraviolet light to perform photo-reduction to silver bromide microcrystal to enable the surface to form silver nanometer particles in a in-situ mode. Compared with existing methods, the magnetically supported silver bromide photochemical catalysis material and the preparation method have the advantages that a catalyst is controllable in morphology and can be recycled in a magnetic control mode and the like. The catalyst prepared by means of the method can efficiently degrade organic pollutants including dyestuffs and the like.

Description

technical field [0001] The invention relates to a photocatalytic material applicable to degradation of pollutants in water and hydrogen production by photolysis of water and a preparation method thereof, belonging to the technical field of photocatalysis. Background technique [0002] Due to the development of industry and human social economy, human beings are paying more and more attention to energy and the environment, making more and more people devote themselves to the research of the utilization rate of solar energy. Artificial photosynthesis systems are popular due to abundant solar energy resources and less carbon footprint, such as photolysis of water to produce hydrogen, photocatalysis, photovoltaic cells. [0003] Since titanium dioxide showed the conversion ability between photoelectrochemistry and solar energy in 1969, this semiconductor material immediately attracted widespread attention from the academic community. Nano-titanium dioxide can use sunlight to co...

Claims

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Application Information

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IPC IPC(8): B01J23/89
Inventor 田宝柱王婷婷李艺茹张金龙董荣芳李套云熊天庆陈星杨钒
Owner EAST CHINA UNIV OF SCI & TECH
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