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Novel magneto-optical dual-functional catalyst with Fe3O4/BiOI core/shell structure

A technology of shell structure and photocatalytic particles, applied in the field of magnetic nano-photocatalyst, can solve the problem of difficult recovery of nano-catalyst, and achieve the effect of good catalytic stability and high photocatalytic performance

Inactive Publication Date: 2016-06-15
HEBEI UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In summary, the research on the preparation of new stable magnetic / optical dual-functional catalysts can solve the problem that the current nanocatalysts are difficult to recycle, and is of great significance to the development of environmentally friendly photocatalytic technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The magnetic nano photocatalytic particle Fe of the core / shell structure is prepared by the microwave chemical synthesis method of the present invention 3 o 4 / BiOI, first, 589mg (1mmol) BiI 3 Join in 100ml ethylene glycol, fully stir on the magnetic stirrer to obtain clear solution, the 232mgFe prepared above 3 o 4 The powder is evenly dispersed in the above clear solution, ultrasonicated for 20 minutes, placed in a microwave synthesizer, stirred magnetically, and subjected to microwave chemical synthesis for 5 minutes. The product is magnetically separated and washed three times with deionized water and ethanol, and dried in a blast drying oven at 60°C. Dry, obtain the core-shell structure of Fe 3 o 4 / BiOI magnetic nanoparticles.

[0021] Under the above-mentioned preparation process conditions, the prepared core / shell structure Fe 3 o 4 The saturation magnetization of / BiOI nanoparticles is 61.5emu / g. The methyl orange degradation rate of the catalyst reache...

Embodiment 2

[0023] The magnetic nano photocatalytic particle Fe of the core / shell structure is prepared by the microwave chemical synthesis method of the present invention 3 o 4 / BiOI, first, 589mg (1mmol) BiI 3 Join in 100ml ethylene glycol, fully stir on the magnetic stirrer to obtain clear solution, the 232mgFe prepared above 3 o 4 The powder is uniformly dispersed in the above clear solution, ultrasonicated for 20 minutes, placed in a microwave synthesizer, stirred magnetically, and subjected to microwave chemical synthesis reaction for 10 minutes, the product is magnetically separated and washed three times with deionized water and ethanol, and dried in a blast drying oven at 60°C Dry, obtain the core-shell structure of Fe 3 o 4 / BiOI magnetic nanoparticles.

[0024] Under the above-mentioned preparation process conditions, the saturation magnetization of the prepared nanoparticles is 62emu / g. The methyl orange degradation rate of the catalyst reached 95.7%.

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Abstract

The invention belongs to the field of preparation of a magnetic nano photocatalyst, and in particular relates to magnetic nano photocatalytic particles with a core / shell structure and a preparation method thereof. The nano particles are Fe3O4 / BiOI prepared by performing microwave chemical synthesis on nano Fe3O4 and BiI3 which serve as raw materials and ethylene glycol serving as a solvent and a surfactant. The Fe3O4 / BiOI nano particles with the core / shell structure are higher in photocatalysis performance. The magnetic nano photocatalyst can be used for catalytically degrading azo-group dyes, has paramagnetism and catalysis stability, and can be recycled for multiple times.

Description

technical field [0001] The invention belongs to the field of magnetic nano photocatalysts, in particular to magnetic nano photocatalytic particles with a core / shell structure and a preparation method thereof. Background technique [0002] Semiconductor photocatalysis technology can be carried out at normal temperature and pressure, and has almost no selectivity for pollution degradation, and can degrade pollutants into non-toxic small inorganic molecules. However, the low recycling rate is a major factor restricting its industrialization. Fe 3 o 4 It is a magnetic carrier with good paramagnetism, stable properties, no adverse effect on the activity of the photocatalytic part, non-toxic, harmless, non-polluting, easy-to-obtain raw materials, and simple preparation process. BiOI has a layered structure, and there is a built-in electric field inside the crystal, which can effectively improve the separation efficiency of photogenerated electron-hole pairs. Fe after combining ...

Claims

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Application Information

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IPC IPC(8): B01J27/128B01J37/34C02F1/30C02F101/38C02F103/30
CPCC02F1/30B01J27/128B01J37/343C02F2305/10C02F2101/38C02F2101/308B01J35/33B01J35/39
Inventor 郑立允王书岭赵立新刘晓艳梁顺星
Owner HEBEI UNIV OF ENG
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