Preparation method of macroporous large specific surface magnetic photocatalyst Fe3O4/TiO2

A high specific surface, visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve difficulties and other problems, and achieve the effect of simple method, rapid solid-liquid separation, and easy operation.

Active Publication Date: 2013-11-06
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the magnetic load TiO 2 It is still difficult to promote visible light catalysts from the laboratory to industrial production and to achieve large-scale applications in related fields

Method used

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  • Preparation method of macroporous large specific surface magnetic photocatalyst Fe3O4/TiO2
  • Preparation method of macroporous large specific surface magnetic photocatalyst Fe3O4/TiO2
  • Preparation method of macroporous large specific surface magnetic photocatalyst Fe3O4/TiO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0025] Fe(NO 3 ) 2 ·6H 2 O and Fe 2 (SO 4 ) 3 9H 2 O is dissolved in 50mL distilled water according to the iron ion molar ratio of 1:2, and is prepared into an aqueous solution with a total iron ion molar fraction of 1.8%, and is added to the 2In the four-necked bottle with the device and thermometer, start stirring and add 10 parts of macroporous cross-linked polystyrene microspheres to it, the system is heated up to 45°C, and the temperature is maintained for 4h, then poured out, filtered and collected. Add polystyrene microspheres into a 100mL Erlenmeyer flask with a stopper, and put the flask into a constant temperature water bath. When the temperature rises to 80°C, add 5 parts of sodium hydroxide to it, shake gently for 1min and then keep the temperature After reacting for 50min and cooling to room temperature, Fe was obtained by magnetic separation 3 o 4 / polystyrene microspheres, put them into a muffle furnace, calcinate at 600°C for 5h in a nitrogen atmosphere...

Embodiment 4

[0029] FeCl 2 4H 2 O and Fe(NO 3 ) 3 9H 2 O is dissolved in 50mL distilled water according to the iron ion molar ratio of 1:2, and is prepared into an aqueous solution with a total iron ion molar fraction of 1.9%, and is added to the 2 In the four-necked bottle of the device and thermometer, start stirring and add 8 parts of macroporous cross-linked polydivinylbenzene microspheres to it, the system is heated up to 55°C, and the temperature is maintained for 3h, then poured out, filtered and collected. Pore ​​cross-linked polydivinylbenzene microspheres were added to a 100mL Erlenmeyer flask with a stopper, and the flask was placed in a constant temperature water bath. When the temperature rose to 65°C, 4 parts of sodium hydroxide was added to it, and gently Shake for 1 min, then react at constant temperature for 1 h, cool to room temperature, and obtain Fe by magnetic separation 3 o 4 / polydivinylbenzene microspheres, put them into a muffle furnace, calcinate at 800°C fo...

Embodiment 5

[0031] FeSO 4 ·7H 2 O and FeCl 3 ·6H 2 O is dissolved in 50mL distilled water according to the iron ion molar ratio of 1:2, and is prepared into an aqueous solution with a total iron ion molar fraction of 3%, and is added to the 2 In the four-necked bottle with the device and thermometer, start stirring and add 7 parts of macroporous cross-linked polyacrylonitrile microspheres to it, the system is heated up to 45°C, keep this temperature for 5h, pour out, filter and collect the impregnated macroporous cross-linked polyacrylonitrile microspheres. Add polyacrylonitrile microspheres into a 100mL Erlenmeyer flask with a stopper, and put the flask into a constant temperature water bath. When the temperature rises to 70°C, add 5 parts of sodium hydroxide to it, shake gently for 1min and then keep the temperature After reacting for 45min and cooling to room temperature, Fe was obtained by magnetic separation 3 o 4 / polyacrylonitrile microspheres, put them into a muffle furnace, ...

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Abstract

The invention relates to a preparation method of macroporous large specific surface magnetic photocatalyst Fe3O4 / TiO2 characterized by taking macroporous crosslinked polymer microsphere as template, by dipping of Fe3+ and Fe2+ and coprecipitation of ferric ions inside pores under the effect of OH- to generate Fe3O4 / polymer sphere, burning Fe3O4 / polymer sphere under N2 atmosphere to remove the polymer template to obtain macroporous Fe3O4 sphere, introducing Ti source into the Fe3O4 sphere by dipping method, and burning to obtain macroporous large specific surface Fe3O4 / TiO2 sphere. The invention as magnetic loaded photocatalyst is featured by rapid solid and liquid separating speed and large catalytic contact area, thereby having high application value. The advantages of the method are that the technique and the operation can be industrialized and popularized easily. The Fe3O4 / TiO2 sphere has large specific surface area and quick magnetic response.

Description

technical field [0001] The invention relates to a macroporous high specific surface magnetic visible light catalyst Fe 3 o 4 / TiO 2 The preparation method specifically involves macroporous cross-linked polymer microspheres as a template, through Fe 3+ and Fe 2+ Immersion, OH - Co-precipitation of iron ions in the pores under the action of two-step preparation of Fe 3 o 4 / polymer microspheres, the Fe 3 o 4 / polymer microspheres in N 2 Ignition removal of polymer template under atmosphere to obtain macroporous Fe 3 o 4 Microspheres, and then through the method of impregnation to Fe 3 o 4 The Ti source is introduced into the microspheres, and the large pores and high specific surface Fe can be obtained after burning. 3 o 4 / TiO 2 Microspheres. Background technique [0002] As an energy-saving, high-efficiency, and thoroughly degraded sewage treatment method, photocatalytic oxidation has attracted much attention from researchers. The photocatalyst currently us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745B01J35/10C02F1/30
Inventor 张秋禹张宝亮张和鹏李伟范新龙厉向杰雷星锋
Owner NORTHWESTERN POLYTECHNICAL UNIV
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