Preparation of TiO2/ZnFe2O4 magnetic composite photocatalyst

A technology of znfe2o4 and composite light, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., and can solve problems such as increased cost, complex synthesis process, and environmental hazards of organic matter , to achieve the effects of simplified production process, good dispersion, low reaction temperature and energy consumption

Inactive Publication Date: 2008-09-17
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This complicates the synthesis process to a certain extent, increases the cost, and the addition of organic matter also causes certain harm to the environment

Method used

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  • Preparation of TiO2/ZnFe2O4 magnetic composite photocatalyst
  • Preparation of TiO2/ZnFe2O4 magnetic composite photocatalyst
  • Preparation of TiO2/ZnFe2O4 magnetic composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Add zinc acetate and ferric nitrate at a molar ratio of 1:2 into an aqueous NaOH solution with a pH of 10, stir well to dissolve them, and react at 180°C for 24 hours to obtain ZnFe 2 o 4 precipitation.

[0021] (2) ZnFe obtained in step 1 2 o 4 Precipitate 2.41 g dispersed in 200 ml of V 水 :V 乙醇 =1:8 ethanol aqueous solution, ultrasonic for 30 minutes and then stirred for 2 hours, the pH of the solution was adjusted to 5 with glacial acetic acid to obtain solution A.

[0022] (3) Add 3.4 ml of tetrabutyl titanate into 20 ml of ethanol, and stir for 30 minutes to obtain solution B.

[0023] (4) All the solution B obtained in step 3 was dropped into the solution A obtained in step 2 dropwise, and after stirring for 10 hours, the red precipitate C was obtained by centrifugal separation and deionized water washing.

[0024] (5) Calcining the red precipitate C obtained in step 4 at 800° C. for 4 hours to obtain the desired product. The powder X-ray diffraction pa...

Embodiment 2

[0026] (1) Add zinc acetate and ferric nitrate at a molar ratio of 1:2 into an aqueous NaOH solution with a pH of 10, stir well to dissolve them, and react at 180°C for 24 hours to obtain ZnFe 2 o 4 precipitation.

[0027] (2) ZnFe obtained in step 1 2 o 4 Precipitate 2.41 g dispersed in 200 ml of V 水 :V 乙醇 =1:8 ethanol aqueous solution, ultrasonic for 30 minutes and then stirred for 2 hours, the pH of the solution was adjusted to 5 with glacial acetic acid to obtain solution A.

[0028] (3) Add 6.8 ml of tetrabutyl titanate into 20 ml of ethanol, and stir for 30 minutes to obtain solution B.

[0029] (4) All the solution B obtained in step 3 was dropped into the solution A obtained in step 2 dropwise, and after stirring for 10 hours, the red precipitate C was obtained by centrifugal separation and deionized water washing.

[0030] (5) Calcining the red precipitate C obtained in step 4 at 800° C. for 4 hours to obtain the desired product.

[0031] Such as figure 1 , ...

Embodiment 3

[0033](1) Add zinc acetate and ferric nitrate at a molar ratio of 1:2 into an aqueous NaOH solution with a pH of 10, stir well to dissolve them, and react at 180°C for 24 hours to obtain ZnFe 2 o 4 precipitation.

[0034] (2) ZnFe obtained in step 1 2 o 4 Precipitate 2.41 g dispersed in 200 ml of V 水 :V 乙醇 =1:8 ethanol aqueous solution, ultrasonic for 30 minutes and then stirred for 2 hours, the pH of the solution was adjusted to 5 with glacial acetic acid to obtain solution A.

[0035] (3) Add 12.6 ml of tetrabutyl titanate into 20 ml of ethanol, and stir for 30 minutes to obtain solution B.

[0036] (4) All the solution B obtained in step 3 was dropped into the solution A obtained in step 2 dropwise, and after stirring for 10 hours, the red precipitate C was obtained by centrifugal separation and deionized water washing.

[0037] (5) Calcining the red precipitate C obtained in step 4 at 800° C. for 4 hours to obtain the desired product.

[0038] Such as figure 1 , 4...

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Abstract

The invention relates to a preparation method for TiO2 / ZnFe2O4 magnetic complex photocatalysis, belonging to the technical field of nanometer photocatalysis material preparation, which adopts magnetic material ZnFe2O4 as carrier, requiring no organic compounds or middle-tier; the magnetic material ZnFe2O4 is assembled into magnetic photocatalysis of complexs nanometer grain through the method of sol-gel. The preparation method has the advantages of not only ability to preserve perfect suspension property, and high photocatalysis activity, but also ability to conveniently and rapidly recover magnetic photocatalysis utilizing magnetism separation technology, to reach the purpose of repeated recycle and utilization.

Description

technical field [0001] TiO 2 / ZnFe 2 o 4 A preparation method of a magnetic composite photocatalyst belongs to the technical field of preparation of nanometer photocatalyst materials. Background technique [0002] Since Fujishima and Honda in Japan discovered TiO in 1970 2 Since single crystal electrodes can photocatalytically split water to produce hydrogen, semiconductor photocatalysis technology has aroused great interest and widespread attention. Due to the increasingly serious environmental crisis brought about by global industrialization, the survival and development of human society are facing a huge threat. Environmental protection and sustainable development have become the primary issues that human society must consider. This makes the green and environmentally friendly photocatalytic degradation of organic pollutants Technology has become a research hotspot for environmental researchers. [0003] TiO 2 Non-toxic, stable performance, chemical and photocorrosi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J21/06
Inventor 汪浩吴晓李坤威严辉朱满康侯育冬王如志王波宋雪梅张铭
Owner BEIJING UNIV OF TECH
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