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Magnetic ZnO/Fe3O4 catalyst as well as preparation method and application thereof

A composite catalyst and reaction technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low pollutant removal efficiency and long reaction time, etc. To achieve the effect of simple preparation method, short synthesis process cycle and cheap raw materials

Inactive Publication Date: 2015-04-29
RENMIN UNIVERSITY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the magnetic oxide Fe 3 o 4 It has been reported to combine with iron, copper, and aluminum among the four common transition metals to form composite catalysts, but there are problems such as low pollutant removal efficiency and long reaction time.
Elemental zinc usually has the characteristics of small particle size and high catalytic activity, but there is no research on Fe 3 o 4 Preparation and report of complex catalysts with zinc

Method used

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  • Magnetic ZnO/Fe3O4 catalyst as well as preparation method and application thereof
  • Magnetic ZnO/Fe3O4 catalyst as well as preparation method and application thereof
  • Magnetic ZnO/Fe3O4 catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] 1) Preparation of Fe 3 o 4 :

[0054] Weigh 0.0172molFeCl 3 ·6H 2 O, 0.0086mol FeSO 4 ·7H 2 O was dissolved in 400mL ultrapure water, and N 2 Then stir well.

[0055] Slowly add 0.1mol NH to the above solution dropwise 3 ·H 2 O, continue stirring for 30min to obtain a black precipitate, which is washed to neutrality with ultrapure water and separated with a magnet to obtain magnetic Fe 3 o 4 .

[0056] 2) Preparation of Zn 0 / Fe 3 o 4 Composite catalyst:

[0057] With the freshly prepared Fe obtained in step 1) 3 o 4 (0.026mol) dispersed in 200mL ultrapure water, add 0.052mol ZnSO 4 , into N 2 Then stir well. Add 400mL 0.269mol / L NaBH dropwise to the above solution 4 After fully performing the reduction reaction at 20°C for 30 minutes, the obtained reaction system was centrifuged, and the obtained precipitate was washed with water until the pH value was neutral, and then dried at 50°C for 24 hours to obtain the Zn 0 / Fe 3 o 4 Composite catalyst. ...

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Abstract

The invention discloses a magnetic ZnO / Fe3O4 composite catalyst as well as a preparation method and application thereof. The preparation method of the composite catalyst comprises the following steps: under an inert atmosphere, dissolving iron oxide and zinc salt according to the ratio in a solvent, mixing an aqueous solution of sodium borohydride and carrying out reduction reaction and after the reaction is completed, drying the obtained precipitate to obtain the composite catalyst. The deficiencies of the prior art are overcome, the invention provides the magnetic ZnO / Fe3O4 catalyst which has the advantages of simple preparation, cheap raw materials and high catalytic activity and the preparation method thereof. By the catalyst, the removal rate of crystal violet in the Fenton reaction can be obviously increased.

Description

technical field [0001] The invention belongs to the field of catalysts and relates to magnetic Zn 0 / Fe 3 o 4 Catalyst and its preparation method and application. Background technique [0002] With the widespread use of synthetic dyes in the industrial field, dye wastewater is showing a continuous increase trend. Industrial dye wastewater has the characteristics of high chroma, high toxicity, and refractory degradation. For refractory dyes in wastewater, conventional water treatment technologies are difficult to achieve effective treatment effects. In recent years, advanced oxidation technology has gradually become an effective technology for treating such wastewater. The main role in the advanced oxidation process is the strong oxidizing OH. Among them, in the Fenton system, H 2 o 2 As a strong oxidizing agent, it is widely used to generate OH, but due to the presence of H 2 o 2 Low utilization rate, homogeneous catalyst Fe 2+ It is easy to form iron sludge, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80C02F1/72
Inventor 张光明田慧芳彭猛种珊杨光任慕华张楠刘毓璨
Owner RENMIN UNIVERSITY OF CHINA
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