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magnetic zn 0 /fe 3 o 4 Catalyst and its preparation method and application

A composite catalyst and reaction technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problems of low pollutant removal efficiency and long reaction time, etc. Achieve the effects of simple preparation method, short synthesis process cycle, good stability and activity

Inactive Publication Date: 2017-06-23
RENMIN UNIVERSITY OF CHINA
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  • 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 zn <sup>0</sup> /fe <sub>3</sub> o <sub>4</sub> Catalyst and its preparation method and application
  • magnetic zn <sup>0</sup> /fe <sub>3</sub> o <sub>4</sub> Catalyst and its preparation method and application
  • magnetic zn <sup>0</sup> /fe <sub>3</sub> o <sub>4</sub> Catalyst and its preparation method and application

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Experimental program
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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 0.052molZnSO 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 composite catalyst Zn 0 / Fe 3 o 4 And its preparation method and application. The method for preparing the composite catalyst comprises: in an inert atmosphere, mixing ferric iron tetroxide and zinc salt in a solvent according to the stated ratio with an aqueous solution of sodium borohydride to carry out a reduction reaction, and drying the obtained precipitate after the reaction is completed to obtain the obtained the composite catalyst. The invention overcomes the deficiencies in the prior art and provides a magnetic composite catalyst Zn with simple preparation, cheap raw materials and high catalytic activity. 0 / Fe 3 o 4 And the preparation method, the catalyst can significantly improve the removal efficiency of crystal violet in the Fenton-like reaction.

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 Patents(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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