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Fenton catalyst as well as preparation method and application thereof

A catalyst, Fenton's technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as the gap in catalytic efficiency, achieve short reaction time, simple raw materials, and easy large-scale industrial production Effect

Active Publication Date: 2017-12-29
昆山中环科本科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, although the heterogeneous Fenton catalyst of the above invention has expanded the pH applicability of the Fenton catalytic reaction to a certain extent, its catalytic efficiency under neutral conditions still has a large gap with it under acidic conditions.

Method used

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  • Fenton catalyst as well as preparation method and application thereof
  • Fenton catalyst as well as preparation method and application thereof
  • Fenton catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The precursor FeCl 3 ·6H 2 O is ground into powder, stored after drying, then the precursor powder is placed in a crucible and sealed, the volume ratio of the precursor powder to the crucible is about 0.2, and the crucible that is sealed with the ferric chloride powder precursor is placed in an oven to Raise the temperature to 140°C at a heating rate of 1°C / min, and keep it for 2 hours. After cooling down to room temperature, take out the sealed crucible, take out the deep maroon solid formed by sintering at the bottom, grind it into powder, and wash it with acetone centrifugally for 3 times before drying Dry, store dry. The scanning electron microscope picture of the ferric oxychloride catalyst synthesized in this embodiment is shown in figure 1 .

Embodiment 2

[0036] The precursor FeCl 3 ·6H 2 O is ground into powder, preserved after drying, then the precursor powder is placed in the crucible and sealed, the volume ratio of the precursor powder to the crucible is about 0.14, the crucible that is sealed with the ferric chloride powder precursor is placed in the oven, with Raise the temperature to 200°C at a heating rate of 5°C / min, and keep it for 1 hour. After cooling down to room temperature, take out the sealed crucible, take out the dark brown-red solid formed by sintering at the bottom and grind it into powder, and wash it with acetone centrifuge for 3 times before drying Dry, store dry. The scanning electron microscope picture of the ferric oxychloride catalyst synthesized in this embodiment is shown in figure 2 , elemental composition analysis map see image 3 . Use the supporting X-ray energy spectrometer in the scanning electron microscope to directly conduct qualitative and quantitative analysis on the element distribu...

Embodiment 3

[0045] The precursor FeCl 3 ·6H 2O is ground into powder, stored after drying, then the precursor powder is placed in a crucible and sealed, the volume ratio of the precursor powder to the crucible is about 0.1, and the crucible that is sealed with the ferric chloride powder precursor is placed in an oven to Raise the temperature to 220°C at a heating rate of 10°C / min and keep it for 0.5h. After cooling down to room temperature, take out the sealed crucible, take out the dark brown-red solid formed by sintering at the bottom and grind it into powder, and wash it with acetone centrifuge for 3 times. Tumble dry and store dry. The scanning electron microscope picture of the ferric oxychloride catalyst synthesized in this embodiment is shown in Figure 4 , X-ray diffraction pattern see Figure 5 , X-ray photoelectron spectroscopy diagram see Figure 6 .

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Abstract

The invention discloses a preparation method of a Fenton catalyst. The preparation method comprises the following steps of a, grinding a precursor (FeCl3.6H2O) into powder; b, adding the precursor powder (FeCl3.6H2O) into a crucible, and sealing; c, placing the sealed crucible loaded with the precursor powder (ferric chloride) into an oven, and calcining; d, naturally cooling the calcined crucible in step c to normal temperature, fetching out the solid which is sintered at the bottom part of the crucible, grinding into powder, cleaning, and drying. The preparation method of the Fenton catalyst has the advantages that the reaction time is short, the conditions are moderate, the amount of raw materials is small, and the large-scale industrialization is easily realized; the prepared catalyst has strong suitability to pH (potential of hydrogen) value in the Fenton reaction process, and still has higher catalyzing activity under the condition of neutral pH value.

Description

technical field [0001] The present invention relates to a preparation method of a catalyst, in particular to a preparation method of a Fenton catalyst, and a Fenton catalyst prepared by the method, and further, an application of the Fenton catalyst. Background technique [0002] The Fenton reaction refers to the homogeneous catalytic reaction between ferrous ions and hydrogen peroxide under acidic conditions to generate strong oxidizing hydroxyl radicals. The reaction product hydroxyl radicals can further directly oxidize and decompose organic pollutants in water into CO 2 And water, so this reaction is often used in the treatment and disposal of organically polluted water bodies. In general, the homogeneous Fenton reaction rate is mainly affected by the following factors: 1) solution pH conditions, that is, ferrous ions and hydrogen peroxide have a maximum reaction rate at pH=3, but almost no reaction rate at pH neutral conditions. 2) the reaction rate of ferric ion, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/128B01J37/08C02F1/72C02F101/34C02F101/36C02F101/38
CPCC02F1/722C02F1/725B01J27/128B01J37/088C02F2305/10C02F2101/38C02F2101/36C02F2101/34C02F2101/345B01J35/393B01J35/23
Inventor 孙猛李多贾荣利
Owner 昆山中环科本科技发展有限公司
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