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Nano-catalyst for photo-aided Fenton oxidation and preparation method thereof

A nano-catalyst, -fe2o3 technology, applied in the field of nano-catalyst - α-Fe2O3 and its preparation, nano-catalyst and its preparation, can solve the problem that the removal efficiency of refractory organic matter needs to be improved, the change of catalyst concentration is sensitive, the initial concentration of iron ion Low-level problems, to achieve the effect of stable crystal form, dense crystal structure and high mechanical strength

Inactive Publication Date: 2013-02-27
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] 1. Unstable catalytic effect: In the reaction process of light-assisted Fenton oxidation to remove environmental hormone pollutants, the ferrous salt catalyst is added at one time, and its optimum concentration is not easy to control, and the reaction is more sensitive to changes in catalyst concentration
[0005] 2. Poor UV photocatalytic effect: In the reaction process of UV-assisted Fenton oxidation to remove environmental hormone pollutants, iron ions are generated by oxidation of ferrous ions, the initial concentration of iron ions is low, and the activation effect of light on the catalyst Difference
[0006] 3. The removal effect of environmental hormone pollutants needs to be improved. Environmental hormone substances are mostly refractory organic substances, and the removal efficiency of ferrous salt catalysts for refractory organic substances needs to be improved

Method used

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  • Nano-catalyst for photo-aided Fenton oxidation and preparation method thereof

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Embodiment 1

[0035] A kind of nano-catalyst for photo-assisted Fenton oxidation, the components are as follows, all in mole percent:

[0036] α-Fe 2 o 3 10%, ferrous sulfate 90%.

[0037] The preparation method of the above-mentioned light-assisted Fenton oxidation nano-catalyst, the steps are as follows:

[0038] (1) Preparation of α-Fe by hydrothermal method 2 o 3 , Fe(NO 3 ) 3 Solution and NaOH solution with a concentration of 0.3mol / L, stir evenly and then add 2-hydroxypropane-1,2,3-tricarboxylic acid to make the final concentration of 2-hydroxypropane-1,2,3-tricarboxylic acid 3mM, stirred for 13 minutes to prepare the precursor material for hydrothermal reaction, the precursor material accounted for 80% of the volume of the reactor; then, heated to 200 °C within 10 minutes, under the condition of a pressure of 2.4MPa, heat preservation for 7h , placed in the air and naturally lowered to room temperature; washed with deionized water, centrifuged 7 times, dehydrated with absolute...

Embodiment 2

[0042] A kind of nano-catalyst for photo-assisted Fenton oxidation, the components are as follows, all in mole percent:

[0043] α-Fe 2 o 3 40%, ferrous sulfate 60%.

[0044] The preparation method is as described in Example 1.

Embodiment 3

[0046] A kind of nano-catalyst for photo-assisted Fenton oxidation, the components are as follows, all in mole percent:

[0047] α-Fe 2 o 3 60%, ferrous sulfate 40%.

[0048] The preparation method is as described in Example 1.

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Abstract

The invention relates to a nano-catalyst for photo-aided Fenton oxidation and a preparation method thereof. The nano-catalyst comprises, by mole percent, 10-70% of alpha-Fe2O3 and 30-90% of ferrite. According to the nano-catalyst for the photo-aided Fenton oxidation, the alpha-Fe2O3 is used for partly replacing a ferrite catalyst used for the photo-aided Fenton oxidation all the time, the photo-aided Fenton oxidation reaction effect is improved obviously, the degree of sensitivity of the catalytic system to ultraviolet light is increased, the application range of the catalyst is enlarged, and the amount is easy to control.

Description

technical field [0001] The present invention relates to a nano-catalyst for photo-assisted Fenton oxidation and a preparation method thereof, in particular to a nano-catalyst—α-Fe required for photo-assisted Fenton oxidation to remove environmental hormone pollutants in water supply and reuse water 2 o 3 The invention and a preparation method thereof belong to the technical field of water treatment materials. Background technique [0002] Refractory environmental hormones such as polychlorinated biphenyls, polycyclic aromatic hydrocarbons, phthalates, phenols and organochlorine pesticides are one of the main problems in the process of urban water supply and sewage reuse. Light-assisted Fenton oxidation is the main technology to control refractory organic wastewater, and it has advantages that other treatment methods cannot match. At present, the catalysts used in the light-assisted Fenton oxidation, especially the ultraviolet light-assisted Fenton oxidation, are ferrous sa...

Claims

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Application Information

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IPC IPC(8): B01J23/745C02F1/32C02F1/72
Inventor 刘静王杰孙金诚孙翠珍王田妮
Owner SHANDONG JIANZHU UNIV