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Preparation method of Fe-MnO2 catalyst for purifying VOCs through efficient photo-thermal synergistic catalysis

A photothermal synergistic, catalytic purification technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effects of easy industrialization, cost reduction, and simple process

Inactive Publication Date: 2017-07-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned various problems existing in the existing VOCs pollution control technology, and to provide a Fe-MnO with high-efficiency photothermal synergistic catalytic purification of VOCs 2 Catalyst preparation method

Method used

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  • Preparation method of Fe-MnO2 catalyst for purifying VOCs through efficient photo-thermal synergistic catalysis
  • Preparation method of Fe-MnO2 catalyst for purifying VOCs through efficient photo-thermal synergistic catalysis
  • Preparation method of Fe-MnO2 catalyst for purifying VOCs through efficient photo-thermal synergistic catalysis

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Embodiment 1

[0033] A kind of Fe-MnO with efficient photothermal synergistic catalytic purification of VOCs 2 The preparation method of composite catalyst (Fe / Mn mol ratio 1:10), concrete steps are as follows:

[0034] (1) Weigh 0.01molMn(NO 3 ) 2 and 0.003mol FeSO 4 ·7H 2 O, added successively to the 3 (AR, 66wt%, the same below) in the beaker, magnetic stirring, obtain FeSO 4 with Mn(NO 3 ) 2 mixed solution;

[0035] (2) Add 0.02mol KMnO to the mixed solution 4 , magnetically stirred, the obtained mixed solution was sealed well, put it in an oven at 75°C, and carried out hydrothermal redox reaction, and the reaction time was 36h;

[0036] (3) After the reaction is completed, the beaker is cooled to room temperature, and the precipitate in the beaker is taken out, filtered, washed, and dried to obtain Fe-MnO with photothermal synergistic catalytic purification of VOCs 2 Composite catalyst.

Embodiment 2

[0072] Fe-MnO with efficient photothermal synergistic catalytic purification of VOCs 2 The preparation method of composite catalyst (Mg / Mn molar ratio is 1:32) is as follows:

[0073] (1) Weigh 0.01molMn(NO 3 ) 2 and 0.0009375 mol FeSO 4 ·7H 2 O, added successively to the solution containing 99ml water and 1ml concentrated HNO 3 In the beaker, magnetically stirred, FeSO 4 with Mn(NO 3 ) 2 mixed solution;

[0074] (2) Add 0.02mol KMnO to the mixed solution 4 , carry out magnetic stirring, seal the obtained mixed solution well, put it in a 75°C oven, and carry out hydrothermal oxidation-reduction reaction;

[0075] (3) After reacting for 36 hours, wait for the beaker to cool to room temperature, take out the precipitate in the beaker, filter, wash, and dry to obtain Fe-MnO with photothermal synergy 2 Composite catalyst.

Embodiment 3

[0084] Fe-MnO with efficient photothermal synergistic catalytic purification of VOCs 2 The preparation method of composite catalyst (Mg / Mn molar ratio is 1:16) is as follows:

[0085] (1) Weigh 0.01molMn(NO 3 ) 2 and 0.001875mol FeSO 4 ·7H 2 O, added successively to the solution containing 99ml water and 1ml concentrated HNO 3 In the beaker, magnetically stirred, FeSO 4 with Mn(NO 3 ) 2 mixed solution;

[0086] (2) Add 0.02mol KMnO to the mixed solution 4 , carry out magnetic stirring, seal the obtained mixed solution well, put it in a 75°C oven, and carry out hydrothermal oxidation-reduction reaction;

[0087] (3) After reacting for 36 hours, wait for the beaker to cool to room temperature, take out the precipitate in the beaker, filter, wash, and dry to obtain Fe-MnO with photothermal synergy 2 Composite catalyst.

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Abstract

The invention relates to a preparation method of a Fe-MnO2 catalyst for purifying VOCs through efficient photo-thermal synergistic catalysis. The preparation method has the beneficial effects that a target catalyst is only synthesized from soluble Fe(II) salt, Mn(II)salt and KMnO4 which are low in cost and easily available through hydrothermal reaction, reaction conditions are mild, the process is simple, no additive is added, the high-temperature calcination is not required, and heavy metals do not need to be loaded, so that the production cost is greatly lowered. A Fe-doped MnO2 composite catalyst prepared by virtue of the preparation method has very strong absorbency in an ultraviolet spectrum, a visible spectrum and an infrared spectrum and has efficient catalytic activity and stability for photoinduced thermocatalytic degradation of VOCs in the ultraviolet spectrum, the visible spectrum, the infrared spectrum and a full spectrum, and the photoinduced thermocatalytic activity of the catalyst is far higher than that of commercial TiO2 (P25) as a standard photocatalyst, and the deficiency that TiO2 (P25) only has ultraviolet light catalytic activity is overcome.

Description

technical field [0001] The invention relates to the technical field of catalyst synthesis, in particular to a Fe-MnO with high-efficiency photothermal synergistic catalytic purification of VOCs 2 Catalyst preparation method. Background technique [0002] Volatile organic compounds (VOCs) are the main components of air pollutants. The high-concentration VOCs emitted by many industries such as paint, petrochemical, electrical and automotive coatings, pharmaceuticals, and electronics have seriously endangered human health and the ecological environment. also pose a serious threat. On the one hand, VOCs pollute the ecological environment. Under the irradiation of ultraviolet light, VOCs will interact with other gas pollutants in the atmosphere such as SO 2 , NO x And other chemical components react to generate secondary pollutants such as photochemical smog and secondary organic aerosols, and destroy the ozone layer and increase the greenhouse effect. On the other hand, VOCs...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01D53/86B01D53/72
CPCB01D53/8668B01J23/8892B01J37/10B01D2257/708B01J35/39
Inventor 李远志陈俭毛明杨方时明杨懿
Owner WUHAN UNIV OF TECH
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