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Photo-Fenton catalyst and preparation method and application thereof

A catalyst, Fenton's technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of poor degradation effect, low light utilization efficiency, poor adsorption of organic waste gas, etc., and achieve good degradation effect , Increase adsorption performance, easy to recycle effect

Pending Publication Date: 2019-10-08
NANJING UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The photo-Fenton catalysts currently studied still have problems such as poor adsorption of organic waste gas, low light utilization efficiency, and poor degradation effect.

Method used

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  • Photo-Fenton catalyst and preparation method and application thereof
  • Photo-Fenton catalyst and preparation method and application thereof
  • Photo-Fenton catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Add 0.434 g Ce(NO 3 ) 3 6H 2 O was dissolved in 4.5 mL deionized water and stirred continuously to obtain a uniform cerium nitrate solution, which was designated as solution A. 1.5 g carrier γ-Al 2 o 3 After soaking in the above solution A, continue to stir for 2 h;

[0021] (2) Dissolve 5.5 g of 2-methylimidazole in 20 mL of deionized water and stir it so that the 2-methylimidazole is completely dissolved, which is recorded as solution B, and the B solution is transferred to a pear-shaped separatory funnel , slowly drop it into the mixture formed by the carrier and solution A, and stir for 6 h during the dropwise addition;

[0022] (3) After the stirring, the mixed solution formed by the above solution B, solution A and the carrier was washed with methanol solution, filtered and the pH was adjusted to neutral, and then dried in a vacuum oven at 80 °C for 12 h to obtain Ce -MOF / γ-Al 2 o 3 spare;

[0023] (4) Dissolve 0.085 g of o-phthalaldehyde (OPA) in 25 m...

Embodiment 2

[0027] (1) Add 0.868 g Ce(NO 3 ) 3 6H 2 O was dissolved in 9 mL of deionized water and stirred continuously to obtain a uniform cerium nitrate solution, which was designated as solution A, and 2 g of carrier γ-Al 2 o 3 Immerse in the above solution A, and continue to stir for 2 h;

[0028] (2) Dissolve 5 g of 2-methylimidazole in 20 mL of deionized water, and stir it to completely dissolve the 2-methylimidazole, record it as solution B, and transfer solution B to a pear-shaped separatory funnel , slowly drop it into the mixture formed by the carrier and solution A, and stir for 6 h during the dropwise addition;

[0029] (3) After the stirring, the mixed solution formed by the above solution B, solution A and the carrier was washed with methanol solution, filtered and the pH was adjusted to neutral, and then dried in a vacuum oven at 60 °C for 12 h to obtain Ce -MOF / γ-Al 2 o 3 spare;

[0030] (4) Dissolve 0.085 g of o-phthalaldehyde (OPA) in 25 mL of absolute ethanol so...

Embodiment 3

[0034] (1) Add 0.434 g Ce(NO 3 ) 3 ·6H 2 O was dissolved in 4.5 mL deionized water and stirred continuously to obtain a uniform cerium nitrate solution, which was designated as solution A. 1.5 g carrier γ-Al 2 o 3 After soaking in the above solution A, continue to stir for 2 h;

[0035] (2) Dissolve 5 g of 2-methylimidazole in 20 mL of deionized water, and stir it to completely dissolve the 2-methylimidazole, record it as solution B, and transfer solution B to a pear-shaped separatory funnel , making it dropwise slowly into the mixture formed by the carrier and solution A, stirring for 8 h during the dropwise addition;

[0036] (3) After the stirring, the mixed solution formed by the above solution B, solution A and carrier was washed with methanol solution, filtered and the pH was adjusted to neutral, and then dried in a vacuum oven at 80 °C for 8 h to obtain Ce -MOF / γ-Al 2 o 3 spare;

[0037] (4) Dissolve 0.085 g of o-phthalaldehyde (OPA) in 25 mL of absolute ethanol...

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Abstract

The invention discloses a photo-Fenton catalyst and a preparation method and application thereof. The preparation method comprises the following steps that a Ce-MOF film structure is formed on gamma-Al2O3 firstly, after vacuum drying, the Ce-MOF film structure is dipped in an OPA solution, an alkylation reaction is conducted, then alpha-FeOOH is generated on a formed compound through an in-situ growing method, and thus the compound-type photo-Fenton catalyst is obtained. The MOF structure with hydrophobic performance is formed on the gamma-Al2O3, the adsorption performance of VOCs can be enhanced, electronic transmissibility is strengthened, Fe<3+> is promoted to be reduced into Fe<2+>, meanwhile, Ce-MOF has abundant acid sites, and generating of a photo-Fenton catalytic oxidation reactionis also facilitated. Organic groups on MOF and the in-situ growing mode of the alpha-FeOOH can prevent iron leaching, the stability of the catalyst can be further improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to the field of catalytic degradation of VOCs, in particular to a photo-Fenton catalyst α-FeOOH / Ce-MOF / γ-Al 2 o 3 And its preparation method and application. Background technique [0002] At present, my country's economy maintains a medium-to-high speed development, and the technical aspects of industrial production and automobile manufacturing are constantly optimized, but a large amount of refractory organic waste gas is still produced, which poses a great threat to people's homes, so catalytic degradation of VOCs , has become an urgent task to deal with environmental pollution. The photo-Fenton degradation method is an advanced oxidation technology that can generate a large amount of OH, which is extremely oxidizing and can destroy the difficult-to-degrade organic molecular structure and convert it into small molecular substances, thereby achieving the degradation of VOCs Effect. Compared with other treatment methods, the ...

Claims

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Application Information

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IPC IPC(8): B01J31/28B01D53/86B01D53/72B01D53/44
CPCB01J31/28B01D53/8687B01D53/864B01D2257/708B01J35/39
Inventor 陈英文高宁范梦婕沈树宝祝社民
Owner NANJING UNIV OF TECH
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