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Gas-solid phase photo-Fenton catalyst, and preparation method and application thereof

A catalyst, gas-solid phase technology, applied in the field of gas-solid phase photo-Fenton catalyst and its preparation, which can solve the problems of strict reaction conditions, rapid recombination, and high cost of waste water

Active Publication Date: 2021-09-14
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Fenton's reagent has incomparable advantages in the treatment of organic wastewater that is difficult to degrade or general chemical oxidation is difficult to achieve, but the cost of using Fenton's reagent alone to treat wastewater will be very high
Moreover, the Fenton reaction is usually applied in the liquid phase, and there are strict reaction conditions, and it is easy to quickly recombine after forming a strong oxidizing free radical and be consumed ineffectively.

Method used

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  • Gas-solid phase photo-Fenton catalyst, and preparation method and application thereof
  • Gas-solid phase photo-Fenton catalyst, and preparation method and application thereof
  • Gas-solid phase photo-Fenton catalyst, and preparation method and application thereof

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preparation example Construction

[0036] According to an embodiment provided by the present invention, it is a method for preparing a gas-solid phase photo-Fenton catalyst, characterized in that it comprises the following steps:

[0037] S1. Take a microwave reaction tube, add a metal source and ultrasonically disperse it in N'N-dimethylformamide (DMF), add the ligand under constant stirring, and add concentrated hydrochloric acid as a morphology regulator after it is completely dissolved, and stir After mixing, put it into the microwave reaction chamber;

[0038]S2. Control the microwave power in the microwave reaction chamber to 800-1400w, the initial pressure is 0-35bar, and the reaction temperature is 80-200°C. After the reaction is completed, after cooling to room temperature, the material is centrifugally washed and vacuum-dried to obtain a powdered MOF material;

[0039] S3. Then add MOF material to the reaction tube such as polytetrafluoroethylene tube, disperse in the organic solution, stir for 5 minu...

Embodiment 1

[0053] S1. Take a clean quartz microwave reaction tube and place it on the microwave reaction rack, first add 40mL N’N-dimethylformamide (DMF), then add 932mg (4mmol) metal source zirconium tetrachloride (ZrCl 4 , 233 g / mol), after ultrasonic dispersion, 724 mg (4 mmol) of ligand 2-aminoterephthalic acid (NH 2 -H 2 BDC, 181g / mol), after being completely dissolved, add 0.67mL concentrated hydrochloric acid, after stirring evenly, the microwave reaction rack is transferred into the microwave reaction chamber containing 150mL deionized water and seals the reaction chamber;

[0054] S2. In the microwave reaction chamber, the heating time is controlled to be 10min, the microwave power is 1200w, the initial pressure is 35bar, the reaction temperature is 120°C, and the reaction time is 45min. After cooling to room temperature, the material is washed 4 times by centrifugation with DMF and methanol respectively. And vacuum dried to obtain 1.2g light yellow powder sample NH 2 -UIO-66 ...

Embodiment 2

[0064] The steps of this embodiment and embodiment 1 are basically the same, the only difference is:

[0065] In step S1, add 932mg (4mmol) metal source zirconium tetrachloride (ZrCl 4 , 233g / mol), after ultrasonic dispersion, add 362mg (2mmol) ligand 2-aminoterephthalic acid (NH 2 -H 2 BDC, 181 g / mol).

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Abstract

A preparation method of a gas-solid phase photo-Fenton catalyst is disclosed in the invention, and comprises the following steps: S1, taking a microwave reaction tube, adding a metal source, ultrasonically dispersing the metal source in DMF, adding a ligand under a continuous stirring condition, adding concentrated hydrochloric acid as a morphology regulating agent after the ligand is completely dissolved, stirring and mixing, and putting the mixture into a microwave reaction cavity; S2, reacting in the microwave reaction cavity, cooling to room temperature after the reacting is completed, centrifugally washing the material, and performing vacuum drying to obtain a solid MOF material; and S3, adding the MOF material into a reaction tube, dispersing the MOF material in an organic solution, stirring, adding an iron source, continuously stirring, carrying out microwave treatment on the stirred solution, cooling to room temperature after the reaction is finished, and carrying out centrifugal washing and vacuum drying to obtain the photo-Fenton catalyst. The invention also provides the gas-solid phase photo-Fenton catalyst and application thereof. The Fenton reaction of a gas-solid interface is coupled to the photocatalyst, and the gas pollutant NOX is degraded by utilizing the free radicals with superstrong oxidation performance generated by the Fenton reaction and the green economy of photocatalysis.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, and relates to a gas-solid phase photo-Fenton catalyst and its preparation method and application. Background technique [0002] Atmospheric pollutants mainly come from fossil fuel combustion in industries and power plants, and vehicle exhaust emissions. They are one of the main gas pollutants that cause environmental problems such as acid rain, smog, and photochemical smog. Not only does it seriously endanger the natural environment, but the acid rain and smog produced at the same time can cause severe respiratory diseases, cardiopulmonary diseases, and even premature death, seriously endangering human health. For one of the main pollutants NO X , although some conventional NO X Emission reduction technologies, such as adsorption, selective non-catalytic reduction (SNCR), selective catalytic reduction (SCR), etc., can effectively remove high concentrations of NO in combustion exhaust X...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J37/34B01D53/56B01D53/86B01D53/00
CPCB01J31/1691B01J31/2217B01J31/2239B01J37/346B01D53/8628B01D53/007B01D2257/404B01D2258/06B01D2251/106B01D2255/802B01J2531/48B01J35/39
Inventor 张蝶青曹海燕贾俊粉张少杨清羽李贵生
Owner SHANGHAI NORMAL UNIVERSITY
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