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Preparation method and application of efficient self-driven catalyst based on Fenton-like reaction and PMS activation

A catalyst, self-propelled technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. Tiny, accelerated mass transfer process effect

Pending Publication Date: 2021-12-31
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] In order to improve the degradation efficiency of pollutants, the above-mentioned heterogeneous catalysts usually need to cooperate with external machinery, so that the solution containing hydrogen peroxide, the catalyst and the pollutants can fully contact and react, which requires that the polluted water must be collected in practical applications. thus greatly limiting the range of

Method used

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  • Preparation method and application of efficient self-driven catalyst based on Fenton-like reaction and PMS activation
  • Preparation method and application of efficient self-driven catalyst based on Fenton-like reaction and PMS activation
  • Preparation method and application of efficient self-driven catalyst based on Fenton-like reaction and PMS activation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] In order to explore the effect of ultrasonic time on hollow pollen preparation. Disperse 16.0 g of untreated pollen in 100 mL of absolute ethanol, ultrasonicate for 0.5, 1.0, and 1.5 hours, respectively, and then filter and wash the treated pollen with a large amount of deionized water to obtain hollow pollen. Images were captured using the OLYMPUS cellSens Dimension system.

[0058] Such as figure 1 Shown, the general optical microscope image of the hollow pollen prepared in Example 1. Depend on figure 1 A It can be seen that when the ultrasonic treatment time is 0.5 hours, the images show that the translucency of the obtained pollen is different, which proves that the 0.5 hour ultrasonic treatment cannot completely dissolve the protein inside the native pollen. Depend on figure 1 B It can be seen that when the ultrasonic treatment time is 1.0 hour, the images show that the transparency of the obtained pollen is almost the same, which proves that the 1.0 hour ultra...

Embodiment 2

[0060] In order to explore the H 2 SO 4 Effects of concentration, water bath temperature and water bath time on carbonized pollen preparation. Disperse hollow pollen in 10 M H 2 SO 4 (100 mL), the mixed solution was placed in a water bath and heated to 60 °C, kept under magnetic stirring for 1.0 hour, then the product was collected by filtration and washed with a large amount of deionized water and ethanol until the filtrate was neutral to obtain carbonized pollen C 1 . Similarly, carbonized pollen C 2 by 15 M H 2 SO 4 , 80 ℃ water bath, and 1.5 hours of magnetic stirring were prepared under the experimental conditions. Carbonized pollen C photographed using a scanning electron microscope (SEM) 1 and carbonized pollen C 2 Image.

[0061] Such as figure 2 Shown, the SEM image of embodiment 2 gained. Depend on figure 2 A can be seen: carbonized pollen C 1 The structure is intact and free of collapse. Depend on figure 2 B can be seen: carbonized pollen C 2 The...

Embodiment 3

[0063] In order to explore the effect of potassium permanganate concentration and soaking time on MnO 2 The effect of @pollen preparation. Disperse 0.25 g of carbonized pollen in 50 mL of 0.1 M potassium permanganate solution, stir magnetically for 10 minutes, soak at room temperature for 2 hours, then filter and collect the product, wash it with a large amount of deionized water and ethanol, and store the product at 60 °C In the oven, keep for 12 hours to get MnO 2 @豆粉(M 1 ). Similarly, MnO 2 @豆粉(M 2 ) were prepared under the experimental conditions of 0.5 M potassium permanganate and soaking for 3 hours. MnO photographed using a scanning electron microscope (SEM) 2 @豆粉(M 1 ) and MnO 2 @豆粉(M 2 )Image.

[0064] Such as image 3 Shown, the SEM image of embodiment 3 gained. Depend on image 3 A can see: M 1 The amount of surface-modified manganese dioxide is small. Depend on image 3 B can see: M 2 The amount of manganese dioxide modified on the surface is relat...

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Abstract

The invention discloses a preparation method and application of an efficient self-driven catalyst based on Fenton-like reaction and PMS activation. Plant pollen is treated to obtain carbonized pollen, the carbonized pollen is fully soaked in potassium permanganate, then the carbonized pollen and magnetic Fe3O4 nanoparticles are fully oscillated, and the magnetic MnO2@pollen micromotor is obtained, wherein the micromotor is modified with MnO2 nanosheets capable of decomposing hydrogen peroxide, and in a solution containing hydrogen peroxide, the micromotor can be driven by bubbles generated by the micromotor to achieve autonomous movement. The Fenton-like reaction generated by the magnetic Fe3O4 nanoparticles can generate active free radicals required by pollutant degradation. In addition, the MnO2 and the Fe3O4 modified on the micromotor can activate the PMS, so that the pollutant degradation is further enhanced. The contact mass transfer process of the catalyst and pollutants is greatly enhanced, and the pollutant degradation efficiency is remarkably improved, and moreover, the raw materials and the preparation process meet the green and environment-friendly requirements.

Description

technical field [0001] The invention belongs to the field of inorganic nanometer materials and environment, relates to a multifunctional pollen material with self-driving characteristics, in particular to a magnetic Fe which can move autonomously in hydrogen peroxide solution 3 o 4 Nanoparticles and manganese dioxide-modified pollen microspheres and their application as catalysts for Fenton-like reactions and PMS activation for efficient degradation of high-concentration tetracycline wastewater. Background technique [0002] With the development of society and economy, the problem of global aquatic ecosystem pollution has become increasingly prominent, especially antibiotic water pollution caused by human activities and intensive agriculture, which not only destroys surface water and groundwater resources, but also poses a serious threat to human health. Unfortunately, the long-term presence of antibiotics in the natural environment may lead to the production of resistant g...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J35/02C02F1/72C02F101/30C02F101/38
CPCB01J23/8892B01J23/002C02F1/722C02F1/725C02F2101/38C02F2101/30C02F2305/026C02F2305/023B01J35/50B01J35/33
Inventor 王虹王珂马恩慧
Owner CHINA UNIV OF MINING & TECH
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