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Preparation method, product and application of supported ozone catalyst

A catalyst, supported technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of low adsorption performance, catalyst falling off, catalyst and carrier combination Insufficient and other problems, to achieve the effect of speeding up the speed, improving the bonding force, and not easy to fall off

Active Publication Date: 2019-11-29
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The specific surface area of ​​the ozone catalyst prepared by the granulation method is much lower than that of porous materials such as activated carbon or molecular sieve, and the adsorption performance is not high, while the impregnation method has a large specific surface area and high adsorption performance, but the catalyst is not firmly combined with the carrier. During the wastewater treatment process, a certain proportion of the catalyst will fall off from the surface of the carrier

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Mix zinc diacetate and ethanol at a mass ratio of 1:200 to obtain a zinc diacetate alcohol solution. The modified activated carbon was immersed in the zinc diacetate alcohol solution for 0.5 h, and the activated carbon was taken out and dried in an oven at 80 °C for 2 h, then impregnated and then dried, repeated three times, and finally calcined in a muffle furnace at 300 °C for 4 h, namely Obtain the catalyst support of zinc oxide thin film on the surface;

[0028] (2) Potassium permanganate and water were mixed at a mass ratio of 1:250, and then ultrasonically dissolved to obtain potassium permanganate solution; the catalyst carrier loaded with zinc oxide film and potassium permanganate solution were transferred to a 20 mL liner Seal it in a polytetrafluoroethylene stainless steel reaction kettle, put it in an oven, heat it to 120 °C for 4 h, and then cool it naturally to room temperature to obtain the product. After the product was washed three times with deioni...

Embodiment 2

[0031] (1) Mix zinc diacetate and ethanol at a mass ratio of 1:250 to obtain a zinc diacetate alcohol solution. The modified activated carbon was immersed in the zinc diacetate alcohol solution for 1 h, and the activated carbon was taken out and baked in an oven at 90 °C for 1.5 h, then impregnated and then dried, repeated three times, and finally calcined in a muffle furnace at 350 °C for 3 h, namely Obtain the catalyst support of zinc oxide thin film on the surface;

[0032] (2) Potassium permanganate and water were mixed at a mass ratio of 1:300, and then ultrasonically dissolved to obtain potassium permanganate solution; the catalyst carrier loaded with zinc oxide film and potassium permanganate solution were transferred to a 20 mL liner Seal it in a polytetrafluoroethylene stainless steel reaction kettle, put it in an oven, heat it to 140 °C for 3.5 h, and then cool it naturally to room temperature to obtain the product. After the product was washed three times with deio...

Embodiment 3

[0035] (1) Mix zinc diacetate and ethanol at a mass ratio of 1:300 to obtain a zinc diacetate alcohol solution. Immerse the modified activated carbon in the zinc diacetate alcohol solution for 1.5 h, take out the activated carbon and dry it in an oven at 100 °C for 1 h, then impregnate it and dry it again, repeat this process for 3 times, and finally calcinate it in a muffle furnace at 400 °C for 2 h, that is Obtain the catalyst support of zinc oxide thin film on the surface;

[0036] (2) Potassium permanganate and water were mixed at a mass ratio of 1:150, and then ultrasonically dissolved to obtain potassium permanganate solution; the catalyst carrier loaded with zinc oxide film and potassium permanganate solution were transferred to a 20 mL liner Seal it in a polytetrafluoroethylene stainless steel reaction kettle, put it in an oven, heat it to 150 °C for 3 h, and then cool it naturally to room temperature to obtain the product. After the product was washed three times wit...

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PUM

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Abstract

The invention relates to a preparation method of a loaded ozone catalyst, a product of the preparation method and application of the product. The preparation method comprises the steps of loading of azinc oxide film on the surface of modified activated charcoal and in-situ growth of manganese dioxide nano-wires on the zinc oxide film. Compared with ozone catalysts prepared by the conventional dipping method, the method comprises the steps of loading the zinc oxide film to the surface of the cylindrical modified activated charcoal carrier, and then, growing the manganese dioxide nano-wires onthe film in an in-situ growth manner, thus, a binding force between the catalyst and the carrier is increased, and an active area of the ozone catalyst is greatly increased, so that the decompositionof ozone is accelerated to produce a hydroxyl free radical, and then, a rate of oxidation of organic matters in pesticide wastewater is accelerated. The ozone catalyst is simple in preparation, high in catalysis efficiency and difficult in spalling and can be reused.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a preparation method of a supported ozone catalyst and its product and application, especially the application in pesticide wastewater treatment. Background technique [0002] Ozone catalytic oxidation technology is an efficient wastewater advanced treatment technology, and it is a research hotspot in the field of industrial wastewater treatment in recent years. Compared with ozone alone as an oxidizing agent, the hydroxyl radicals produced by the interaction of ozone and catalysts have stronger oxidizing ability and faster oxidation rate for organic matter in wastewater, and can oxidize almost all pollutants. Compared with the homogeneous ozone catalytic oxidation technology, the catalyst in the heterogeneous ozone catalytic oxidation technology exists in solid form, which is easy to separate from the wastewater and can be reused. It is widely used in the actual w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34C02F1/78C02F101/30
Inventor 何丹农代卫国童琴邓洁赵昆峰金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH