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A kind of preparation method of cerium-doped plasma catalyst

A plasma and catalyst technology, applied in the field of ionic catalyst preparation, can solve the problems of low pollutant removal efficiency, generation of by-products, easy generation of by-products and energy consumption, etc., to avoid by-products, improve removal efficiency, and achieve preparation conditions. mild effect

Active Publication Date: 2017-02-22
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

ZL 201210034920.6 reported the preparation of ferroelectric materials and TiO 2 The combination of hybrid materials for the removal of pollutants improves the treatment effect, but the organic binder epoxy used in the patent produces by-products during the discharge process
At present, this technology still has problems such as low pollutant removal efficiency, easy generation of by-products and high energy consumption.

Method used

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  • A kind of preparation method of cerium-doped plasma catalyst
  • A kind of preparation method of cerium-doped plasma catalyst
  • A kind of preparation method of cerium-doped plasma catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Catalytic material pretreatment, take nano-scale TiO 2 and ferroelectric powder materials were placed in two beakers, respectively, and were ultrasonically dispersed with deionized water and hydrochloric acid solution for 1 hour, and left to stand, and then the powder was washed with deionized water several times until neutral, suction filtered, and placed in Dry in the oven for later use;

[0023] (2) placing the powder material after pretreatment in step (1) in two mortars for repeated grinding;

[0024] (3) Weigh two kinds of materials in a certain amount of step (2) and ultrasonically stir in industrial silica sol solution for 0.5h, wherein nano-scale TiO 2 The mass ratio of ferroelectric material is 10%:90%;

[0025] (4) adding a cerium-containing compound with a mass ratio of 1.5% to the catalytic material into the solution of step (3), and ultrasonically stirring for 1 h;

[0026] (5) γ-Al 2 o 3 The carrier is first washed with hydrochloric acid solution...

Embodiment 2

[0030] (1) Catalytic material pretreatment, take nano-scale TiO 2 and ferroelectric powder materials were placed in two beakers, respectively, and were ultrasonically dispersed with deionized water and hydrochloric acid solution for 1.5h, and left to stand, and then the powder was washed with deionized water several times until neutral, suction filtered, and placed Dry in an oven for later use;

[0031] (2) placing the powder material after pretreatment in step (1) in two mortars for repeated grinding;

[0032] (3) Take a certain amount of two materials in step (2) and ultrasonically stir for 1h in industrial silica sol solution, wherein nano-scale TiO 2 The mass ratio of ferroelectric material is 50%: 50%;

[0033] (4) adding a cerium-containing compound with a mass ratio of 3% to the catalytic material into the solution of step (3), and ultrasonically stirring for 1.5 h;

[0034] (5) γ-Al 2 o 3 The carrier is first washed with hydrochloric acid solution to remove impuri...

Embodiment 3

[0038] (1) Catalytic material pretreatment, take nano-scale TiO 2 and ferroelectric powder materials, respectively placed in two beakers, successively ultrasonically dispersed with deionized water and hydrochloric acid solution for 2 hours, let stand, and then washed the powder with deionized water several times until neutral, suction filtered, placed in Dry in the oven for later use;

[0039] (2) placing the powder material after pretreatment in step (1) in two mortars for repeated grinding;

[0040] (3) Weigh a certain amount of two materials in step (2) and ultrasonically stir for 2h in industrial silica sol solution, wherein nano-scale TiO 2 The mass ratio of ferroelectric material is 30%: 70%;

[0041] (4) adding a cerium-containing compound with a mass ratio of 4.5% to the catalytic material into the solution of step (3), and ultrasonically stirring for 2 hours;

[0042] (5) γ-Al 2 o 3 The carrier is first washed with hydrochloric acid solution to remove impurities on...

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Abstract

A preparation method of a Ce-doped plasma catalyst belongs to the technical field of plasma catalyst preparation, is used for removing volatile organic pollutants, and comprises the following steps: grinding catalytic materials after pretreatment; carrying out ultrasonic stirring on the ground materials in an industrial silica sol solution for 0.5 to 2 hours, wherein the mass proportion of nanoscale TiO2 to a ferroelectric material is (50%-10%) to (50%-90%); adding a Ce-containing compound into the solution, and carrying out ultrasonic stirring for 0.5 to 2 hours; cleaning Gamma-Al2O3, drying the cleaned Gamma-Al2O3, placing the dried Gamma-Al2O3 into the solution, carrying out ultrasonic treatment during stirring, drying the mixture at 105 DEG C, placing the dried mixture into a muffle furnace for 0.5 to 2 hours' roasting at 200 to 300 DEG C, and carrying out 2 to 4 hours' roasting at 400 to 600 DEG C. The preparation method is simple to operate and environmentally friendly. According to the method, the silica sol solution serves as an adhesive and a dispersant to ensure that the catalyst can disperse on the surface of a carrier relatively uniformly, and the Ce-containing compound is used for modifying the catalytic materials, the catalytic reaction incidence and the pollutant catalyzing efficiency can be improved more conveniently.

Description

technical field [0001] The invention belongs to the technical field of plasma catalyst preparation, and in particular relates to a cerium-doped plasma catalyst material and a preparation method thereof, which can be used for the removal of volatile organic pollutants. Background technique [0002] With the frequent occurrence of smog weather, it brings inconvenience to people's life and causes great harm to people's health. How to control smog weather has aroused great concern of people. Volatile organic compounds are important precursors of fine particles of urban air pollutants, which aggravate the appearance of haze weather, so the control of volatile organic compounds is imminent. Volatile organic compounds (VOCs) are the most common pollutants emitted in industrial production. Most of these substances are toxic, which not only cause damage to the surrounding environment, but also cause irreversible damage to human health. For this reason, western countries have promulg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/10B01J23/14B01D53/86B01D53/44B01D53/72
Inventor 梁文俊王爱华李坚樊星何洪
Owner BEIJING UNIV OF TECH
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