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Low-temperature plasma catalyst, and preparation method and application thereof

A low-temperature plasma and catalyst technology, applied in the field of catalytic chemistry, can solve the problems of ineffective photocatalysis, increased energy consumption, weak ultraviolet light, etc., and achieve the effect of increasing ultraviolet light intensity, increasing electric field intensity, and simple use process

Active Publication Date: 2012-08-01
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Plasma synergistic photocatalytic removal of harmful compounds is a method for efficient oxidation and removal of organic pollutants (such as patents 200410102345.4, 01805477.3, 200710009641.3), but the ultraviolet light generated by plasma is relatively weak, which cannot make the photocatalytic effect effective. Therefore, increasing the ultraviolet light source in the reactor has become a research hotspot, but at the same time increases the energy consumption

Method used

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  • Low-temperature plasma catalyst, and preparation method and application thereof
  • Low-temperature plasma catalyst, and preparation method and application thereof
  • Low-temperature plasma catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) For 4-6mm Al 2 o 3 The pellets are pretreated by first soaking in 1mol / L nitric acid solution for 12 hours, then soaking in 1mol / L NaOH solution for 12 hours to remove impurities, and then washing them repeatedly with deionized water until the rinse water is neutral. The washed carrier was dried in a drying oven at 60° C. for 12 hours, and placed in a desiccator for use.

[0027] (2) Select nano-scale BaTiO with the same particle size range (20-60nm) 3 Powder 16.7g with nano TiO 2 8.3g of powder (mass ratio: 2:1) was placed in a mortar and repeatedly ground and then mixed.

[0028] (3) Take 25g of epoxy resin and 6ml of curing agent, put them in a beaker and stir. During the stirring process, 5ml of absolute ethanol was added to facilitate uniform mixing. After the resin is mixed, add the mixed powder prepared in step (2), and continue to stir to make the powder evenly dispersed in the colloidal liquid.

[0029] (4) The mixture is placed in an ultrasonic devic...

Embodiment 2

[0033] (1) For 4-6mm Al 2 o 3 The pellets are pretreated, soaked in 1.5mol / L nitric acid solution for 13 hours, then soaked in 1.5mol / L NaOH solution for 13 hours to remove impurities, and then washed repeatedly with deionized water until the rinse water is neutral . The washed carrier was dried in a drying oven at 60° C. for 12 hours, and placed in a desiccator for use.

[0034] (2) Select nano-scale BaTiO with the same particle size range (20-60nm) 3 Powder 12.5g with nano TiO 2 12.5g of powder (mass ratio 1:1), put in a mortar and grind repeatedly and then mix.

[0035] (3) Take 25g of epoxy resin and 6ml of curing agent, put them in a beaker and stir. During the stirring process, 6ml of absolute ethanol was added to facilitate uniform mixing. After the resin is mixed, add the mixed powder prepared in step (2), and continue to stir to make the powder evenly dispersed in the colloidal liquid.

[0036](4) The mixture is placed in an ultrasonic device, and the ultrasoni...

Embodiment 3

[0040] (1) For 4-6mm Al 2 o 3 The pellets are pretreated by first soaking in 2mol / L nitric acid solution for 15 hours, then soaking in 2mol / L NaOH solution for 15 hours to remove impurities, and then washing them repeatedly with deionized water until the rinse water is neutral. The washed carrier was dried in a drying oven at 60° C. for 12 hours, and placed in a desiccator for use.

[0041] (2) Select nano-scale BaTiO with the same particle size range (20-60nm) 3 Powder 8.3g with nano TiO 2 16.7g of powder (mass ratio: 1:2), put in a mortar and grind repeatedly and then mix.

[0042] (3) Take 25g of epoxy resin and 6ml of curing agent, put them in a beaker and stir. During the stirring process, 7ml of absolute ethanol was added to facilitate uniform mixing. After the resin is mixed, add the mixed powder prepared in step (2), and continue to stir to make the powder evenly dispersed in the colloidal liquid.

[0043] (4) The mixture is placed in an ultrasonic device, and th...

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Abstract

Low-temperature plasma catalyst, and a preparation method and application thereof belong to the field of catalytic chemistry. The low-temperature plasma catalyst is formed by loading nano-scale mixture of barium titanate and titanium dioxide on the surfaces of Al2O3 particles. Mass ratio of the barium titanate and the titanium dioxide is 2:1-1:2. The preparation method includes: sequentially using nitric acid solution, NaOH solution and water to pretreat Al2O3 particulate carrier and drying; mixing nano-scale BaTiO3 and TiO2 powder according to the mass ratio of 2:1-1:2 and grinding, and dispersing the mixture to mixture of epoxy resin, firming agent and absolute ethyl alcohol to form emulsion; dispersing the treated Al2O3 particles into the emulsion, and allowing both resin and the powder mixture to adhere to the surfaces of the particles form adhesive layers; and pulling out the loaded Al2O3 particles, and naturally drying the particles in air. The low-temperature plasma catalyst enables removal rate of organic pollutant to be increased and power consumption to be lowered.

Description

technical field [0001] The invention relates to a novel plasma catalyst, preparation method and application, which can be used for the removal of volatile organic pollutants and belongs to the field of catalytic chemistry. Background technique [0002] At present, with the improvement of living standards, people's environmental awareness and requirements for environmental quality are increasing, the control technology of volatile organic pollutants is getting more and more attention from people, and various air purifiers used to remove VOCs are used developed accordingly. Among them, absorption and adsorption methods are widely used because of their simplicity, but they have disadvantages such as large investment, long cycle, and high operating costs. [0003] Low-temperature plasma and photocatalytic technologies are environmental pollution control technologies that have emerged in recent years. They have the advantages of mild reaction conditions, thorough reactions, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/02B01D53/76B01D53/86B01D53/44B01D53/72
Inventor 梁文俊马琳李坚刘欢
Owner BEIJING UNIV OF TECH
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