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A kind of preparation method of formaldehyde degradable ag/zno composite material

A composite material and formaldehyde technology, applied in the field of photocatalyst preparation, to achieve the effect of improving charge separation, photocatalytic effect and photocatalytic activity

Active Publication Date: 2021-03-26
苏州湘淮环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing popular photocatalysts on the market can only function under the condition of ultraviolet rays, or use hybridization methods, such as nitrogen hybridization, to change the position of the conduction band, so that visible light can be absorbed for photocatalysis

Method used

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  • A kind of preparation method of formaldehyde degradable ag/zno composite material

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Embodiment 1

[0030] A method of preparing an Ag / ZnO composite material that degrates formaldehyde, including the following steps:

[0031] (1) Nano ZnO particles were prepared: 50 mL of 1 mol / lzn (NO3) 2 solution was added to a 200 ml of beaker, and 50 ml of 2 mol / l NaOH solution was added while stirring. Stay for a day. The resulting precipitate was filtered, washed, and dried in an oven at 80 ° C. The dry precipitate was placed in a muffle furnace for 3 h. The ZnO nanoparticles can be obtained after cooling.

[0032] (2) Preparation of Ag / ZnO: Ag nanoparticle is uniformly dispersed by physical vapor deposition on the ZnO nanoparticles made of step (1), forming Ag / ZnO composite nanoparticles, physical vapor deposition, first vacuum 0.05 ppa, and maintain a vacuum no less than 0.1 Pa, ZnO and Ag mass ratio of 20: 1.

[0033] The Ag / ZnO complex nanoparticles prepared by the present embodiment were placed in the reactor, and the test of formaldehyde treatment was performed. As a resu...

Embodiment 2

[0036] A method of preparing an Ag / ZnO composite material that degrates formaldehyde, including the following steps:

[0037] (1) Nano ZnO particles were prepared: 50 mL of 1 mol / lzn (NO3) 2 solution was added to a 200 ml of beaker, and 50 ml of 2 mol / l NaOH solution was added while stirring. Stay for a day. The resulting precipitate was filtered, washed, and dried in an oven at 80 ° C. The dry precipitate was placed in a muffle furnace for 3 h. The ZnO nanoparticles can be obtained after cooling.

[0038](2) Preparation of Ag / ZnO: Ag nanoparticle is uniformly dispersed by physical vapor deposition on the ZnO nanoparticles made of step (1), forming Ag / ZnO composite nanoparticles, physical vapor deposition, first vacuum 0.05 ppa, and maintain a vacuum no less than 0.1 Pa, ZnO and Ag mass ratio 20: 1;

[0039] (3) Ag / ZnO complex nanoparticles prepared by step (2) and mixed with coconut shell and polyethylene, wherein Ag / ZnO complex nanoparticles, coconut reactive carbo...

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Abstract

The invention discloses a preparation method of Ag / ZnO composite material capable of degrading formaldehyde. The preparation method comprises the following steps: (1) preparing ZnO nanoparticles; and (2) preparing Ag / ZnO, namely, uniformly dispersing Ag nanoparticles on the ZnO nanoparticles obtained in step (1) by physical vapor deposition so as to obtain the Ag / ZnO composite nanoparticles. The method further comprises the step (3) of mixing the Ag / ZnO composite nanoparticles prepared in step (2), coconut shell activated carbon and polyethylene, and then sintering to obtain sintered activated carbon particles rich in Ag / ZnO nanoparticles. The surface plasma resonance effect of the Ag / ZnO composite material in visible light under silver nanoparticles breaks the technical bottleneck that an existing product can realize photocatalysis effect under ultraviolet light; the Ag / ZnO composite material has a good photocatalysis effect, and is simple and efficient.

Description

Technical field [0001] The present application relates to a method of preparing a photocatalyst, and more particularly to a method of preparing an Ag / ZnO composite of formaldehyde. Background technique [0002] Photocatalytic technology TiO titanium dioxide in semiconductor nanomaterials 2 For the representative, use natural light to catalyze the decomposition of bacteria and contaminants, high catalytic activity, good chemical stability and thermal stability, no secondary pollution, no irritability, safe and non-toxic, etc., and can be used for a long time The natural environment is one of the most developed green environmental catalysts. [0003] Zinc oxide ZnO is a new type of wide-bandwidth, high excitable semiconductor material, and special electronic structures make it excellent electrical, magnetic, and optical equivalents. Zinc oxide is compared with the titanium dioxide, but the zinc oxide production process is simple, the cost is low, so it is a photocatalytic semicon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/60B01D53/86B01D53/72
CPCB01D53/007B01D53/8668B01D2258/06B01J23/60B01J35/004
Inventor 马林
Owner 苏州湘淮环境科技有限公司
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