Formaldehyde adsorbent for air purification and preparation method and application thereof

A formaldehyde adsorption and air purification technology, applied in the field of air purification, can solve the problems of insufficient adsorbent treatment capacity and long formaldehyde removal cycle, and achieve the effects of excellent photocatalytic degradation ability, excellent catalytic oxidation ability, and modified adsorption capacity.

Pending Publication Date: 2022-07-15
广州绿固环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] To sum up, although the existing technology can effectively remove formaldehyde through adsorbents combined with oxidants or photocatalysts, the processing capacity of the above-mentioned adsorbents is still not strong enough, and the removal cycle for low-concentration formaldehyde is long, so it is urgent to develop a New formaldehyde adsorbent with excellent removal ability for formaldehyde

Method used

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  • Formaldehyde adsorbent for air purification and preparation method and application thereof
  • Formaldehyde adsorbent for air purification and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A preparation method thereof for a formaldehyde adsorbent for air purification, the preparation method comprises the following steps:

[0037] (1) Preparation of mesoporous carbon

[0038] Dissolve 12 mmol phenol and 36 mmol formaldehyde in 10 mL of 0.6 mol / L sodium hydroxide solution and stir evenly at 60 °C, cool to room temperature, then adjust the solution to neutrality by hydrochloric acid, and then remove moisture under vacuum at 90 °C, Then, the obtained phenolic resin was dissolved in ethanol to prepare a 35wt% phenolic resin ethanol solution; 1 g of P123, 0.3 mmol of manganese nitrate and 0.3 mmol of copper nitrate were dissolved in the mixed solution of phenolic resin, and then evaporated at room temperature and heated at 80°C thermally polymerized under helium, and then heat-treated at this temperature for 20 h to obtain a precursor; the precursor was heated to 800 °C at a heating rate of 6 °C / min under helium gas for calcination and carbonization, and kept f...

Embodiment 2

[0042] A preparation method thereof for a formaldehyde adsorbent for air purification, the preparation method comprises the following steps:

[0043] (1) Preparation of mesoporous carbon

[0044] Dissolve 14 mmol phenol and 56 mmol formaldehyde in 10 mL of 0.7 mol / L potassium hydroxide solution and stir evenly at 70 °C, cool to room temperature, then adjust the solution to neutrality by hydrochloric acid, and then remove moisture under vacuum at 100 °C, Then, the obtained phenolic resin was dissolved in ethanol to prepare a 30wt% phenolic resin ethanol solution; 1 g of F127, 0.4 mmol of manganese chloride and 0.2 mmol of copper acetate were dissolved in the mixed solution of phenolic resin, and then evaporated at room temperature and heated at 90 Thermal polymerization was carried out at ℃, and then heat-treated at this temperature for 16 h to obtain a precursor; the precursor was heated to 850 ℃ at a heating rate of 8 ℃ / min under an inert gas for calcination and carbonization...

Embodiment 3

[0048] A preparation method thereof for a formaldehyde adsorbent for air purification, the preparation method comprises the following steps:

[0049] (1) Preparation of mesoporous carbon

[0050] Dissolve 10 mmol phenol and 20 mmol formaldehyde in 10 mL of 0.5 mol / L sodium hydroxide solution and stir evenly at 50 °C, cool to room temperature, then adjust the solution to neutrality by hydrochloric acid, and then remove moisture under vacuum at 80 °C, Then the obtained phenolic resin was dissolved in ethanol to prepare a 20wt% phenolic resin ethanol solution; 1 g of P123, 0.2 mmol of manganese acetate and 0.4 mmol of copper chloride were dissolved in the mixed solution of phenolic resin, and then evaporated at room temperature and heated at 70 Thermal polymerization was carried out at ℃, and then heat-treated at this temperature for 24 h to obtain a precursor; the precursor was heated to 750 ℃ ​​at a heating rate of 4 ℃ / min under helium gas for calcination and carbonization, and...

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Abstract

The invention belongs to the technical field of air purification, and particularly relates to a formaldehyde adsorbent for air purification and a preparation method and application thereof. The preparation method comprises the following steps: preparing a phenolic resin ethanol solution, performing thermal polymerization and carbonization to obtain mesoporous carbon containing manganese and copper, and then performing oxidation treatment to obtain oxidized mesoporous carbon; the preparation method comprises the following steps: dissolving mesoporous carbon into deionized water, dissolving a cobalt source into the deionized water, adding the oxidized mesoporous carbon, uniformly stirring to obtain a mixture solution, adding 2-methylimidazole, ferric salt and zinc salt into the mixture solution, stirring, filtering, washing, drying, and roasting in an inert atmosphere to obtain the methanol adsorbent. The formaldehyde adsorbent prepared by the invention has excellent adsorption and removal capabilities on formaldehyde, and can oxidize formaldehyde under an illumination condition, so that formaldehyde in air is effectively removed.

Description

technical field [0001] The invention belongs to the technical field of air purification. More specifically, it relates to a formaldehyde adsorbent for air purification and its preparation method and application. Background technique [0002] Air pollution, especially indoor air pollution, has serious harm to human body. It is reported that 60% of human diseases come from air pollution. Interior decoration, the use of daily chemicals and human activities produce a lot of pollutants, such as formaldehyde, benzene series, ammonia, etc. Formaldehyde is a kind of volatile organic compounds. Formaldehyde has a strong stimulating effect on the mucous membranes of the eyes, nose and upper respiratory tract, and can cause allergic asthma and bronchitis. Toxic. Eliminating formaldehyde pollution and purifying indoor air are extremely important to human health. [0003] The current indoor air purification mainly uses filtration and adsorption. Filtration mainly removes suspended s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J23/889B01J35/00B01J37/02B01J37/08B01D53/86B01D53/02B01D53/72B01J20/30
CPCB01J20/20B01D53/02B01D53/8668B01J23/8892B01J35/004B01J37/084B01J37/086B01J37/0207B01D2257/70B01D2255/802
Inventor 胡娟黎世淇
Owner 广州绿固环保科技有限公司
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