Renewable high-efficiency formaldehyde removal material and preparation method thereof

A formaldehyde removal and high-efficiency technology, applied in separation methods, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as desorption, secondary pollution, limiting material reaction efficiency, etc., to promote catalytic reaction activity, no irritating odor , the effect of improving conversion efficiency

Inactive Publication Date: 2017-10-10
XIAN LOW CARBON ENERGY SAVING TECH SERVICECO +2
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Problems solved by technology

Although free formaldehyde in the air can be adsorbed, desorption will occur after the adsorption is saturated, and it does not have the characteristics of long-term cure
Some formaldehyde scavengers have good scavenging effects, such as CN 102500224 A, etc. They have prepared formaldehyde scavengers in the form of adsorption materials combined with oxidizing agents or reducing agents. Although formaldehyde pollution can be eliminated, other chemical substances produced after the reaction are likely to cause Secondary pollution of the environment
Although some formal

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  • Renewable high-efficiency formaldehyde removal material and preparation method thereof
  • Renewable high-efficiency formaldehyde removal material and preparation method thereof

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preparation example Construction

[0022] The renewable high-efficiency formaldehyde removal material involved in the present invention mainly includes ultra-thin manganese dioxide nanosheets in δ crystal form, modified sepiolite and molybdenum carbide nanoparticles, and is an environmentally friendly and non-toxic powder catalytic material. The preparation method comprises the following steps:

[0023] Step 1: Mix 3-5 mL of tetramethylammonium hydroxide (TMA OH) with 2-4 mL of 30% H 2 o 2 The solutions were mixed to obtain solution A;

[0024] Step 2: Dissolving 50-65 g of manganese chloride tetrahydrate in 25 mL of ultrapure water to prepare solution B;

[0025] Step 3: Add solution A to solution B dropwise, and apply strong stirring during the addition and mixing process; then, ultrasonically disperse for 3-5 minutes, and continue stirring at room temperature for 80 minutes to obtain dark brown ultrathin MnO 2 Colloidal suspension of nanosheets;

[0026] Step 4: modifying the purified sepiolite by ion e...

Embodiment

[0031] Mix 3 mL of tetramethylammonium hydroxide (TMA·OH) with 4 mL of 30% HO 2 o 2 Mix to make Solution A. Solution B was prepared by dissolving 56 g of manganese chloride tetrahydrate in 25 mL of ultrapure water. Add solution A to solution B dropwise, and apply vigorous stirring during the addition and mixing process. Subsequently, ultrasonic dispersion was performed for 5 min, and stirring was continued for 80 min at room temperature to obtain ultrathin MnO 2 Colloidal suspension of nanosheets. Dissolve alkaline sepiolite and nano-molybdenum carbide (MoC) in a solution with a volume ratio of ethanol and water (1:9), and add MnO 2 Colloidal suspension, the control temperature is 80 ℃, stirred and reacted for 8 h, the obtained reaction solution is centrifuged, and the obtained precipitate is dried at a control temperature of 110 ℃, and the ultra-thin MnO loaded 2 High-efficiency formaldehyde-scavenging materials of nanosheets.

[0032] Inject the air above the formaldeh...

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Abstract

The invention relates to a renewable high-efficiency formaldehyde removal material and a preparation method thereof. The preparation method comprises the following steps of mixing tetramethylammonium hydroxide with a H2O2 solution to make a solution A; dissolving manganese chloride tetrahydrate in ultrapure water to make a solution B; dropwise adding the solution A into the solution B, then ultrasonically dispersing, and agitating to obtain nigger-brown ultrathin MnO2 nanosheet colloidal turbid liquid; dissolving alkaline sepiolite and nano molybdenum carbide in a solution of ethanol and water, dropwise adding the ultrathin MnO2 nanosheet colloidal turbid liquid, centrifugally separating reaction liquid, and drying, so that the high-efficiency formaldehyde removal material loaded with an ultrathin MnO2 nanosheet is obtained. The reaction, of the renewable high-efficiency formaldehyde removal material, of catalytically oxidizing formaldehyde can be carried out at room temperature, is excellent in recycling performance, is an environment-friendly and nontoxic powdery catalyst, can be used for effectively removing the formaldehyde released from various house furnishing materials and free formaldehyde in air, and is thoroughly free from secondary pollution; thus, obsession and threat which are brought by the formaldehyde in a living environment to the normal life of people are guaranteed to remove.

Description

technical field [0001] The invention belongs to the technical field of formaldehyde catalysis, and in particular relates to a renewable high-efficiency formaldehyde removal material and a preparation method thereof. Background technique [0002] Formaldehyde is one of the most serious indoor pollutants, ranking second on my country's priority list of toxic chemicals, and has been identified as a carcinogenic and teratogenic substance by the World Health Organization. Formaldehyde can combine with the amino group in human protein to denature the protein and cause harm to the human body. Formaldehyde can harm the human body in many ways, and high-concentration formaldehyde is also toxic to the nervous system, immune system, and liver. Studies have shown that the problem of excessive free formaldehyde in wood-based panels is still quite serious. The emission of free formaldehyde in wood-based panels is one of the important sources of formaldehyde pollution in indoor air. The...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/72B01J20/10B01J27/22
Inventor 孙晋蒙王荣荣随魁亭刘峰高航
Owner XIAN LOW CARBON ENERGY SAVING TECH SERVICECO
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