Preparation method for functional foam carbon for photocatalytically degrading formaldehyde

A technology of photocatalysis and foamed carbon, which is applied in the direction of coating, etc., can solve the problems of dust pollution and difficult forming of activated carbon

Inactive Publication Date: 2017-05-31
SHAANXI SHENGMAI PETROLEUM
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] However, traditional activated carbon is not easy to shape, and it is easy to cause dust pollution, so there are still some defects in the functional carbon materials used for synthetic indoor VOCs purification

Method used

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Experimental program
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Embodiment Construction

[0016] A preparation method for photocatalytically degrading formaldehyde functional foam carbon, comprising the steps of:

[0017] (1) Preparation of polyurethane foam carbon

[0018] AC raw Put it into a glass mold, add polyether, hard foam silicone oil, water, pentamethyldiethylenetriamine, dichlorofluoroethane, and cycloethylamine, mix evenly in the mold, and stir at a speed of 500-600 r / min After 1 min, diphenylmethane diisocyanate was added, vigorously stirred at a speed of 1000 r / min for 45 s to make it foam freely, aged at room temperature for 24 h, and then placed in a muffle furnace to raise the temperature to 350 °C at 5 °C / min Carbonize 1 h to make polyurethane foam carbon;

[0019] (2) Preparation of functional foam carbon for photocatalytic degradation of formaldehyde

[0020] Prepare 50 mL of TiO with a mass fraction of 1% 2 Solution, sonicated under weak ultrasonic waves for 15 min to make it evenly mixed; the prepared polyurethane foam carbon was added to ...

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Abstract

The invention relates to a preparation method for a functional foam carbon for photocatalytically degrading formaldehyde. The preparation method for the functional foam carbon for photocatalytically degrading formaldehyde includes the following steps: (1) preparation of polyurethane foam carbon; (2) preparation of the functional foam carbon for photocatalytically degrading formaldehyde. The prepared polyurethane foam carbon shows a developed reticular structure, and polyurethane and active carbon are tightly combined. Supported TiO2 is mainly distributed on the pore surface of the foam carbon. The removal of formaldehyde by the TiO2-supported functional foam carbon is shown as the synergism between adsorption and photocatalytic degradation, the rich foam-like pore structure provides a large number of attachment points for formaldehyde gas, TiO2 photocatalytically degrades the formaldehyde gas into small molecules under radiation by ultraviolet light, and a high added active carbon amount and a doped TiO2 amount are both favorable for the removal of the formaldehyde gas. When the added active carbon amount is 35 percent and the doped TiO2 amount is 2 percent, the photocatalytic degradation rate is highest, reaching 85.3 percent.

Description

technical field [0001] The invention relates to a preparation method for photocatalytically degrading formaldehyde functional foam carbon. Background technique [0002] Formaldehyde is a highly toxic gas. Building materials for interior decoration, composite panels, furniture, paints, paints, textiles, etc. will release formaldehyde during use, and the longest release period can reach more than ten years. When the indoor formaldehyde content is 0.1 mg / m 3 When inhaling high concentrations of formaldehyde, it can cause respiratory and bronchial diseases; long-term exposure to low-dose formaldehyde can cause chronic poisoning, and severe cases can cause death. Therefore, exploring effective ways to remove indoor formaldehyde is one of the current research hotspots. [0003] A lot of research has been done on the removal of formaldehyde at home and abroad. Among many purification technologies, adsorption and TiO 2 Photocatalysis is currently the most widely used indoor form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08J9/36C08G18/76C08G18/48C08J9/08C08J9/14C08K3/04C08K3/22C08L75/08C08G101/00
CPCC08J9/40C08G18/48C08G18/7671C08G2101/00C08J9/08C08J9/144C08J9/36C08J2203/10C08J2203/142C08J2203/184C08J2375/08C08K3/04C08K3/22C08K2003/2241C08L2203/14
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM
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