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Photocatalyst for photocatalytic degradation of formaldehyde and preparation method thereof

A photocatalyst and photocatalysis technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems such as the inability to meet the needs of formaldehyde degradation, and improve the efficiency , Increase the absorption area, the effect of large specific surface area

Inactive Publication Date: 2020-02-14
杭州鼎好新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The photocatalyst of the above patent cannot meet the demand of formaldehyde degradation in daily environment

Method used

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  • Photocatalyst for photocatalytic degradation of formaldehyde and preparation method thereof

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Embodiment 1

[0023] A method for preparing a photocatalyst for photocatalytically degrading formaldehyde, which uses isonicotinoyl hydrazone lanthanum complex, bismuth, and lanthanum co-doped nano-titanium dioxide as the main raw material to form a gel-like structure, which is the photocatalyst described above. A photocatalyst that catalyzes the degradation of formaldehyde; among them, the lanthanum complex of isonicotinoyl hydrazone is prepared by reacting p-aminobenzaldehyde isonicotinoyl hydrazone with lanthanum nitrate, and the preparation method of the gel-like structure is as follows: Add lanthanum complex and 0.5kg bismuth, lanthanum co-doped nano-titanium dioxide into 5kg mass concentration 20% dilute nitric acid, then add 0.0005kg calcium acetate monohydrate, 0.002kg sodium hexametaphosphate, and ultrasonically disperse for 20 minutes to obtain a suspension, then Spray the suspension evenly into 4kg of 25% sodium silicate solution, and finally add 5kg of 20% ammonia water to form a...

Embodiment 2

[0027] A method for preparing a photocatalyst for photocatalytically degrading formaldehyde, which uses isonicotinoyl hydrazone lanthanum complex, bismuth, and lanthanum co-doped nano-titanium dioxide as the main raw material to form a gel-like structure, which is the photocatalyst described above. A photocatalyst that catalyzes the degradation of formaldehyde; among them, the lanthanum complex of isonicotinoyl hydrazone is prepared by reacting p-aminobenzaldehyde isonicotinoyl hydrazone with lanthanum nitrate, and the preparation method of the gel-like structure is as follows: Add lanthanum complex and 0.8kg bismuth, lanthanum co-doped nano-titanium dioxide into 8kg mass concentration 30% dilute nitric acid, then add 0.001kg calcium acetate monohydrate, 0.003kg sodium hexametaphosphate, and ultrasonically disperse for 30 minutes to obtain a suspension, then Spray the suspension evenly into 6kg of 35% sodium silicate solution, and finally add 7kg of 25% ammonia to form a gel-li...

Embodiment 3

[0031]A method for preparing a photocatalyst for photocatalytically degrading formaldehyde, which uses isonicotinoyl hydrazone lanthanum complex, bismuth, and lanthanum co-doped nano-titanium dioxide as the main raw material to form a gel-like structure, which is the photocatalyst described above. A photocatalyst that catalyzes the degradation of formaldehyde; among them, the lanthanum complex of isonicotinoyl hydrazone is prepared by reacting p-aminobenzaldehyde isonicotinoyl hydrazone with lanthanum nitrate, and the preparation method of the gel-like structure is as follows: Add lanthanum complex and 0.5kg bismuth, lanthanum co-doped nano-titanium dioxide into 8kg mass concentration 20% dilute nitric acid, then add 0.001kg calcium acetate monohydrate, 0.002kg sodium hexametaphosphate, and ultrasonically disperse for 30 minutes to obtain a suspension, then Spray the suspension evenly into 4kg of 35% sodium silicate solution, and finally add 5kg of 25% ammonia water to form a g...

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Abstract

The invention provides a preparation method of a photocatalyst for photocatalytic degradation of formaldehyde. According to the preparation method, an isonicotinoyl hydrazone lanthanum complex and bismuth-lanthanum co-doped nano titanium dioxide are used as main raw materials; a gel-like structure is prepared, the specific surface area is large, the light absorption area and the contact area withformaldehyde are increased; it is beneficial to light absorption and formaldehyde adsorption, the efficiency of photocatalytic degradation of formaldehyde is greatly increased, the formaldehyde degradation requirements (effective degradation can be realized no matter the concentration is high or low) in a daily environment can be met, and rapid degradation on formaldehyde in a shorter time can berealized. The preparation method of the gel structure comprises the following steps: adding the isonicotinoyl hydrazone lanthanum complex, and the bismuth-lanthanum co-doped nano titanium dioxide intodilute nitric acid, adding calcium acetate monohydrate and sodium hexametaphosphate, carrying out ultrasonic dispersion to obtain a turbid liquid, uniformly spraying the turbid liquid into a sodium silicate solution, and finally, adding ammonia water through spraying.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a photocatalyst for photocatalytically degrading formaldehyde and a preparation method thereof. Background technique [0002] Both the World Health Organization and the U.S. Environmental Protection Agency list formaldehyde as a potentially dangerous carcinogen and an important environmental pollutant. It is the main source of indoor air pollution and seriously affects people's health. Photocatalyst is a material that can promote chemical reactions under the irradiation of light without changing itself. At present, photocatalysts are used in environmental restoration, clean energy production, carbon modification and chemical synthesis, etc., to achieve sustainable development. ways to solve energy and environmental pollution problems. [0003] Formaldehyde can be decomposed into carbon dioxide and water by photocatalyst, which has the characteristics of low energy consump...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J35/10B01D53/86B01D53/72
CPCB01J31/38B01D53/72B01J35/61B01J35/39
Inventor 李可平
Owner 杭州鼎好新材料有限公司
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