Nano-fiber membrane material capable of decomposing formaldehyde at normal temperature, and preparation method and application of same

A nanofiber membrane and formaldehyde technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve problems such as catalyst loss, catalyst agglomeration, and large air resistance, and achieve long service life, high catalytic performance, and satisfaction The effect of industry requirements

Active Publication Date: 2018-12-18
广州华园科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalytic material prepared by this method is in the form of powder, and direct use will generate large air resistance, which will easily cause the loss of the catalyst, and easily cause the powder catalyst to agglomerate.

Method used

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  • Nano-fiber membrane material capable of decomposing formaldehyde at normal temperature, and preparation method and application of same
  • Nano-fiber membrane material capable of decomposing formaldehyde at normal temperature, and preparation method and application of same
  • Nano-fiber membrane material capable of decomposing formaldehyde at normal temperature, and preparation method and application of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Weigh 1.975gCo(NO 3 ) 2 ·6H 2 O, 1.704gMn(NO 3 ) 2 4H 2 O and 0.417g of isonicotinic acid were placed in a stainless steel ball milling jar, four stainless steel ball milling beads with a diameter of 10mm were added, put into a high-speed vibrating ball mill, and ball milled at 1000r / min for 20min to obtain a solid powder. The powder was soaked in DMF solution at 50°C for 24h, the solution was changed every 6h, centrifuged at 10000r / min for 5min, and the lower layer product was vacuum-dried at 80°C for 24h to obtain Mn / Co-MOFs.

[0046] (2) The MOFs material obtained above was put into a muffle furnace and calcined at 350°C for 2.5h to prepare the Mn-Co-1 catalyst.

[0047] Carry out XPS analysis to the catalyst synthesized by the present embodiment, its result is as follows figure 1 As shown, it can be seen from the figure that the catalyst contains Mn, Co, O, and C elements, which proves that Mn, Co elements are successfully embedded in the catalyst, C is a ...

Embodiment 2

[0049] (1) Weigh 0.881g CoCO 3 , 1.704gMnCO 3 and 1.334g of oxalic acid were placed in a stainless steel ball milling jar, four stainless steel ball milling beads with a diameter of 9mm were added, put into a high-speed vibrating ball mill, and ball milled for 20min at a speed of 1000r / min to obtain a solid powder. The powder was soaked in DMF solution at 50°C for 24h, the solution was changed every 6h, centrifuged at 10000r / min for 5min, and the lower layer product was vacuum-dried at 80°C for 24h to obtain Mn / Co-MOFs.

[0050] (2) Put the MOFs material obtained above into a muffle furnace for 2.5 h at 350° C. to prepare the Mn-Co-2 catalyst. The XPS spectrum and figure 1 Similarly, it shows that the catalyst contains Mn, Co, O, and C elements. It proves that Mn, Co elements are successfully embedded in the catalyst, and C is a small amount. The modified carbonization temperature is not enough for metal ions to react with C. Therefore, it is proved that Mn, Co, O is based o...

Embodiment 3

[0052] (1) Weigh 4.294gCoSO 4 ·7H 2 O, 1.704gMnSO 4 4H 2 0 and 3.210g of trimesic acid were placed in a stainless steel ball milling jar, four stainless steel ball milling beads with a diameter of 8mm were added, put into a high-speed vibrating ball mill, and ball milled for 20min at a speed of 1000r / min to obtain a solid powder. The powder was soaked in DMF solution at 50°C for 24h, the solution was changed every 6h, centrifuged at 10000r / min for 5min, and the lower layer product was vacuum-dried at 80°C for 24h to obtain Mn / Co-MOFs.

[0053] (2) Put the MOFs material obtained above into a muffle furnace for 2.5 h at 350 ° C to prepare the Mn-Co-3 catalyst, the XPS spectrum and figure 1 Similarly, it shows that the catalyst contains Mn, Co, O, and C elements. It proves that Mn, Co elements are successfully embedded in the catalyst, and C is a small amount. The modified carbonization temperature is not enough for metal ions to react with C. Therefore, it is proved that Mn, ...

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Abstract

The invention belongs to the technical field of removal of formaldehyde and discloses a nano-fiber membrane material capable of decomposing formaldehyde at normal temperature, and a preparation methodand an application of same. With carbonized MOFs being a formaldehyde catalyst, the material, compared with a conventional transition metal oxide, is large in specific surface area and high in porosity and has advantage of uniform dispersion of metal active components; compared with a conventional powdery formaldehyde catalyst, by using the nano-fiber membrane as a catalyst supporter, the productis uniform in catalyst particle distribution and is low in wind drag, so that the product is high in catalytic performance on the formaldehyde and also is long in service life. The room-temperature formaldehyde catalyst in the invention has excellent catalytic oxidization activity; compared with a formaldehyde catalyst in the prior art, at 25 DEG C, the product in the invention can reach more than 95% in catalytic conversion rate of the formaldehyde; after operation for 800 hours, the catalytic activity is not reduced, so that the product can satisfy present industrial demands better.

Description

technical field [0001] The invention belongs to the technical field of formaldehyde removal, and in particular relates to a nanofiber membrane material capable of decomposing formaldehyde at room temperature, a preparation method and application thereof. Background technique [0002] Formaldehyde is an important global economic chemical, which is widely used in construction, wood processing, textiles, furniture, carpets and other chemical industries, and has entered people's indoor life with the development of social economy. However, due to the high toxicity of formaldehyde, long-term exposure can lead to chronic poisoning, causing diseases such as nasopharyngeal cancer and even leukemia. One of the most harmful pollutants. At present, formaldehyde pollution is affecting millions of people. Therefore, it is of great practical significance to study the elimination of formaldehyde, which is harmful to the health of modern humans. [0003] Catalytic oxidation technology is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01J31/22B01D53/72
CPCB01D53/8668B01J31/2239B01J31/2243
Inventor 夏启斌赵长多刘宝玉许锋
Owner 广州华园科技有限公司
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