Porous carbon material with B-N Lewis acid-base pair structure as well as preparation method and application of porous carbon material

A technology of Lewis acid-base pairs and porous carbon materials, applied in separation methods, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of poor formaldehyde capture ability, poor effect, complex transformation methods, etc., and achieve good application Potential, low equipment requirements, and simple process

Pending Publication Date: 2021-12-21
JIANGXI INST OF RARE EARTHS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] Aiming at the problems in the prior art that the adsorbent has a weak ability to capture formaldehyde, the modification method is complicated and the effect is not good, the present invention proposes a porous carbon material with a B-N Lewis acid-base pair structure and its preparation method and application, which are easy to use Formaldehyde specific adsorbent with B-N Lewis acid-base pair structure obtained by the preparation process

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  • Porous carbon material with B-N Lewis acid-base pair structure as well as preparation method and application of porous carbon material
  • Porous carbon material with B-N Lewis acid-base pair structure as well as preparation method and application of porous carbon material
  • Porous carbon material with B-N Lewis acid-base pair structure as well as preparation method and application of porous carbon material

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preparation example Construction

[0070] In another specific embodiment, the present invention provides a method for preparing a porous carbon material based on a B-N Lewis acid-base pair structure that adsorbs formaldehyde, and the preparation method specifically includes the following steps:

[0071] Melamine, L-cysteine ​​and boric acid are mixed and ground for 5-60min according to the mass ratio of (1-6):(1-4):(0.5-3) to obtain a solid mixture precursor, the solid mixture precursor In a tube furnace, N 2 Under the atmosphere, heat up to 500-700°C at a rate of 2-15°C / min for 1-4h, then heat up to 900-1000°C at a rate of 2-15°C / min for 1-4h, and obtain the obtained A porous carbon material based on B-N Lewis acid-base pair structure for adsorbing formaldehyde is described.

[0072] It should be clear that the adoption of the processes provided by the embodiments of the present invention or the replacement or change of conventional data all fall within the scope of protection and disclosure of the present in...

Embodiment 1

[0074] This embodiment provides a porous carbon material with a B-N Lewis acid-base pair structure, and the BET surface area of ​​the porous carbon material is 860.2m 2 g -1 , the pore diameter range is 1-500nm, and the pore diameter is mainly concentrated at 2.0-5.0nm; the surface B content of the porous carbon material is 32.76at.%, and the N content is 26.09at.%.

[0075] This embodiment also provides a preparation method of the porous carbon material with the B-N Lewis acid-base pair structure, and the preparation method specifically includes the following steps:

[0076] Melamine, L-cysteine ​​and boric acid are mixed according to mass ratio 2:1:1, grind 15min, obtain solid mixture precursor, described solid mixture precursor is in tube furnace, N 2 Under atmosphere, heat up to 600°C at a rate of 10°C / min and calcinate for 2 hours, then heat up to 1000°C at a rate of 10°C / min and calcinate for 2 hours, and then cool down at a rate of 10°C / min to obtain the B-N Lewis acid...

Embodiment 2

[0085] This embodiment provides a porous carbon material with a B-N Lewis acid-base pair structure. The surface B content of the porous carbon material is 28.19 at.%, and the N content is 21.31 at.%.

[0086] This embodiment also provides a preparation method of the porous carbon material with the B-N Lewis acid-base pair structure, and the preparation method specifically includes the following steps:

[0087] Melamine, L-cysteine ​​and boric acid were mixed and ground for 15min according to the mass ratio of 4:2:1 to obtain a solid mixture precursor, and the solid mixture precursor was in a tube furnace, N 2 Under atmosphere, heat up to 600°C at a rate of 10°C / min and calcinate for 2 hours, then heat up to 1000°C at a rate of 10°C / min and calcinate for 2 hours, and then cool down at a rate of 10°C / min to obtain the B-N Lewis acid-based Alkali pair structure to adsorb formaldehyde on porous carbon materials.

[0088] Figure 8 For the X-ray diffraction spectrum of the porous...

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Abstract

The invention provides a porous carbon material with a B-N Lewis acid-base pair structure and a preparation method and application of the porous carbon material. The surface of the porous carbon material is provided with the B-N Lewis acid-base pair structure, and the preparation method comprises the steps that a nitrogen supply source, L-cysteine and a boron supply source are mixed and ground to obtain a solid mixture precursor; and the solid mixture precursor is subjected to two-step calcination to obtain the porous carbon material with the B-N Lewis pair structure. The obtained porous carbon material is used as a formaldehyde adsorbent or a formaldehyde catalytic oxidant substrate. The formaldehyde special-effect adsorbent with B-N Lewis acid-base para-sites, high specific surface area and porous characteristics is obtained through a simple and convenient preparation process, and the formaldehyde special-effect adsorbent has very high removal efficiency on formaldehyde in the living environment and also has good application potential in the fields of rare earth industrial sewage treatment, electro-catalysis and the like.

Description

[0001] The invention belongs to the technical field of gas pollution control, and in particular relates to a porous carbon material with a B-N Lewis acid-base pair structure and a preparation method and application thereof. Background technique [0002] As a typical indoor air pollutant, formaldehyde mainly comes from home decoration materials, home textiles and wooden furniture. Long-term exposure to formaldehyde can cause serious health problems, such as skin irritation, respiratory diseases, and even cancer, which seriously threatens human health. It is of great significance to develop an effective technical method to purify indoor formaldehyde pollution. Although the removal of formaldehyde by adsorption is a relatively inefficient method, it also has its unique advantages, such as cheap and easy-to-obtain adsorbent raw materials, and simple synthesis methods. Therefore, it is of great significance to develop a preparation method that contains abundant adsorption sites fo...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30B01D53/02F24F8/95
CPCB01J20/22B01J20/20B01J20/28054B01D53/02F24F8/95B01D2257/70
Inventor 袁文静石绍渊万印华曹宏斌胡康鞠培海
Owner JIANGXI INST OF RARE EARTHS CHINESE ACAD OF SCI
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