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A kind of porous silica gel particles loaded with graphitic phase carbon nitride, paper with same and preparation method thereof

A technology of porous silica and graphitic carbon nitride, which is applied in chemical instruments and methods, catalyst activation/preparation, separation methods, etc., can solve the problems such as the inability of formaldehyde molecules to emit, the poor effect of removing formaldehyde, and the overflow of formaldehyde molecules. , to achieve the effects of cheap raw materials, mild preparation conditions and uniform pore distribution

Active Publication Date: 2022-03-15
西安极数天工软件技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the poor air permeability of traditional wallpaper, it is used as a skeleton carrier to disperse g-C 3 N 4 Not only can the overflowing formaldehyde molecules pass through the wallpaper and g-C smoothly 3 N 4 reaction, because the pore structure is blocked by the catalyst, the formaldehyde molecules cannot be released for a long time, and formaldehyde molecules still overflow for several years or even longer
Due to its good pore structure and mechanical strength, the sponge can be used as a good carrier to evenly disperse g-C 3 N 4 Degradation of formaldehyde, but because the pore structure in the sponge is too large and the pore size is too large, most of the formaldehyde molecules are not absorbed by the catalyst when they overflow, and are directly emitted to the room, and the formaldehyde removal effect is not good

Method used

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  • A kind of porous silica gel particles loaded with graphitic phase carbon nitride, paper with same and preparation method thereof
  • A kind of porous silica gel particles loaded with graphitic phase carbon nitride, paper with same and preparation method thereof
  • A kind of porous silica gel particles loaded with graphitic phase carbon nitride, paper with same and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] At room temperature, take 100mL tetraethyl orthosilicate aqueous solution and disperse it in absolute ethanol, stir for 30min to fully hydrolyze, then add 0.2g of g-C 3 N 4 , after stirring evenly, drop by drop the concentration less than 1mol L -1 The ammonia water was continuously stirred for 1h until the solution became viscous, then stood and aged, and after replacing the absolute ethanol in the system with deionized water for many times, the deionized water was poured out to obtain SiO 2 / g -C 3 N 4 gel system. SiO 2 / g -C 3 N 4 The gel system was frozen into a solid within 1 min, freeze-dried for 20 h, then calcined in a muffle furnace at 550°C for 2 h, and cooled naturally to room temperature to obtain porous silica gel particles loaded with graphite phase carbon nitride.

[0047] The obtained porous silica gel particles loaded with graphite phase carbon nitride were sieved to screen out silica microspheres with a particle size of 50 μm and ensure uniform ...

Embodiment 2

[0049] At room temperature, take 100mL tetraethyl orthosilicate aqueous solution and disperse it in absolute ethanol, stir for 30min to fully hydrolyze, then add 0.4g of g-C 3 N 4 , after stirring evenly, drop by drop the concentration less than 1mol L -1 The ammonia water was continuously stirred for 1h until the solution became viscous, then left to stand and aged, and methanol was used to replace the absolute ethanol and water in the system several times, then the methanol was poured off to obtain SiO 2 / g -C 3 N 4 gel system. SiO 2 / g -C 3 N 4 The gel system was frozen into a solid within 1 min, freeze-dried for 21 h, then calcined in a muffle furnace at 550°C for 2 h, and cooled naturally to room temperature to obtain porous silica gel particles loaded with graphite phase carbon nitride.

[0050] The obtained porous silica gel particles loaded with graphite phase carbon nitride were sieved to screen out silica microspheres with a particle size of 50 μm and ensure u...

Embodiment 3

[0052] At room temperature, take 100mL tetraethyl orthosilicate aqueous solution and disperse it in absolute ethanol, stir for 30min to fully hydrolyze, then add 0.6g of g-C 3 N 4 , after stirring evenly, drop by drop the concentration less than 1mol L -1 The ammonia water was continuously stirred for 1h until the solution became viscous, then stood and aged, and after replacing the absolute ethanol in the system with deionized water for many times, the deionized water was poured out to obtain SiO 2 / g -C 3 N 4 gel system. SiO 2 / g -C 3 N 4 The gel system was frozen into a solid within 1 min, freeze-dried for 22 h, then calcined in a muffle furnace at 550°C for 2 h, and cooled naturally to room temperature to obtain porous silica gel particles loaded with graphitic carbon nitride.

[0053] The obtained porous silica gel particles loaded with graphite phase carbon nitride were sieved to screen out silica microspheres with a particle size of 50 μm and ensure uniform mass ...

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Abstract

The invention discloses a porous silicon dioxide gel particle loaded with graphite phase carbon nitride, paper with the same and a preparation method thereof, belonging to the technical field of environmental catalysis. Using the sol-gel method to mix the tetraethyl orthosilicate aqueous solution with g-C 3 N 4 Mixing to prepare porous silica gel particles loaded with graphite phase carbon nitride, which has a large specific surface area, controllable pore structure size, and controllable additive particle size. The preparation conditions are mild, the process is simple, the raw materials are cheap, and the reproducibility is good, and the prepared material has good photocatalytic performance. When it is added to the decorative material, the catalytic efficiency of the photocatalytic material can be improved, and the research scope of the photocatalytic material is broadened.

Description

technical field [0001] The invention belongs to the technical field of environmental catalysis, and in particular relates to a porous silicon dioxide gel particle loaded with graphite phase carbon nitride, paper with the same and a preparation method thereof. Background technique [0002] Environmental pollution has become a major problem that our country and the world need to face. Formaldehyde is a colorless gas with a strong pungent smell. Its 37% aqueous solution is called formalin. It is commonly used in medical and scientific research departments. Preservation of specimens. In order to prevent corrosion of interior decoration materials and furniture, wood is also commonly soaked in formaldehyde solution before processing to prevent corrosion and damage by wood borers. The boiling point of formaldehyde is 19.5°C, and it is very volatile at room temperature, and the volatilization speed is accelerated as the temperature rises. It ranks second in my country's priority l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/08B01J37/03B01D53/86B01D53/72D21H17/68D21H21/14D21H27/18
CPCB01J27/24B01J37/08B01J37/036B01D53/8668D21H17/68D21H21/14D21H27/18B01D2258/06B01J35/39
Inventor 马永宁段仪豪王蒙费贵强王海花李小龙杨雨豪韩玉英
Owner 西安极数天工软件技术有限公司
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