Silicon oxide and carbon composite material and synthesis method thereof

A carbon composite material and synthesis method technology, applied in chemical instruments and methods, separation methods, catalyst carriers, etc., can solve the problems of high cost and complicated preparation methods, and achieve uniform distribution of shell layers and accelerate the transfer of substances.

Pending Publication Date: 2020-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In summary, some core-shell structure materials and their preparation methods have been disclosed in the prior art, but the materials obtained by the currently disclosed preparation methods still have some defects, and the preparation methods are relatively complicated and costly

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  • Silicon oxide and carbon composite material and synthesis method thereof
  • Silicon oxide and carbon composite material and synthesis method thereof
  • Silicon oxide and carbon composite material and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1: Preparation of different pH buffers

[0047] Configuration of pH4.5 buffer solution: Take 18g of sodium acetate and 9.8mL of glacial acetic acid, dilute with distilled water to a total volume of 1000mL.

[0048] The configuration of pH4.8 buffer solution: mix 19.96g sodium dihydrogen phosphate and 99.8mL distilled water to form A solution; mix 10.14g citric acid and 101.4mL distilled water to form B solution; mix A and B solutions to obtain a buffer solution.

[0049] The configuration of pH 5.0 buffer solution: mix 20.6g sodium dihydrogen phosphate and 103mL distilled water to form A solution; mix 9.7g citric acid and 97mL distilled water to form B solution; mix A and B solutions to obtain a buffer solution.

[0050] Configuration of pH 5.2 buffer solution: Mix 21.44g sodium dihydrogen phosphate and 107.2mL distilled water to form A solution; mix 9.28g citric acid and 92.8mL distilled water to form B solution; mix A and B solutions to obtain a buffer.

...

Embodiment 2

[0053] Mix 10g of glucose, 8g of formaldehyde, and 200mL of distilled water, stir for 1 hour; then place it in a reaction kettle and treat it at 180°C for 12 hours; then wash the solid product with distilled water for 4 times until neutral, dry it at 120°C for 12 hours, and then treat it in nitrogen at 900°C 5h obtains carbon material;

[0054] Take 2.1g of the above carbon in 45mL of ethanol and stir for 0.5h, then ultrasonic treatment for 3h, the frequency of ultrasonic is 1MHz, and the power is 50W / L based on the volume of the solution; then put it in a water bath at 63°C, add 53.5mL of pH4. 8 buffer solution, add 1 mL tetraethyl orthosilicate dropwise under the stirring condition of 120 rpm, stir at the speed of 20 rpm for 5 h after the dropwise addition, and then place it in a water bath at 30 ° C for 12 h; The obtained product was washed 4 times with distilled water to neutrality, dried at 120°C for 12h, and heat-treated at 260°C for 3h to obtain SiO 2 / carbon composit...

Embodiment 3

[0056] Mix 10g of glucose, 2.4g of formaldehyde, and 400mL of distilled water, stir for 0.2h; then put it in a reaction kettle for 4h at 200°C; then wash the solid product with distilled water 4 times until neutral, dry at 120°C for 12h, and then 1000°C in nitrogen ℃ treatment for 4h to obtain carbon materials;

[0057] Take 2g of the above carbon in 20mL of ethanol and stir for 0.2h, then sonicate for 2h, the frequency of the ultrasonic is 15KHz, the power is 100W / L based on the volume of the solution; then put it in a water bath at 70°C, add 22mL of pH5.0 buffer solution, add 0.4 mL ethyl orthosilicate dropwise under the stirring condition of 280 rpm; after the dropwise addition, stir at the speed of 50 rpm for 2 h, and then place it in a water bath at 25 ° C for 6 h; The product was washed 4 times with distilled water to neutrality, dried at 120°C for 12h, and treated at 280°C for 2h to obtain SiO 2 / carbon composite material, the obtained sample number is CL2, and the pr...

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Abstract

The invention discloses a silicon oxide and carbon composite material and a synthesis method thereof. The composite material takes carbon as a core layer and silicon oxide as a shell layer. The synthesis method comprises the following steps: mixing carbon and an alcohol solvent, adding a buffer solution and a silicon source, stirring, standing, washing, drying, and roasting to obtain the silicon oxide/carbon composite material. The silicon oxide/carbon composite material has a core-shell structure, the shell coating is stable and not easy to fall off, and the synthesis method is simple and feasible.

Description

technical field [0001] The invention belongs to the field of synthesis of porous inorganic materials, in particular to a silicon oxide-containing composite material and a synthesis method thereof. Background technique [0002] A material with a core-shell structure is an important new type of material. Its typical feature is that a certain material is used as the core phase, and a layer of the same or different type of material is grown on the outer surface of the core phase to form a shell layer, forming an egg-like phase. Composite structure in shell form. Because the core-shell material has a unique structure, it has advantages that a single structure material does not have, and has good application prospects in the fields of chemical industry, environmental protection, and optics. However, because of its unique and complex structure, its synthesis is far more difficult than ordinary materials, mainly because its structure is difficult to control, and its structure contr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00C01B32/05B01J20/20B01D15/20
CPCC01B32/05B01J21/18B01J20/20B01J20/103B01D15/20C01P2004/61C01P2004/80
Inventor 范峰凌凤香张会成王少军杨春雁
Owner CHINA PETROLEUM & CHEM CORP
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