Silicon oxide and calcium oxide composite material and synthesis method thereof

A technology for composite materials and synthesis methods, applied in the field of silicon oxide-containing composite materials and their synthesis, can solve the problems of complex preparation methods and high costs, and achieve the effect of simple and easy synthesis methods

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

AI Technical Summary

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1: Preparation of different pH buffers

[0046] 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.

[0047] 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 AB to obtain buffer solution.

[0048] The configuration of PH5 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 AB to obtain buffer solution.

[0049] The configuration of PH5.2 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 AB to obtain buffer solution.

[0050] The configuration of PH5.6 buffer s...

Embodiment 2

[0052] Dissolve 3.8g of calcium nitrate and 1.8g of sodium hydroxide in 100mL of distilled water, stir for 1 hour and put it in a reaction kettle for 8 hours at 105°C; then wash the solid product with distilled water 4 times until neutral, and dry at 120°C for 12 hours to obtain calcium oxide;

[0053] Then take 2.15g of the above-mentioned calcium oxide and place it in 38 mL of ethanol, stir for 0.5 h, then ultrasonicate for 3 h, the frequency of ultrasonic wave is 1 MHz, and the power is 50 W / L according to the volume of the solution; mL pH4.8 buffer solution, then add 1mL tetraethyl orthosilicate dropwise under the stirring condition of 120 rpm; after the dropwise addition, stir at the speed of 20 rpm for 5h, then place it in a water bath at 30°C 12h; wash the obtained product with distilled water 4 times until neutral, dry at 120°C for 12h, and treat at 260°C for 3h to obtain SiO 2 - Calcium oxide composite material, obtained sample number CL1. From figure 1 It can be se...

Embodiment 3

[0055] Dissolve 4g of calcium nitrate and 0.8g of sodium hydroxide in 40mL of distilled water, stir for 1 hour and put it in a reaction kettle for 5 hours at 120°C; then wash the solid product with distilled water 4 times until neutral, and dry at 120°C for 12 hours to obtain calcium oxide;

[0056] Then take 2 g of the above-mentioned calcium oxide and place it in 20 mL of ethanol, stir for 0.2 h, then ultrasonicate for 2 h, the frequency of the ultrasonic wave is 15KHz, and the power is 100W / L based on the solution volume; pH5.0 buffer solution, then add 0.36 mL tetraethyl 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 Stand still for 6h; wash the obtained product with distilled water 4 times until neutral, dry at 120°C for 12h, and treat at 280°C for 2h to obtain SiO 2 - Calcium oxide composite material, obtained sample number CL2.

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Abstract

The invention discloses a silicon oxide and calcium oxide composite material and a synthesis method thereof. The composite material takes calcium oxide as a core layer and silicon oxide as a shell layer. The synthesis method comprises the following steps: mixing calcium oxide with an alcohol solvent, adding a buffer solution and a silicon source, stirring, standing, washing and drying, and finallycarrying out a heat treatment to obtain the silicon oxide / calcium oxide composite material. The silicon oxide and calcium oxide composite material provided by the invention 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): C01F11/02C01B33/18B82Y30/00B82Y40/00B01J23/02B01J20/10B01J20/28B01J20/30
CPCC01F11/02C01B33/18B82Y30/00B82Y40/00B01J23/02B01J23/002B01J35/008B01J20/103B01J20/28014C01P2004/86C01P2006/12C01P2004/61C01P2004/62C01P2004/64B01J2220/4806
Inventor 王家兴范峰凌凤香张会成王少军
Owner CHINA PETROLEUM & CHEM CORP
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