Silicon oxide and titanium oxide composite material and synthesis method thereof

A technology for composite materials and synthesis methods, which is applied in the field of silicon oxide-containing composite materials and their synthesis, can solve problems such as high cost and complicated preparation methods, and achieve the effect of not being damaged easily and the synthesis method is simple and easy

Pending 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 titanium oxide composite material and synthesis method thereof
  • Silicon oxide and titanium oxide composite material and synthesis method thereof
  • Silicon oxide and titanium oxide composite material and synthesis method thereof

Examples

Experimental program
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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 A and B solutions to obtain a buffer solution.

[0048] 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.

[0049] 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

[0052] Take 1g of urea, 4g of hexadecyltrimethylammonium bromide, and 100mL of distilled water and mix evenly, then add 3g of titanium sulfate, and stir for 1h; then put it in a reaction kettle and treat it at 140°C for 20h; then wash the solid product with distilled water for 4 Secondary to neutral, dry at 120°C for 12 hours to obtain titanium oxide;

[0053] Take 1.87g of the above-mentioned titanium oxide in 65mL of ethanol and stir for 0.5h, then ultrasonic treatment for 3h, the frequency of ultrasonic wave is 1MHz, and the power is 50W / L according to the volume of the solution; then put it in a water bath at 58°C, add 50mL of pH4. 8 buffer solution, add 1.35 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 26...

Embodiment 3

[0055] Take 0.6g of urea, 7.4g of cetyltrimethylammonium bromide, and 45mL of distilled water and mix evenly, then add 3g of titanium sulfate, stir for 0.2h; Wash with distilled water 4 times until neutral, and dry at 120°C for 12 hours to obtain titanium oxide;

[0056] Take 2g of the above-mentioned titanium oxide in 20mL of ethanol and stir for 0.2h, then ultrasonic treatment for 2h, the frequency of ultrasonic wave is 15KHz, the power is 100W / L according to the volume of the solution; Buffer solution, add 0.36mL tetraethyl orthosilicate dropwise under the stirring condition of 280 rpm; after the dropwise addition, stir at the speed of 50 rpm for 2h, then place it in a water bath at 25°C for 6h; The obtained 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 / titanium oxide composite material, the obtained sample number is CL2, and the properties of the sample are shown in Table 1.

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Abstract

The invention discloses a silicon oxide and titanium oxide composite material and a synthesis method thereof. The composite material takes titanium oxide as a core layer and silicon oxide as a shell layer. The synthesis method comprises the following steps: mixing titanium oxide with an alcohol solvent, adding a buffer solution and a silicon source, stirring, standing, washing, drying, and finallycarrying out a heat treatment to obtain the silicon oxide/titanium oxide composite material. The provided silicon oxide/titanium oxide composite material has a core-shell structure, the shell coatingis 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): B01J21/08B01J35/10
CPCB01J21/08B01J23/002B01J35/004B01J35/1061B01J35/1014B01J35/0073
Inventor 范峰凌凤香张会成王少军杨春雁
Owner CHINA PETROLEUM & CHEM CORP
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