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A kind of preparation method of silicon oxide/carbon composite structure microsphere

A silicon oxide and carbon composite technology, applied in the field of nanomaterials, can solve the problems of complex preparation process and fragile spheres, and achieve the effects of simplified preparation process, good monodispersity and high mechanical strength

Active Publication Date: 2021-10-12
ANHUI ESTONE MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing silicon oxide / carbon composite structure microspheres, using trimethoxyphenylsilane (PTMS) and tetraethyl orthosilicate (TEOS) as silicon sources, and first preparing a compound containing Silica spheres of phenyl groups, and carbonization of phenyl groups at high temperature in an inert atmosphere to obtain SiO with a particle size of 0.5-1.5 μm 2 / C composite structure microspheres, which solve the problems of complex preparation process and fragile spheres in the past

Method used

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  • A kind of preparation method of silicon oxide/carbon composite structure microsphere
  • A kind of preparation method of silicon oxide/carbon composite structure microsphere
  • A kind of preparation method of silicon oxide/carbon composite structure microsphere

Examples

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Embodiment 1

[0036] (1) Using a magnetic stirring water bath, at a speed of 1200rpm, at 40°C, mix 100mL methanol and 100mL deionized water to obtain a mixed solution 1, and mix 4.00g PTMS and 6.00g TEOS to obtain a mixed solution 2. 20 mL of ammonia water was added to the liquid 1 to obtain the mixed liquid 3, and the mixed liquid 2 was added to the mixed liquid 3, and the stirring was continued for 7 hours to obtain the phenyl-containing silica sol.

[0037] (2) The phenyl-containing silica sol prepared above was centrifuged and washed three times with absolute ethanol at a speed of 9000 rpm, and then the centrifuged product was placed in an oven and dried at 100° C. for 10 h to obtain a white powder containing Phenyl silica.

[0038] (3) Put the above-prepared phenyl-containing silicon oxide in a tube furnace, raise the temperature to 750°C, the heating rate is 5°C / min, and keep it warm for 6h to obtain SiO 2 / C composite structure microspheres.

[0039] figure 1 SiO prepared for Exam...

Embodiment 2

[0041] The specific operation steps of Example 2 are the same as those of Example 1, except that in step (1) of Example 2, PTMS is 3.00 g, and TEOS is 7.00 g.

[0042] figure 2 SiO prepared for Example 2 of the present invention 2 / C composite structure microspheres scanning electron micrograph, by figure 2 It can be seen that the sample is spherical, the particle size is monodisperse, and the average particle size is 1.5 μm.

Embodiment 3

[0044] The specific operation steps of embodiment 3 are the same as embodiment 1, the difference is that the volume of ammonia water in the step (1) of embodiment 3 is 14mL.

[0045] image 3 SiO prepared for Example 3 of the present invention 2 / C composite structure microspheres scanning electron micrograph, by image 3 It can be seen that the sample is spherical, the particle size is monodisperse, and the average particle size is 0.516 μm.

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Abstract

The invention discloses a preparation method of silicon oxide / carbon composite structure microspheres, and relates to the technical field of nanomaterials. The invention directly uses organic carbon in a silicon source as a carbon source, and saves the step of adding other organic substances as a carbon source. The preparation process is simplified, and the corresponding material cost is saved; compared with the core-shell structure silicon oxide / carbon composite microspheres, the mechanical strength is higher, and it is not easy to break. ℃, carbonization for more than 10h, the product still maintains a good spherical morphology.

Description

Technical field: [0001] The invention relates to the technical field of nanometer materials, in particular to a method for preparing silicon oxide / carbon composite structure microspheres. Background technique: [0002] At present, the closest prior art: preparation of single-phase carbon spheres, single-phase silica spheres, and core-shell structure carbon / silica composite spheres. Single-phase carbon spheres or silicon oxide spheres cannot be widely used due to their single performance. The preparation of core-shell structure carbon / silica composite spheres usually requires the addition of organic substances such as surfactants and formaldehyde, which makes the preparation process complicated, and the thickness of the shell layer is limited. broken. [0003] In view of this, the present invention proposes a SiO that does not require exogenous organic substances such as surfactants and formaldehyde as a carbon source. 2 The preparation method of the / C composite structure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02
CPCB01J13/02
Inventor 马珍珍蒋学鑫王韶晖张轲轲
Owner ANHUI ESTONE MATERIAL TECH CO LTD