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Preparation method of titanium dioxide/nickel oxide double-shell hollow sphere

A titanium dioxide and hollow sphere technology is applied in the field of preparation of titanium dioxide/nickel oxide double-shell hollow spheres, which can solve the problems of inconvenient control of the ratio of titanium dioxide and nickel oxide, inability to meet practical applications, and hollow sphere damage, and improve electron mobility. , good performance, uniform particle size effect

Active Publication Date: 2018-03-16
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, by this method, it is inconvenient to control the ratio of titanium dioxide to nickel oxide, and the obtained hollow spheres are severely damaged and collapsed, which cannot meet practical applications.

Method used

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  • Preparation method of titanium dioxide/nickel oxide double-shell hollow sphere
  • Preparation method of titanium dioxide/nickel oxide double-shell hollow sphere
  • Preparation method of titanium dioxide/nickel oxide double-shell hollow sphere

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preparation example Construction

[0030] As introduced in the background technology, there are certain deficiencies in the prior art titanium dioxide / nickel oxide double-shell hollow spheres and their preparation methods. In order to solve the above technical problems, the present invention proposes a titanium dioxide / nickel oxide double-shell hollow sphere The preparation method comprises the following steps:

[0031] (1) adding tetrabutyl orthosilicate to the mixed solution of ammonia water and absolute ethanol, after heating in a water bath, the product is centrifuged, washed, dried, and ground to obtain spherical silica;

[0032] (2) Add the spherical silica of step (1) into the mixed solution of absolute ethanol, acetonitrile and ammonia water, then add tetra-n-butyl titanate, after stirring, the product is centrifuged, washed, dried and ground , calcined to obtain spherical silica / titania;

[0033] (3) Etching the spherical silicon dioxide / titanium dioxide in step (2) with sodium hydroxide solution, cen...

Embodiment 1

[0057] Put a 100mL three-neck flask in an oil bath, add 4mL distilled water, 8mL ammonia water and 100mL absolute ethanol; after stirring for 2h, add 8mL tetrabutyl orthosilicate dropwise to the mixed solution, and stir for 12h at 40°C . After cooling, the obtained white precipitate solution was centrifuged, and the obtained precipitate was washed repeatedly with distilled water. The obtained precipitate was dried at 40° C. for 12 h to obtain silica nanospheres with a particle diameter of about 280 nm.

[0058] Add 200mg of silicon dioxide to a mixed solution of 50mL of ethanol, 14mL of acetonitrile and 0.4mL of ammonia water. After ultrasonication for 30min, add 0.6mL of tetra-n-butyl titanate dropwise, and stir for 3h. The obtained white precipitate solution was centrifuged, and the obtained precipitate was repeatedly washed with distilled water. The obtained precipitate was dried at 40° C. for 12 h to obtain silica / titania nanospheres. The dried precipitate was ground an...

Embodiment 2

[0062] Put a 100mL three-neck flask in an oil bath, add 4mL distilled water, 8mL ammonia water and 100mL absolute ethanol; after stirring for 2h, add 8mL tetrabutyl orthosilicate dropwise to the mixed solution, and stir for 12h at 40°C . After cooling, the obtained white precipitate solution was centrifuged, and the obtained precipitate was washed repeatedly with distilled water. The obtained precipitate was dried at 40° C. for 12 h to obtain silica nanospheres with a particle diameter of about 280 nm.

[0063] Add 200mg of silicon dioxide to a mixed solution of 50mL of ethanol, 14mL of acetonitrile and 0.4mL of ammonia water. After ultrasonication for 30min, 1.0mL of tetra-n-butyl titanate was added dropwise, and the reaction was stirred for 3h. The obtained white precipitate solution was centrifuged, and the obtained precipitate was repeatedly washed with distilled water. The obtained precipitate was dried at 40° C. for 12 h to obtain silica / titania nanospheres. The dried...

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Abstract

The invention discloses a preparation method of a titanium dioxide / nickel oxide double-shell hollow sphere. The preparation method includes the steps: (1) mixing tetrabutyl orthosilicate, ammonia water and absolute ethyl alcohol, heating mixture and separating, washing, drying and grinding products to obtain spherical silica; (2) mixing the spherical silica, the absolute ethyl alcohol, acetonitrile and the ammonia water, adding tetra-n-butyl titanate and separating, washing, drying, grinding and calcining the products to obtain spherical silica / titanium dioxide; (3) etching the spherical silica / titanium dioxide, centrifuging, washing, drying and grinding the products to obtain a titanium dioxide hollow sphere; (4) mixing the titanium dioxide hollow sphere and nickel nitrate hexahydrate solution, performing hydrothermal reaction and performing suction filtration, washing, drying, grinding and calcining on reacted products to obtain the titanium dioxide / nickel oxide double-shell hollow sphere. The prepared titanium dioxide / nickel oxide double-shell hollow sphere is provided with obvious shells.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial synthesis, and in particular relates to a preparation method of titanium dioxide / nickel oxide double-shell hollow spheres. Background technique [0002] Titanium dioxide, as a promising metal oxide semiconductor material, has attracted extensive attention in many fields. However, the wide band gap, fast recombination of photogenerated electron-hole pairs, and low electron mobility of pure TiO2 seriously hinder the application of TiO2 nanomaterials. In order to solve the above problems, scientific researchers have proposed a concept of constructing nano-heterostructure composites, especially the construction of p-n heterojunction nanocomposites. At the interface of the heterojunction nanocomposite, a built-in electric field is formed, which promotes the separation of the photogenerated carriers of the system, expands the range of its spectral response, and improves the electron mobility. [...

Claims

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Application Information

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IPC IPC(8): B01J13/02B01J13/12B01J23/755B01J35/10B01J35/08
CPCB01J13/02B01J13/12B01J23/002B01J23/755B01J35/51B01J35/61
Inventor 周国伟王海青高婷婷苑再武
Owner QILU UNIV OF TECH
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