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Preparation method of double-metal doped titanium dioxide polyhedral photocatalyst

A kind of titanium dioxide, photocatalyst technology

Inactive Publication Date: 2016-06-01
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The photosensitive wavelength of a single titanium dioxide nanomaterial is generally in the ultraviolet region, and it is not easy to disperse and easily interact with each other to reduce the photocatalytic activity, which is not conducive to practical application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1 FeCo-NTiO 2 preparation of

[0017] First, take 0.8mmol iron salt, 0.8mmol cobalt salt and 1mmol ammonium salt and add them to 5mL tetrabutyl titanate. During stirring, slowly add 0.5mL hydrofluoric acid, react in the reactor at 160°C for 24 hours, cool After reaching room temperature, centrifuge and wash with ultrapure water and absolute ethanol three times, then vacuum-dry at 50°C; then, put the ground powder into a muffle furnace with a heating rate of 1°C / min, and calcinate at 480°C for 60min ; Finally, the calcined powder is cooled to room temperature to obtain FeCo-NTiO 2 ;

[0018] Described iron salt is ferric sulfate;

[0019] Described cobalt salt is cobalt sulfate;

[0020] Described ammonium salt is ammonium sulfate.

Embodiment 2

[0021] Example 2 FeCo-NTiO 2 preparation of

[0022] First, take 0.8mmol iron salt, 1.0mmol cobalt salt and 1mmol ammonium salt and add them to 5mL tetrabutyl titanate. During the stirring process, slowly add 0.65mL hydrofluoric acid, react in the reactor at 180°C for 21 hours, and cool After reaching room temperature, centrifuge and wash three times with ultrapure water and absolute ethanol, then vacuum-dry at 50°C; then, put the ground powder into a muffle furnace with a heating rate of 2°C / min, and calcinate at 520°C for 30min ; Finally, the calcined powder is cooled to room temperature to obtain FeCo-NTiO 2 ;

[0023] Described iron salt is ferric chloride;

[0024] Described cobalt salt is cobalt chloride;

[0025] Described ammonium salt is ammonium chloride.

Embodiment 3

[0026] Example 3 FeCo-NTiO 2 preparation of

[0027] First, add 0.8mmol iron salt, 1.2mmol cobalt salt and 1mmol ammonium salt to 5mL tetrabutyl titanate. During stirring, slowly add 0.8mL hydrofluoric acid, react in the reactor at 200°C for 18 hours, cool After reaching room temperature, centrifuge and wash three times with ultrapure water and absolute ethanol, and then vacuum-dry at 50°C; then, put the ground powder into a muffle furnace with a heating rate of 3°C / min, and calcinate at 560°C for 10 min ; Finally, the calcined powder is cooled to room temperature to obtain FeCo-NTiO 2 ;

[0028] Described iron salt is ferric nitrate;

[0029] Described cobalt salt is cobalt nitrate;

[0030] Described ammonium salt is ammonium nitrate.

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Abstract

The invention discloses a preparation method of a double-metal doped titanium dioxide polyhedral photocatalyst free of doped precious metals, low in cost, simple to prepare and high in photocatalytic activity and belongs to the technical fields of novel nano functional materials and green energy.The double-metal doped titanium dioxide polyhedral photocatalyst prepared by means of the preparation method is iron and cobalt double-metal in-situ compounded and nitrogen doped titanium dioxide nanosheets FeCo-N@TiO2 and has good photocatalytic activity.

Description

technical field [0001] The invention relates to a preparation method of a double-metal doped titanium dioxide polyhedron photocatalyst. It belongs to the field of new nano functional materials and green energy technology. Background technique [0002] Photocatalyst, also known as photocatalyst, is a substance that does not change itself under the irradiation of light, but can promote chemical reactions. Photocatalyst converts the light energy existing in nature into the energy required for chemical reactions to produce catalysis, so that the surrounding oxygen and water molecules are excited into free negative ions with great oxidative power. It can decompose almost all organic substances and some inorganic substances that are harmful to the human body and the environment. It can not only accelerate the reaction, but also use the definition of nature to avoid waste of resources and additional pollution. There are many materials that can be used as photocatalysts in the wor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J27/24B01J35/02B01J35/00
CPCB01J23/75B01J27/24B01J35/00B01J35/30B01J35/39
Inventor 张勇庞雪辉李燕王晓东魏琴
Owner UNIV OF JINAN
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