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A kind of preparation method of nitrogen-doped titanium dioxide nanosheet photocatalyst

A titanium dioxide, photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of reducing photocatalytic activity, unfavorable practical application, easy mutual influence, etc., to improve photocatalysis The effect of increasing photocatalytic activity and broadening the range of photosensitive wavelengths

Inactive Publication Date: 2018-10-23
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 FeMn-N@TiO 2 preparation of

[0017] First, add 0.8 mmol of iron salt, 0.8 mmol of manganese salt and 1 mmol of ammonium salt into 5 mL of tetrabutyl titanate, slowly add 0.5 mL of hydrofluoric acid during stirring, and react in the reactor at 160 °C for 24 hours , cooled to room temperature, centrifuged and washed three times with ultrapure water and absolute ethanol, and then vacuum-dried at 50 °C; then, the ground powder was put into a muffle furnace with a heating rate of 1 °C / min at 480 °C Calcined for 60 min; finally, the calcined powder was cooled to room temperature to obtain FeMn-N@TiO 2 ;

[0018] Described iron salt is ferric sulfate;

[0019] Described manganese salt is manganese sulfate;

[0020] Described ammonium salt is ammonium sulfate.

Embodiment 2

[0021] Example 2 FeMn-N@TiO 2 preparation of

[0022] First, add 0.8 mmol of iron salt, 1.0 mmol of manganese salt and 1 mmol of ammonium salt into 5 mL of tetrabutyl titanate, slowly add 0.65 mL of hydrofluoric acid during stirring, and react in the reactor at 180 °C for 21 hours , cooled to room temperature, centrifuged and washed three times with ultrapure water and absolute ethanol, and then vacuum-dried at 50 °C; then, the ground powder was put into a muffle furnace with a heating rate of 2 °C / min, at 520 °C Calcined for 30 min; finally, the calcined powder was cooled to room temperature to obtain FeMn-N@TiO 2 ;

[0023] Described iron salt is ferric chloride;

[0024] Described manganese salt is manganese chloride;

[0025] Described ammonium salt is ammonium chloride.

Embodiment 3

[0026] Example 3 FeMn-N@TiO 2 preparation of

[0027] First, add 0.8 mmol of iron salt, 1.2 mmol of manganese salt and 1 mmol of ammonium salt into 5 mL of tetrabutyl titanate, slowly add 0.8 mL of hydrofluoric acid during stirring, and react in the reactor at 200 °C for 18 hours , after cooling to room temperature, centrifuged and washed three times with ultrapure water and absolute ethanol, and then vacuum-dried at 50°C; then, the ground powder was put into a muffle furnace with a heating rate of 3°C / min, at 560°C Calcined for 10 min; finally, the calcined powder was cooled to room temperature to obtain FeMn-N@TiO 2 ;

[0028] Described iron salt is ferric nitrate;

[0029] Described manganese salt is manganese nitrate;

[0030] Described ammonium salt is ammonium nitrate.

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Abstract

The invention discloses a preparation method of a photocatalyst without noble metal doping, low cost, simple preparation and high photocatalytic activity. It belongs to the field of new nano functional materials and green energy technology. The nitrogen-doped titanium dioxide nanosheet photocatalyst prepared in the present invention is a nitrogen-doped titanium dioxide nanosheet FeMn-N@TiO2 in-situ compounded by iron and manganese bimetal, and has good photocatalytic activity.

Description

technical field [0001] The invention relates to a preparation method of a nitrogen-doped titanium dioxide nanosheet 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 world, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/02C02F1/30C02F101/38B01J35/00
CPCC02F1/30B01J27/24C02F2101/38C02F2305/10B01J35/40B01J35/39
Inventor 张勇吴丹李贺范大伟魏琴
Owner UNIV OF JINAN
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