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A kind of preparation method of molybdenum oxide/titanium dioxide composite nanometer photocatalyst

A nano-photocatalyst, titanium dioxide technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of reducing photocatalytic activity, unfavorable practical application, not easy to disperse, etc. Effects of catalytic activity, increasing photocatalytic activity, and widening the range of photosensitive wavelengths

Inactive Publication Date: 2019-04-02
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

[0014] Example 1 Mn-MoO 3 / TiO 2 @g-C 3 N 4 preparation of

[0015] First, add 0.6 mmol sodium molybdate and 0.8 mmol manganese salt into 5 mL tetrabutyl titanate, slowly add 0.5 mL hydrofluoric acid during stirring, react in the reactor at 160 °C for 24 hours, and cool to room temperature Finally, after centrifuging and washing with ultrapure water and absolute ethanol for three times, vacuum-dry at 50°C; secondly, take 150 mg of the dried solid and mix it with 400 mg of melamine, and grind it into a powder; then, put the ground powder into a horse In the Furnace, the heating rate is 1 ℃ / min, and it is calcined at 480 ℃ for 5 hours; finally, the calcined powder is cooled to room temperature to obtain Mn-MoO 3 / TiO 2 @g-C 3 N 4 ;

[0016] Described manganese salt is manganese sulfate.

Embodiment 2

[0017] Example 2 Mn-MoO 3 / TiO 2 @g-C 3 N 4 preparation of

[0018] First, add 0.8 mmol sodium molybdate and 1.0 mmol manganese salt into 5 mL tetrabutyl titanate, slowly add 0.65 mL hydrofluoric acid during stirring, react in the reactor at 180 °C for 21 hours, and cool to room temperature Finally, after centrifuging and washing with ultrapure water and absolute ethanol three times, vacuum-dry at 50°C; secondly, take 200 mg of the dried solid and mix it with 400 mg of melamine, and grind it into a powder; then, put the ground powder into a horse In the Furnace, the heating rate is 2 ℃ / min, and it is calcined at 520 ℃ for 2 hours; finally, the calcined powder is cooled to room temperature to obtain Mn-MoO 3 / TiO 2 @g-C 3 N 4 ;

[0019] Described manganese salt is manganese chloride.

Embodiment 3

[0020] Example 3 Mn-MoO 3 / TiO 2 @g-C 3 N 4 preparation of

[0021] First, add 1.0 mmol sodium molybdate and 1.2 mmol manganese salt into 5 mL tetrabutyl titanate, slowly add 0.8 mL hydrofluoric acid during stirring, react in the reactor at 200 °C for 18 hours, and cool to room temperature Finally, after centrifuging and washing with ultrapure water and absolute ethanol three times, vacuum-dry at 50°C; secondly, take 250 mg of the dried solid and mix it with 400 mg of melamine, and grind it into a powder; then, put the ground powder into a horse In the Furnace, the heating rate is 3 ℃ / min, and it is calcined at 560 ℃ for 0.5 hours; finally, the calcined powder is cooled to room temperature to obtain Mn-MoO 3 / TiO 2 @g-C 3 N 4 ;

[0022] Described manganese salt is manganese nitrate.

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Abstract

The invention discloses a preparation method of a photocatalyst with no noble metal doping, low cost, simple preparation and high photocatalytic activity. It belongs to the field of new nanometer functional materials and green energy technology. The molybdenum oxide / titanium dioxide composite nano-photocatalyst prepared by the invention is a two-dimensional nano-composite material Mn-MoO of in-situ composite manganese-doped molybdenum oxide / titanium dioxide nanosheets on carbon nitride. 3 / TiO 2 @g‑C 3 N 4 , with good photocatalytic activity.

Description

technical field [0001] The invention relates to a preparation method of molybdenum oxide / titanium dioxide composite nanometer 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 catalytic effect, and excites the surrounding oxygen and water molecules 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/02B01J35/00
CPCB01J27/24B01J35/00B01J35/30B01J35/39
Inventor 张勇孙旭魏琴李燕马洪敏
Owner UNIV OF JINAN
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