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A kind of preparation method of two-dimensional nano sheet photocatalyst

A two-dimensional nano-sheet light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of reducing photocatalytic activity, unfavorable practical application, and easy mutual influence, etc., to achieve The effect of improving photocatalytic activity, increasing photocatalytic activity, and broadening the range of photosensitive wavelengths

Inactive Publication Date: 2019-03-15
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-TiO 2 / g -C 3 N 4 preparation of

[0015] First, take 1.0 mmol of manganese salt and add it to 5 mL of tetrabutyl titanate. During the stirring process, slowly add 0.6 mL of hydrofluoric acid and react in the reactor at 180 °C for 21 hours. After cooling to room temperature, use ultrapure water After centrifuging and washing with absolute ethanol three times, vacuum-dry at 50°C; secondly, mix 200 mg of the dried solid with 400 mg of melamine, and grind it into a powder; then, put the ground powder into a muffle furnace, and the heating rate is 2 ℃ / min, calcined at 520 ℃ for 2 hours; finally, the calcined powder was cooled to room temperature to obtain Mn-TiO 2 / g -C 3 N 4 ;

[0016] Described manganese salt is manganese chloride.

Embodiment 2

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

[0018] First, take 1.2 mmol of manganese salt and add it to 5 mL of tetrabutyl titanate. During stirring, slowly add 0.8 mL of hydrofluoric acid, and react in the reactor at 200 °C for 18 hours. After cooling to room temperature, use ultrapure water to After centrifuging and washing with absolute ethanol three times, vacuum-dry at 50°C; secondly, mix 250 mg of the dried solid with 400 mg of melamine, and grind it into powder; then, put the ground powder into a muffle furnace, and the heating rate is 3 ℃ / min, calcined at 560 ℃ for 0.5 hours; finally, the calcined powder was cooled to room temperature to obtain Mn-TiO 2 / g -C 3 N 4 ;

[0019] Described manganese salt is manganese nitrate.

Embodiment 3

[0020] Example 3 Mn-TiO 2 / g -C 3 N 4 Photocatalytic activity test of

[0021] A 500 W halogen tungsten lamp is used as the light source, and the distance from the photocatalytic reactor is about 10 cm. A filter is placed between the light source and the reactor to cut off the light with a wavelength less than 420 nm. 0.05 g of Mn-TiO prepared in Example 1 2 / g -C 3 N 4 Add it into 50mL rhodamine B solution with a concentration of 0.01 mmol / L, ultrasonically disperse for 10 min, and then place the material solution in a dark room and stir for 0.5 hour to ensure that the surface adsorption of the sample reaches the adsorption-desorption equilibrium, then stir under light reaction. Take samples every 30 minutes, filter with a filter membrane with a pore size of 0.45 µm, measure the absorbance of the filtrate at a wavelength of 554nm with a UV-visible spectrophotometer, and calculate the concentration and degradation of Rhodamine B solution at different reaction times accor...

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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 two-dimensional nano-sheet photocatalyst prepared by the present invention is manganese-doped titanium dioxide nano-sheet in-situ composite carbon nitride two-dimensional nano-composite material Mn TiO 2 / g‑C 3 N 4 , with good photocatalytic activity.

Description

technical field [0001] The invention relates to a preparation method of a two-dimensional 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, including titaniu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/10C02F1/30C02F101/38
CPCC02F1/30B01J27/24C02F2305/10C02F2101/38B01J35/60B01J35/39
Inventor 张勇魏琴胡丽华闫良国孙旭
Owner UNIV OF JINAN
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