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A kind of preparation method of two-dimensional nano photocatalyst

A two-dimensional nanometer and photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of cumbersome process and low yield, and achieve no precious metal doping and low cost , Increase the effect of photocatalytic activity

Active Publication Date: 2018-11-23
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, most of the synthesis methods are synthesized separately, and then compound the catalyst and the carrier, the process is cumbersome and the yield is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Mn-TiO 2 / MoS 2 preparation of

[0024] (1) Add 0.6 g of molybdenum disulfide powder and 0.2 mmol of manganese salt to 3 mL of n-butyllithium solution, and stir for 12 hours under nitrogen protection at 60 °C to obtain the reacted solution;

[0025] (2) Wash the reacted solution in step (1) with a non-polar solvent, and then perform ultrasonic treatment in a water bath at 60 °C. After the treatment, wash the treated solution with a non-polar solvent, and dry it in vacuum to obtain manganese Intercalated molybdenum disulfide nanomaterials;

[0026] (3) Take 500 mg of manganese-intercalated molybdenum disulfide nanomaterials prepared in step (2) and add them to 5 mL of tetrabutyl titanate. After stirring for 1 hour, slowly add 0.5 mL of hydrofluoric acid while stirring, and then Reaction in the reactor at 160°C for 18 hours;

[0027] (4) The reaction product obtained in step (3) was centrifuged and washed three times with ultrapure water and absolute ethanol...

Embodiment 2

[0032] Example 2 Mn-TiO 2 / MoS 2 preparation of

[0033] (1) Add 0.6 g of molybdenum disulfide powder and 1.0 mmol of manganese salt to 5 mL of n-butyllithium solution, and stir for 24 hours under nitrogen protection at 30 °C to obtain the reacted solution;

[0034] (2) Wash the reacted solution in step (1) with a non-polar solvent, and then perform ultrasonic treatment in a water bath at 30 °C. After the treatment, wash the treated solution with a non-polar solvent, and dry it in vacuum to obtain manganese Intercalated molybdenum disulfide nanomaterials;

[0035] (3) Add 200 mg of manganese-intercalated molybdenum disulfide nanomaterials prepared in step (2) into 5 mL of tetrabutyl titanate, stir for 1 hour, then slowly add 0.6 mL of hydrofluoric acid while stirring, and then Reaction in the reactor at 180°C for 20 hours;

[0036](4) The reaction product obtained in step (3) was centrifuged and washed three times with ultrapure water and absolute ethanol, and then vacuum-...

Embodiment 3

[0041] Example 3 Mn-TiO 2 / MoS 2 Photocatalytic activity test of

[0042] 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. 2 mg of Mn-TiO prepared in Example 1 2 / MoS 2 Add it to 50 mL of methyl orange solution with a concentration of 0.1 mmol / L, ultrasonically disperse for 10 min, 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, and then stir under light react. Take a sample every 10-20 min, filter it with a filter membrane with a pore size of 0.45 µm, measure the absorbance of the filtrate at a wavelength of 462 nm with a UV-visible spectrophotometer, and calculate the formazan at different reaction times according to the proportionality between the concentration o...

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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. In this method, manganese-doped titanium dioxide nanosheets were in-situ composited on manganese-intercalated molybdenum disulfide nanosheets, and a two-dimensional nanosheet photocatalyst MnTiO2 / MoS2 was prepared in one pot. The prepared Mn-TiO2 / MoS2 can be applied in the fields of photocatalytic water splitting for hydrogen production, photocatalytic degradation of organic pollutants, and preparation of solar photovoltaic cells. The invention belongs to the technical field of novel nano functional materials and green energy.

Description

technical field [0001] The invention relates to a preparation method of a two-dimensional nano photocatalyst. It belongs to the field of new nano functional materials and green energy technology. Background technique [0002] Photocatalyst is a substance that does not change itself under the irradiation of light, but can promote chemical reactions. For example, common chlorophyll is a typical photocatalyst, which can promote carbon dioxide and hydration in the air in the photosynthesis of plants. become oxygen and carbohydrates. The catalysis of photocatalysts is to convert light energy into energy required for chemical reactions under the irradiation of light that exists in nature. Photocatalysts can excite surrounding oxygen and water molecules into free negative ions with great oxidative power, thereby decomposing all organic substances and some inorganic substances that are harmful to the human body and the environment. Moreover, photocatalysts can not only accelerate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051
CPCB01J27/051B01J35/004B01J35/0073
Inventor 张勇张清雨魏琴王晓东孙旭
Owner UNIV OF JINAN
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