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Preparation method of titanium dioxide nano-sheet loaded molybdenum diselenide composite photocatalyst

A technology of titanium dioxide and molybdenum diselenide, applied in physical/chemical process catalysts, special compound water treatment, chemical instruments and methods, etc., can solve obstacles to development and application, low quantum efficiency, high photogenerated electron-hole pair recombination Speed ​​and other issues, to achieve good photocatalytic activity, the effect of catalytic activity improvement

Inactive Publication Date: 2018-08-24
镇江海利新材料科技有限公司
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  • Application Information

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Problems solved by technology

[0004] However, TiO 2 There are also some defects in photocatalysts, for example, its photoresponse range is narrow and can only be excited by ultraviolet light in sunlight; the quantum efficiency is low, and it has a high photogenerated electron-hole pair recombination rate, which hinders its further development and application

Method used

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  • Preparation method of titanium dioxide nano-sheet loaded molybdenum diselenide composite photocatalyst
  • Preparation method of titanium dioxide nano-sheet loaded molybdenum diselenide composite photocatalyst

Examples

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Embodiment example 1

[0044] Preparation of molybdenum diselenide composite photocatalyst supported by titanium dioxide nanosheets

[0045] Weigh 0.8 g of P25 and dissolve it in 50 mL of NaOH (20 mol / L) solution; pour the solution into a reaction kettle and heat at 200°C for 72 hours. After the reaction was completed, the product was soaked in 0.1mol / L HCl solution for 24 hours, washed by centrifugation, and dried; then calcined in a tube furnace at 500°C for 3 hours to obtain TiO 2 Nanosheets.

[0046] Weigh 0.5 gTiO 2 Nanosheets, added to 50 mL of water, stirred evenly; then added 0.017g Na 2 MoO 4 , stir evenly; then add 0.016g of Se powder, stir evenly, add 0.03g NaBH 4 ; Put the mixed solution above into a high-pressure reactor for hydrothermal reaction at a reaction temperature of 200° C. for 48 hours. After the reaction is completed, wash by centrifugation, first wash with ethanol for 4 times, then wash with water for 2 times, the centrifugation speed is 8000rpm, and the time is 7min. ...

Embodiment example 2

[0048] Degradation of Methyl Orange by Molybdenum Diselenide Composite Photocatalyst Supported by Titanium Dioxide Nanosheets under Visible Light Irradiation

[0049] The titanium dioxide nanosheets supported molybdenum diselenide composite photocatalyst prepared by the method of Example 1 was used for the degradation experiment of methyl orange. The concentration of methyl orange solution is 1×10 -6 mol L -1 Take 50 mg of composite material powder, place in 100 mL of the above-mentioned methyl orange solution, stir in a dark room for 60 minutes, then place the solution in a visible light source where ultraviolet light is filtered out, take 5 mL of methyl orange solution every 10 minutes, The characteristic peak of methyl orange in the solution was measured by UV-Vis spectrophotometer.

[0050]Obtain the degradation curve of visible light degradation of methyl orange by titanium dioxide nanosheet loaded molybdenum diselenide composite photocatalyst according to implementatio...

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Abstract

The invention discloses a preparation method of a titanium dioxide nano-sheet loaded molybdenum diselenide composite photocatalyst, and applications of the titanium dioxide nano-sheet loaded molybdenum diselenide composite photocatalyst in photocatalytic degradation of pollutants, and belongs to the technical field of material preparation and photocatalysis. According to the present invention, thecatalyst has two-dimensional morphology characteristic, and is formed by compounding two-dimensional structure TiO2 nano-sheets and molybdenum diselenide nanoparticles; during the preparation of thephotocatalyst, the titanium dioxide nano-sheet loaded molybdenum diselenide composite photocatalyst is synthesized by using the simple hydrothermal method; and under the action of molybdenum diselenide, the titanium dioxide nano-sheet loaded molybdenum diselenide composite photocatalyst has good adsorption performance and good photocatalytic performance so as to promote the application of TiO2 photocatalysts.

Description

technical field [0001] The invention belongs to the technical field of material synthesis and photocatalysis, and mainly relates to the preparation of a molybdenum diselenide composite photocatalyst supported by titanium dioxide nanosheets and the research on its photocatalytic activity. Background technique [0002] With the strengthening of people's awareness of environmental protection, the problem of water pollution has received more and more attention. Traditional sewage treatment methods can no longer meet people's requirements. Finding out a clean, efficient, energy-saving and environmentally friendly sewage treatment method has become a hot research direction. [0003] Since the first discovery of TiO in 1972 2 Since it has photocatalytic activity, the research on photocatalytic technology has always been a hot spot in the field of materials. Photocatalytic technology provides a very good solution for sewage treatment by virtue of its advantages of energy saving, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057C02F1/30C02F101/30C02F101/38
CPCC02F1/30B01J27/0573C02F2305/10C02F2101/40C02F2101/30B01J35/39
Inventor 梁智萍张松利
Owner 镇江海利新材料科技有限公司
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