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Preparation method of cerium vanadate modified molybdenum diselenide composite photocatalyst

A technology of molybdenum diselenide and cerium vanadate, which is applied in the field of material synthesis and photocatalysis, can solve the problems of molybdenum diselenide photocatalytic efficiency, stability and repeated use, and achieve good photocatalytic activity and catalytic activity improvement Effect

Inactive Publication Date: 2018-08-21
XINGHUA PRECISION CASTING & FORGING IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photocatalytic efficiency, stability and reusability of molybdenum diselenide modified by the above method are limited to some extent.

Method used

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  • Preparation method of cerium vanadate modified molybdenum diselenide composite photocatalyst
  • Preparation method of cerium vanadate modified molybdenum diselenide composite photocatalyst

Examples

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Effect test

Embodiment example 1

[0049] Preparation of a molybdenum diselenide composite photocatalyst modified by cerium vanadate.

[0050] Weigh Na 2 MoO 4 1.7g, dissolve in 50mL aqueous solution, stir well; then add 1.6g Se powder into the solution, stir well; then add NaBH 4 0.2595g, stir evenly; put the solution into a reaction kettle for hydrothermal reaction, the reaction temperature is 200°C, and the reaction time is 48h. 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 10000rpm, and the time is 6min. Finally, dry in an oven at 60°C and grind to obtain molybdenum diselenide.

[0051] Weigh 0.5g of molybdenum diselenide and disperse it in 50mL of water, add 0.1g of cerium nitrate, and stir evenly; then add 0.03g of ammonium vanadate, stir evenly, and carry out hydrothermal reaction at 180°C for 15h. The product is washed by centrifugation and dried to obtain a molybdenum diselenide composite ...

Embodiment example 2

[0053] Cerium vanadate-modified molybdenum diselenide composite photocatalyst degrades methyl orange under visible light irradiation.

[0054] The cerium vanadate-modified molybdenum diselenide composite photocatalyst prepared according to the method of Example 1 was subjected to a methyl orange degradation experiment. The concentration of methyl orange solution is 1×10 -5 mol L -1 Get composite material powder 50mg, be placed in the above-mentioned methyl orange solution of 100mL, stir 40 minutes in darkroom, then solution is placed in the visible light source that ultraviolet light is filtered out, take 5mL methyl orange solution every 10 minutes, The characteristic peak of methyl orange in the solution was measured by UV-Vis spectrophotometer.

[0055] Obtain the degradation curve of cerium vanadate modified molybdenum diselenide composite photocatalyst visible light degradation methyl orange by implementation case 2, see figure 2 . from figure 2It can be seen that t...

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Abstract

The invention discloses a preparation method of a cerium vanadate modified molybdenum diselenide composite photocatalyst, and applications of the cerium vanadate modified molybdenum diselenide composite photocatalyst in the field of environmental pollutant treatment, and belongs to the field of material preparation and photocatalysis research. The cerium vanadate modified molybdenum diselenide composite photocatalyst possesses three dimensional morphology characteristics, and is prepared via combination of molybdenum diselenide sheets of a two dimensional structure with cerium vanadate nanoparticles. In the preparation process, simple hydrothermal method is adopted to realize synthesis of the cerium vanadate modified molybdenum diselenide composite photocatalyst. Under the effect of ceriumvanadate, the cerium vanadate modified molybdenum diselenide composite photocatalyst possesses excellent photocatalytic performance, and applications of molybdenum diselenide catalyst are promoted.

Description

technical field [0001] The invention belongs to the technical field of material synthesis and photocatalysis, and mainly relates to the preparation of a cerium vanadate-modified molybdenum diselenide composite photocatalyst 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, environmental pr...

Claims

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Application Information

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IPC IPC(8): B01J27/057B01J37/10C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J23/002B01J27/0573B01J37/10C02F2101/308C02F2101/40C02F2101/38C02F2101/34C02F2305/10B01J35/23B01J35/39
Inventor 张松利马开梅梁智萍
Owner XINGHUA PRECISION CASTING & FORGING IND RES INST CO LTD
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