Preparation method of visible-light-driven photocatalyst nano spherical MoSe2 material

A catalyst and visible light technology, applied in the field of nanomaterials, can solve the problems of wide size range, low purity, low product yield, etc., and achieve the effects of safety and environmental protection, high purity and good crystallinity in the production process.

Inactive Publication Date: 2015-04-15
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Claims
  • Application Information

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Problems solved by technology

As far as the present synthetic method is concerned, there are mainly the following problems: 1. generally use elemental selenium powder as the selenium source in the experimental process, for the two-phase reaction, it cannot be well contacted, and the reaction cannot be effectively carried out; 2. in the experimental process, H 2 Or hydrazine hydrate is a reducing agent, there is a certain risk, and the product yield is low, the purity is low, and the size range is wide, etc.

Method used

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  • Preparation method of visible-light-driven photocatalyst nano spherical MoSe2 material
  • Preparation method of visible-light-driven photocatalyst nano spherical MoSe2 material
  • Preparation method of visible-light-driven photocatalyst nano spherical MoSe2 material

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Embodiment 1

[0021] The visible light catalyst nano-spherical MoSe provided in this example 2 The preparation method of the material is as follows: 0.02mol Na 2 MoO 4 Disperse in 25mL of water, stir continuously to form a clear solution, dissolve 0.04mol of organic selenium source—sodium selenocyanoacetate in 25mL of ethylene glycol in another beaker; mix the two at room temperature, and magnetically Stir for 30 minutes to make it evenly mixed, then transfer it to a 100mL autoclave, and react at 210°C for 24 hours; centrifuge the product obtained after the reaction at a centrifugal speed of 7000rpm for 5 minutes, pour off the upper layer solution, and obtain The lower precipitate was washed with water and ethanol at least 3 times; the washed product was vacuum-dried overnight, and then annealed in a vacuum tube furnace at 450°C for 10 hours to obtain a visible light catalyst nano-spherical MoSe 2 Material.

[0022] attached figure 1 It is the X-ray diffraction (XRD) pattern of the prod...

Embodiment 2

[0031] The visible light catalyst nano-spherical MoSe provided in this example 2 The preparation method of the material is as follows: 0.03mol Na 2 MoO 4Disperse in 25mL of water, stir continuously to form a clear solution, dissolve 0.09mol of organic selenium source—sodium selenocyanoacetate in 25mL of ethylene glycol in another beaker; mix the two at room temperature, and magnetically Stir for 30 minutes to make it evenly mixed, then transfer it to a 100mL autoclave, and react at 180°C for 65 hours; centrifuge the product obtained after the reaction at a centrifugal speed of 7000rpm for 5 minutes, pour off the upper layer solution, and obtain The lower precipitate was washed with water and ethanol at least 3 times; the washed product was vacuum-dried overnight, and then annealed in a vacuum tube furnace at 350°C for 12 hours to obtain a visible light catalyst nano-spherical MoSe 2 Material.

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Abstract

The invention provides a preparation method of a visible-light-driven photocatalyst nano spherical MoSe2 material. The preparation method comprises the following steps: weighing sodium molybdate and organic selenium source selenium sodium cyanoacetate, dissolving sodium molybdate in deionized water to prepare a sodium molybdate solution, dissolving the selenium sodium cyanoacetate in glycol to prepare a selenium sodium cyanoacetate solution, mixing and fully stirring the sodium molybdate solution and the selenium sodium cyanoacetate solution until the solutions are clear and uniformly mixed to prepare mixed liquor; transferring the mixed liquor to a high-pressure reaction kettle using teflon as the lining, and heating in a water bath to obtain a reaction product; centrifuging the reaction product through a centrifugal machine, collecting the lower precipitate and washing by deionized water and ethyl alcohol; drying the washed product and carrying out annealing treatment by a vacuum tube furnace in inert atmosphere to prepare the nano spherical MoSe2 material. The preparation method overcomes the defects in the prior art, and is safe and environment-friendly in the production process and particularly suitable for large-scale industrial production.

Description

technical field [0001] The invention provides a visible light catalytic nano-spherical MoSe 2 The preparation method of the material and its application in the field of photocatalysis belong to the technical field of nanomaterials. Background technique [0002] Since the 1970s, worsening environmental pollution and energy shortages have increased awareness of a potential global crisis. For the sustainable development of human society, it is an urgent task to develop non-polluting environmental restoration technology and alternative clean energy supply. Among various green earth and renewable energy projects, semiconductor photocatalysis is one of the most promising technologies. [0003] To apply photocatalytic reactions in practical applications such as environmental protection and clean energy, one of the core tasks is to develop photocatalytic materials with high solar energy utilization efficiency under natural light. In the past few decades, scientific research has p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B01J35/08
Inventor 戴楚杨超卢佳慧田熙科王龙艳罗东岳
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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