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Petal-shaped tungsten sulfide nano-sphere, preparation method and application of nano-sphere

A technology of tungsten sulfide and nanospheres, applied in the field of nanomaterials, can solve problems such as scarcity restricting large-scale application, and achieve the effects of abundant raw materials, improved performance, and good electrocatalytic stability

Inactive Publication Date: 2017-09-22
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent decades, hydrogen storage, hydrogen production and other technologies have been developed by leaps and bounds. In recent years, the technology of obtaining hydrogen through water splitting has attracted the favor of many scholars. Platinum-based and other precious metal materials are used as efficient hydrogen evolution Catalysts, however, limit the conditions for large-scale applications due to their scarcity

Method used

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  • Petal-shaped tungsten sulfide nano-sphere, preparation method and application of nano-sphere

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preparation example Construction

[0027] The preparation method of petal-shaped tungsten sulfide nanospheres of the present invention comprises the following steps: (a) dissolving tungstate and thiourea in water to form a mixed solution; the mass ratio of tungstate and thiourea is 4.2:1.3~ 5.3; (b) Put the mixed solution in an autoclave, conduct hydrothermal reaction at 220~250°C, centrifuge, wash with water, and dry. Using sodium tungstate and thiourea as raw materials, the preparation process is simple, the required equipment is conventional, the raw materials are abundant, and the price is cheap, realizing the low-cost synthesis of petal-shaped tungsten sulfide nano-electrocatalysts.

[0028] In step (b), after the hydrothermal reaction, naturally cool to room temperature, take out the autoclave, pour off the upper layer of transparent liquid and take out the black precipitate; add alcohol to the black precipitate for centrifugal cleaning; the time of the hydrothermal reaction is 18-24 hours; the drying met...

Embodiment 1

[0031] The present embodiment provides a kind of preparation method of petal-shaped tungsten sulfide nanosphere, and it comprises the following steps:

[0032] (a) Add 4.2g of sodium tungstate and 1.3g of thiourea into 50ml of deionized water, and stir ultrasonically for 30 minutes to form a mixed solution;

[0033] (b) Transfer the mixed solution to an autoclave, heat it up to 220°C, and keep it for 24 hours; then cool it down to room temperature and take it out, pour the upper transparent liquid into the waste liquid bucket, and take out the black precipitate; add alcohol, and centrifuge for 3 Then add deionized water, centrifuge and wash 3 times; the product obtained after centrifugation can be freeze-dried by freeze-drying, and the obtained tungsten sulfide nanospheres are named WS 2 -1.

Embodiment 2

[0035] This embodiment provides a preparation method of petal-shaped tungsten sulfide nanospheres, the preparation steps of which are basically the same as in Example 1, the difference is that 2.6 g of thiourea is added, and the obtained tungsten sulfide nanospheres are named WS 2 -2.

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Abstract

The invention relates to a tripetaloid tungsten sulfide nano-sphere, a preparation method and an application of the nano-sphere. The preparation method includes the steps: (a) dissolving tungstate and thiourea in water to form mixed solution; (b) placing the mixed solution in a high-pressure autoclave, performing hydrothermal reaction at the temperature of 220-250 DEG C, and centrifuging, washing and drying the mixed solution. The weight ratio of the tungstate to the thiourea is 4.2:(1.3-5.3). The preparation process is simple, needed equipment is conventional, raw materials are rich, the price is low, a petal-shaped tungsten sulfide nano electro-catalyst is synthesized at low cost, the prepared petal-shaped tungsten sulfide catalyst has good electro-catalytic stability, and stable electro-catalytic hydrogen evolution activity is still kept after circulation is performed for 40000 seconds.

Description

technical field [0001] The invention belongs to the field of nanometer materials and relates to a petal-shaped tungsten sulfide, in particular to a three-petal-shaped tungsten sulfide nanosphere, a preparation method and an application thereof. Background technique [0002] With the progress and development of society, the development of the energy field and the resulting energy consumption and environmental problems have become the focus of attention all over the world. At present, fossil energy sources such as coal, oil, and natural gas are increasingly depleted. With the increasing problems of climate warming and environmental degradation, people have begun to try to develop new clean energy sources. As the clean and efficient renewable energy with the highest energy density known so far, hydrogen is the new energy with the most development potential in the 21st century, and it is expected to replace fossil energy in the near future and be widely used in people's producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00B01J27/047
CPCC01G41/00B01J27/047C01P2004/32C01P2004/03B01J35/33
Inventor 王显福汤凯晏成林
Owner SUZHOU UNIV
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