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Preparation of high-purity tin diselenide nano-plate

A technology for tin diselenide and nanosheets, which is applied in the field of preparation of tin diselenide nanosheets synthesized by hydrothermal method, can solve the problems such as insufficient purity of the nanosheets, and achieves good dispersibility, uniform shape, and safe process. Effect

Inactive Publication Date: 2009-04-22
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The paper discloses a SnSe 2 The preparation method of nanosheets, although the products are similar, are different in raw materials and process flow. The raw materials used in the prior art are SnCl 2 2H 2 O and NaSeO 3 ·5H 2 O, and the raw material that the present invention adopts is SnCl 2 2H 2 O, SeO 2 , and due to the difference in raw materials, the follow-up process methods are all different. The most important thing is that there is part of Se in the product obtained by the method of the prior art, resulting in SnSe 2 The purity of the nanosheets is not enough, which is clearly visible in the XRD pattern in the paper that there is a diffraction peak with a higher intensity of heterophase Se

Method used

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  • Preparation of high-purity tin diselenide nano-plate
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  • Preparation of high-purity tin diselenide nano-plate

Examples

Experimental program
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Effect test

Embodiment 1

[0024] 1.0 parts of SnCl 2 2H 2 O, 0.984 parts of SeO 2 , 0.210 parts of NaOH three solid powders were evenly mixed, and then 12 parts of deionized water were added, and the method of ultrasonic vibration and stirring was used to make them evenly mixed. The above mixture solution was poured into a polytetrafluoroethylene-lined autoclave, and then 0.95 parts of 85% hydrazine and 1.2 parts of 17% ammonia water were added. Heat the above-mentioned reaction tank to 180°C for 20 hours, then cool to room temperature and take it out. The reacted solution is filtered through a water-based microporous membrane, repeatedly washed with deionized water and absolute ethanol, filtered and separated to remove impurities, and washed until neutral. The obtained product after the above washing was dried in a vacuum oven at 70° C. to obtain tin diselenide powder. After detection, the obtained SnSe 2 The purity is 100%.

Embodiment 2

[0026] 0.8 parts of SnCl 2 2H 2 O, 0.787 parts of SeO 2 , 0.280 parts of NaOH three solid powders were evenly mixed, and then 14 parts of deionized water were added, and the method of ultrasonic vibration and stirring was used to make them uniformly mixed. The above mixture solution was poured into a polytetrafluoroethylene-lined autoclave, and then 1.9 parts of 80% hydrazine and 0.80 parts of 20% ammonia water were added. Heat the above reaction tank to 160°C, keep it warm for 24 hours, then cool to room temperature and take it out. The reacted solution is filtered through a water-based microporous membrane, repeatedly washed with deionized water and absolute ethanol, filtered and separated to remove impurities, and washed until neutral. The obtained product after the above washing was dried in a vacuum oven at 50° C. to obtain tin diselenide powder. After detection, the obtained SnSe 2 The purity is 99.5%.

Embodiment 3

[0028] 1.2 parts of SnCl 2 2H 2 O, 1.18 parts of SeO 2 , 0.400 parts of NaOH three solid powders were evenly mixed, and then 16 parts of deionized water were added, and the method of ultrasonic vibration and stirring was used to make them uniformly mixed. The above mixture solution was poured into a polytetrafluoroethylene-lined autoclave, and then 1.5 parts of 85% hydrazine and 1.6 parts of 15% ammonia water were added. The above reaction tank was heated to 200°C for 16 hours, then cooled to room temperature and taken out. The reacted solution is filtered through a water-based microporous membrane, repeatedly washed with deionized water and absolute ethanol, filtered and separated to remove impurities, and washed until neutral. The obtained product after the above washing was dried in a vacuum oven at 80° C. to obtain tin diselenide powder. After detection, the obtained SnSe 2 The purity is 99.5%.

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Abstract

The invention provides a preparation method for a high-purity tin diselenide nanometer piece, and relates to the technical field of hydrothermal chemical synthesis nanometer material process. According to the invention, three solid powders of SnCL2.2H2O, SeO2 and NaOH, hydrazine, and ammonia water are adopted to prepare the tin diselenide nanometer piece through the steps of reaction, heating, washing, drying and the like. The obtained tin diselenide has high purity, good dispersibility, and a regular and even shape. The technical process is safe; and the auxiliary solution and products of the process can be easily treated without pollution. Therefore, the method has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of hydrothermal chemical synthesis of nanomaterials, in particular to a preparation method for synthesizing tin diselenide nanosheets by hydrothermal method. Background technique [0002] Nanomaterials refer to materials that have at least one dimension in the three-dimensional space in the nanoscale range of 1-100nm or are composed of them as basic units. Nanomaterials have raised many new topics for condensed matter physics. Due to the small size of nanomaterials, the quantum size effect is very significant, which makes the optical, thermal, electrical, magnetic and other physical properties of nanomaterial systems different from conventional materials, and many novel properties appear. ; Another important feature of nanomaterials is the surface effect. As the size decreases, the specific surface area increases greatly, resulting in a large difference between the chemical properties of the nanosystem and ...

Claims

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Application Information

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IPC IPC(8): C01B19/04
Inventor 刘科高汤爱君马海龙
Owner SHANDONG JIANZHU UNIV
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