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A kind of room temperature liquid phase method prepares the method for SNSE microsphere

A technology of microsphere and liquid phase method, which is applied in the direction of binary selenium/tellurium compounds, metal selenide/telluride, etc., can solve the problems of long reaction time, high synthesis cost, secondary pollution, etc., and achieve energy saving and Generates cost, high repeatability, small product size effects

Active Publication Date: 2019-03-05
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned preparation methods generally have the characteristics of long reaction time, high temperature / high pressure environment, small yield, need to add reaction catalysts, surfactants, and rely on substrate growth, etc., which makes the synthesis cost too high, and the preparation process causes secondary pollution to the environment, etc.

Method used

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  • A kind of room temperature liquid phase method prepares the method for SNSE microsphere
  • A kind of room temperature liquid phase method prepares the method for SNSE microsphere

Examples

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Effect test

Embodiment 1

[0023] Add 0.1579g of selenium powder to 10mL of hydrazine hydrate, stir until the selenium powder is completely dissolved to form wine red solution A; weigh 0.2256g of SnCl 2 2H 2 O was added to the above solution A, and stirred until it turned into light yellow solution B; put solution B on a magnetic stirrer and stirred at a speed of 500r / min for 2h, after which solution B gradually turned black. Then, the solution B was centrifuged to obtain a black powder, which was repeatedly washed with absolute ethanol for 3 times and dried to obtain SnSe microspheres.

Embodiment 2

[0025] Add 0.3158g of selenium powder to 20mL of hydrazine hydrate, stir until the selenium powder is completely dissolved to form wine red solution A; weigh 0.6g of SnCl 2 2H 2 O was added to the above solution A, and stirred until it turned into a light yellow solution B; the solution B was placed on a magnetic stirrer and stirred at a speed of 800r / min for 3 hours, and then the solution B gradually turned black. Then, the solution B was centrifuged to obtain a black powder, which was repeatedly washed with absolute ethanol for 3 times and dried to obtain SnSe microspheres.

Embodiment 3

[0027] Add 0.6316g of selenium powder to 25mL of hydrazine hydrate, stir until the selenium powder is completely dissolved to form wine red solution A; weigh 1.0g of SnCl 2 2H 2 O was added to the above solution A, and stirred until it turned into light yellow solution B; put solution B on a magnetic stirrer and stirred at a speed of 900r / min for 3h, after which solution B gradually turned black. Then, the solution B was centrifuged to obtain a black powder, which was repeatedly washed with absolute ethanol for 3 times and dried to obtain SnSe microspheres.

[0028] The sample (SnSe microspheres) was analyzed with a Rigaku D / max2000PC X-ray diffractometer, and it was found that the sample was consistent with the orthorhombic SnSe structure of JCPDS No. 65-3811, indicating that this method can produce pure phase SnSe. Observing the sample with a field emission scanning electron microscope (FESEM), it can be seen that the prepared SnSe product is a uniform microsphere of 0.5-1 ...

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Abstract

The invention provides a SnSe microsphere preparation method using a room-temperature liquid-phase method. The sizes of SnSe microspheres are about 0.5-1 micrometer. Firstly, a certain amount of selenium powder is weighed and added into hydrazine hydrate, and stirring is conducted till the selenium powder is dissolved completely and a wine-red solution A is formed; then, a certain amount of SnCl2.2H2O is weighed and added into the solution A, and stirring is conducted till a pale-yellow solution B is formed; finally, the solution B is placed on a magnetic stirrer to be stirred at a certain speed for a period of time, centrifugation is conducted to collect black powder, the black powder is dried, and the SnSe microspheres are obtained. The method is simple in technology and process, short in preparation cycle and high in repeatability, heating is not needed because the reaction is conducted at the room temperature, template agents and catalysts are not needed, the energy consumption is greatly reduced, the production cost is saved, and the method is suitable for large-scale production and preparation.

Description

【Technical field】 [0001] The invention relates to the technical field of preparing SnSe microspheres, in particular to a method for preparing SnSe microspheres by a liquid phase method at room temperature. 【Background technique】 [0002] The Group IV-VI semiconductor compound tin selenide is capable of forming compounds with various stoichiometric ratios, such as SnSe, SnSe 2 and Sn 2 Se 3 , where SnSe and SnSe 2 It has a broad application prospect. Tin selenide (SnSe) is an important semiconductor material with a bandgap of about 0.9eV. It has good electrical and optical properties and is widely used in infrared optoelectronic instruments, memory switches, and solid-phase media for holograms. , research on electrode materials for lithium-ion / sodium-ion batteries, and absorption materials for thin-film solar cells. Therefore, the research on tin selenide is a hot direction. [0003] According to literature reports, the size and shape of materials have a huge impact on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/04
CPCC01B19/007C01P2002/72C01P2004/03C01P2004/32C01P2004/61
Inventor 黄剑锋程娅伊李嘉胤曹丽云罗艺佳刘长青周磊
Owner SHAANXI UNIV OF SCI & TECH
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