Method for preparing bismuth sulfide whiskers and the bismuth sulfide whiskers

A bismuth sulfide and whisker technology, which is applied in the field of preparation of bismuth sulfide whiskers, can solve the problems of poor controllability, sensitivity, inability to obtain the size and length of bismuth sulfide whiskers, and achieve easy concentration and dosage, concentration and dosage regulation, The effect of controllable product shape

Inactive Publication Date: 2008-11-26
BEIJING HANGBO NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 1998, Mater.Lett. reported on pages 116-119 of volume 35 that ethanol was used as a solvent to synthesize bismuth sulfide microrods by solvothermal synthesis, but the particle size of the product prepared by this method was not uniform; in addition, in 2007, J.Cryst. Growth volume 306 pages 159-165 reported the surfactant-assisted solvothermal method to prepare bismuth sulfide nanorods, but this method requires the addition of organic solvents
In early 2008, the inventor published an article on his preliminary research results in Volume 34 249-251 of Ceramics International, reporting that potassium hydroxide (0.025M) was use

Method used

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  • Method for preparing bismuth sulfide whiskers and the bismuth sulfide whiskers
  • Method for preparing bismuth sulfide whiskers and the bismuth sulfide whiskers
  • Method for preparing bismuth sulfide whiskers and the bismuth sulfide whiskers

Examples

Experimental program
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Effect test

example 1

[0023] Weigh 0.002mol Bi(NO 3 ) 3 ·5H 2 O (0.9701 grams) and 0.004mol CS (NH 2 ) 2 (0.3045 grams) mix, and its molar ratio is 1: 2, adds LiOH solid 1.049 grams and 50ml distilled water, makes the concentration of LiOH in the mixture solution be 0.5M. Take 50ml of the above mixture (hydrothermal precursor) and stir it at room temperature for 1h, then transfer it to a 100ml polytetrafluoroethylene-lined autoclave, and conduct a hydrothermal reaction at 200°C for 16h to separate the precipitated product. The precipitated product was washed 3 times with distilled water and 3 times with absolute ethanol, and then dried in a vacuum oven at 70° C. for 4 hours to obtain a black powder product. The black powder was identified as orthorhombic Bi by X-ray diffraction (XRD). 2 S 3 . Scanning electron microscopy observations showed that the product Bi 2 S 3 The black powder is mostly composed of whiskers with a diameter of 100-500nm and a length of about 10μm and microcrystals com...

example 2

[0025] Weigh 0.002mol Bi(NO 3 ) 3 ·5H 2 O with 0.004mol CS(NH 2 ) 2 Mixing, the molar ratio is 1:2, add 2.098 g of LiOH solid and 50 ml of distilled water, so that the concentration of LiOH in the mixture solution is 1.0M to form a hydrothermal precursor. Take 50ml of the above mixture and stir it at room temperature for 1h, then transfer it to a 100ml polytetrafluoroethylene-lined autoclave, carry out hydrothermal reaction at 200°C for 16h, and separate the precipitated product. The precipitated product was washed 3 times with distilled water and 3 times with absolute ethanol, and then dried in a vacuum oven at 70° C. for 4 hours to obtain a black powder product. The product was identified as orthorhombic Bi by X-ray diffraction (XRD) 2 S 3 ,Such as image 3 (b) shown. Scanning electron microscopy observations showed that the product Bi 2 S 3 The black powder is composed of uniformly dispersed whiskers with an average diameter of 250nm and a length of about 20μm. S...

example 3

[0027] Other conditions are the same as in Example 2, wherein the concentration of LiOH in the hydrothermal precursor is 1.5M. The black powder product that obtains is identified as the Bi of orthorhombic phase through X-ray diffraction (XRD) 2 S 3 , scanning electron microscopy observations show that: Bi 2 S 3 Most of the product is composed of whiskers with a diameter of about 200-300 nm and a length of about 20 μm, with good uniformity (but not as good as the product in Example 2), and only a small part of particles exist. Such as figure 1 (d) shown.

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Abstract

The invention relates to a preparation method of bismuth sulfide whisker, which applies hydrothermal synthesis method, and chooses Bi(NO3)3.5H2O, CS(NH2)2 and LiOH as raw materials and H2O as a hydrothermal reaction medium. The method applies LiOH of 1.0 to 1.5M as a mineralizing agent, and the bismuth sulfide whisker can be got by the hydrothermal reaction for 16 hours at a temperature of 200 DEG C. The preparation method provided by the invention can get the bismuth sulfide whisker with an average diameter of 200 to 300nm and the length equals to or above 20Mum, which has wide application prospect in the research fields of thermoelectricity, photoelectricity and infrared spectrum, etc.

Description

Technical field: [0001] The invention relates to the field of chemical synthesis, in particular to a preparation method and products of bismuth sulfide whiskers. Background technique: [0002] As a V-VI semiconductor compound, bismuth sulfide has attracted widespread attention due to its good photoelectric, photosensitive, infrared properties and pyroelectric effects, and has shown a new application prospect in the field of electronics. Studies have shown that with the reduction of material dimensions, quantum size effects, quantum interference effects, quantum tunneling effects, and Coulomb blockade effects have a significant impact on the optical, electrical, magnetic, thermal, and mechanical properties of materials. One-dimensional semiconductor materials play the role of interconnection and functional units in the manufacture of electronic and optoelectronic devices, and are widely used in optoelectronic components, such as making light-emitting diodes, room temperature ...

Claims

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Application Information

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IPC IPC(8): C30B29/46C30B29/62C30B7/10
Inventor 马峻峰刘俊任仰林波涛姜晓辉孙勇刘振森
Owner BEIJING HANGBO NEW MATERIAL TECH
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