Method for synchronous precipitation and polymeric synthesis of floatable silver sulfide nanocrystalline

A technology of nanocrystals and silver sulfide, applied in chemical instruments and methods, silver compounds, silver compounds, etc., can solve the problems of large particle size of silver sulfide, easy sinking to the bottom, high cost, etc., to achieve inhibition of agglomeration, improvement of dispersion, The effect of cost reduction

Inactive Publication Date: 2010-11-17
HEILONGJIANG UNIV
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  • Abstract
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Problems solved by technology

[0003] The present invention aims to solve the problem that the existing microemulsion method for preparing silver sulfide needs to add a surfactant to increase the cost and the prepared silver sulfide has a large particle size and is easy to sink to the bottom in water, and provides a floating silver sulfide nano Synchronous Precipitation-Polymerization Synthesis of Crystals

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  • Method for synchronous precipitation and polymeric synthesis of floatable silver sulfide nanocrystalline
  • Method for synchronous precipitation and polymeric synthesis of floatable silver sulfide nanocrystalline
  • Method for synchronous precipitation and polymeric synthesis of floatable silver sulfide nanocrystalline

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specific Embodiment approach 1

[0007] Specific embodiment one: the synchronous precipitation-polymerization synthesis method of a kind of floatable silver sulfide nanocrystal of the present embodiment is carried out according to the following steps: one, add 24mL~26mL volume concentration by 1g silver nitrate and be the ratio of 95% ethanol, Weigh silver nitrate and ethanol with a volume concentration of 95%, add silver nitrate to ethanol, and then place it in an ultrasonic processor with a frequency of 30kHz to 50kHz for 30min to 50min to obtain a silver nitrate solution; The volume ratio of ethanol in step 1 is 1:1, and the mass ratio of 3-mercaptopropyltrimethoxysilane to silver nitrate in step 1 is 1.4~1.6:1. Weigh toluene and 3-mercaptopropyltrimethoxysilane , then adding toluene to the silver nitrate solution obtained in step 1, stirring for 5-10 minutes, then adding 3-mercaptopropyltrimethoxysilane dropwise, after the dropwise addition, continue stirring for 55-65 minutes to obtain a sol; 3. Add the ...

specific Embodiment approach 2

[0009] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, add 24.3mL~25.7mL the ratio of ethanol whose volume concentration is 95% by 1g silver nitrate, take silver nitrate and volume concentration is 95% of ethanol. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0010] Specific embodiment three: what this embodiment is different from specific embodiment one or two is: in step one, add 25.0mL volume concentration by the ratio of 95% ethanol by 1g silver nitrate, take by weighing silver nitrate and volume concentration be 95% ethanol. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for synchronous precipitation and polymeric synthesis of floatable silver sulfide nanocrystalline, relates to a preparation method of the silver sulfide, and solves the problems that a surfactant is needed to be added so as to increase the cost and the prepared silver sulfide has large grain diameter and easily sinks to the bottom in water in the conventional microemulsion method. The method comprises the following steps of: 1, preparing solution of silver nitrate ethanol; 2, adding toluene into the silver nitrate ethanol, and dripping 3-mercaptotrimethoxy silane, and stirring to obtain sol; 3, performing hydrothermal synthesis; 4, distilling; 5, drying; and 6, roasting to obtain the floatable silver sulfide nanocrystalline. The floatable silver sulfide nanocrystalline is spherical particles, has the grain diameter of 2 to 20nm, and can float on the water surface. During preparation, the surfactant is not used, so that the cost is reduced; and the reaction condition is mild and easily controlled. The method can be applied to the fields of photocells, photocouductors, photocatalysts, IR detectors, and the like.

Description

technical field [0001] The present invention relates to the preparation method of silver sulfide. Background technique [0002] As a direct narrow-band semiconductor, silver sulfide has been widely used in photovoltaic cells, photoconductors, photocatalysts and IR detectors because of its good chemical stability and photoelectric properties. The existing microemulsion method for preparing silver sulfide is to disperse the sulfur source material in a solvent with surfactants and co-surfactants, and prevent nanoparticles from Aggregation, thereby controlling particle size. This method must use a surfactant to inhibit agglomeration, thereby increasing the preparation cost, and the particle size of the obtained silver sulfide particles is 20nm to 80nm, the particle size is large, and it is easy to deposit at the bottom in water, and the dispersion is not good, which is not conducive to application. . Contents of the invention [0003] The present invention aims to solve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G5/00B82B3/00
Inventor 井立强秦旭范旭欣付宏刚
Owner HEILONGJIANG UNIV
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