Preparation for monodisperse, argentic sulfide and silver selenide nanocrystal

A silver nanocrystal, monodisperse technology, applied in the direction of alkali metal sulfide/polysulfide, copper sulfide, nanotechnology, etc., can solve the problems of poor product quality stability, high reaction toxicity, difficult mass production, etc., to achieve reaction toxicity Small size, short reaction time and uniform particle size distribution

Active Publication Date: 2008-10-01
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are complicated in process, time-consuming, highly reactive, difficult to produce in batches, and the quality stability of their products is also poor, so it is difficult to realize industrial application

Method used

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  • Preparation for monodisperse, argentic sulfide and silver selenide nanocrystal
  • Preparation for monodisperse, argentic sulfide and silver selenide nanocrystal
  • Preparation for monodisperse, argentic sulfide and silver selenide nanocrystal

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preparation example Construction

[0015] A method for preparing monodisperse silver nanocrystals, which specifically includes the following steps: putting 0.1 g to 1 g of silver nitrate into 10 ml of octadecylamine solvent, and reacting at a temperature of 160° C. to 300° C. for 1 to 10 minutes ; After the reaction precipitate is washed with ethanol, it is dried at a temperature of 40° C. to 80° C. to obtain monodisperse silver nanocrystals with a particle size of 6 to 12 nanometers.

[0016] The chemical equation of the above reaction is as follows:

[0017]

[0018] see figure 1 Transmission electron microscope (TEM) photographs of monodisperse silver nanocrystals prepared for the examples of the present invention.

[0019] A method for preparing monodisperse silver sulfide nanocrystals, comprising the following steps: putting 0.1 gram to 1 gram of silver nitrate into 10 milliliters of octadecylamine solvent, and reacting at a temperature of 160°C to 300°C for 1 to 10 minutes ; Put the sulfur powder int...

Embodiment 1

[0032] Take 10 milliliters (ml) of octadecylamine and heat it to 200°C, add 1 gram (g) of silver nitrate solid to it, keep it at 200°C for 10 minutes, wash the precipitate obtained by the reaction with ethanol, Dry at a temperature of 80° C. to obtain monodisperse silver nanocrystals with a particle size of 4.7 nm.

Embodiment 2

[0034] Take 10ml of octadecylamine and heat it to 200°C, add 0.85g of silver nitrate solid into it, keep it at 200°C for 10 minutes, and then add 0.08g of sulfur powder to react for 10 minutes. The precipitate obtained from the reaction is washed with ethanol and dried at a temperature of 40° C. to 80° C. to obtain monodisperse silver sulfide nanocrystals with a particle size of 7.3 nanometers.

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Abstract

The invention relates to a method for preparing monodisperse silver nanocrystals. The method of the invention comprises the steps that (1) 0.1 to 1g silver nitrate is added into 10 ml. octadecylamine solvent to react for 1 to 10 min; (2) sediments after the reaction are washed by ethanol and then dried to obtain the monodisperse silver nanocrystals. In the step (1) of the preparation method, sulphur powder can be further added into the reaction system to continue to react for 8 to 12 min so as to obtain the monodisperse silver sulfide nanocrystals or selenium powder can be further added into the reaction system to continue to react for 8 to 12 min so as to obtain the monodisperse silver selenide nanocrystals. The method for preparing the monodisperse silver nanocrystals, the monodisperse silver sulfide nanocrystals and the monodisperse silver selenide nanocrystals provided by the invention is suitable for large-scale industrial production and has quite broad market prospect.

Description

technical field [0001] The invention relates to a preparation method of silver, silver sulfide and silver selenide, in particular to a preparation method of monodisperse silver, silver sulfide and silver selenide nanocrystals. Background technique [0002] Nano-sized metallic silver particles are widely used in sensors, catalysis, nanodevices, optical switches, etc. due to their unique optical, electrical, and catalytic properties. For example, nano-silver particles have a strong ability to enhance surface Raman spectroscopy (SERS), and are widely used in Raman spectroscopy to detect catalytic reactions in situ. [0003] Silver sulfide and silver selenide are semiconductor materials with high chemical stability and good photoelectric and thermoelectric properties. They have been widely used in manufacturing industries such as photovoltaic cells, photoconductive elements, infrared detectors, and fast ion conductors. When the particle size of silver sulfide and silver selenid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/22C01B19/04B22F9/30B22F1/054
CPCC01B19/007B22F1/0018B22F9/24B22F2998/00B82Y30/00C01G3/12C01P2002/72C01P2004/04C01P2004/32C01P2004/52C01P2004/64B22F1/054B22F2301/255B22F2304/054
Inventor 李亚栋王定胜
Owner TSINGHUA UNIV
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