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Preparation method of silver sulfide nanocrystal

A technology of nanocrystals and silver sulfide, applied in chemical instruments and methods, nanotechnology, inorganic chemistry, etc., can solve the problems of poor uniformity of particle size distribution of silver sulfide nanocrystals, and achieve good dispersion stability

Active Publication Date: 2021-04-30
SUZHOU XINGSHUO NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned technical problems, the application provides a method for preparing silver sulfide nanocrystals to solve the problem of poor uniformity of particle size distribution of silver sulfide nanocrystals synthesized by existing common methods

Method used

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  • Preparation method of silver sulfide nanocrystal
  • Preparation method of silver sulfide nanocrystal
  • Preparation method of silver sulfide nanocrystal

Examples

Experimental program
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Embodiment 1

[0028] Embodiment 1 provides a preparation method of silver sulfide nanocrystals, comprising: dissolving 1 g of silver nitrate in 100 g of glycerin to form a first system. Add 25g of mercaptopropionic acid into the first system to obtain a reaction system, and react at 140° C. for 5 minutes to obtain silver sulfide nanocrystals. The water content in the above reaction system is about 0.1 wt%. At 25°C, the viscosity of glycerin is about 56mPa.s.

[0029] figure 1 It is the TEM figure of the silver sulfide nanocrystal that embodiment 1 prepares. from figure 1 It can be seen that the particle size distribution of the prepared silver sulfide nanocrystals is uniform.

[0030] figure 2 It is the ultraviolet absorption-fluorescence emission spectrogram of the silver sulfide nanocrystal prepared in embodiment 1. from figure 2 It can be seen that the absorption peak of the prepared silver sulfide nanocrystals is at about 805 nm, and the emission peak is at about 887 nm.

Embodiment 2

[0032] The preparation method of silver sulfide nanocrystals in Example 2 is the same as that of Example 1, except that the alcohol is 1,4-butanediol, thereby preparing silver sulfide nanocrystals. At 25 degrees Celsius, the viscosity of 1,4-butanediol is about 45mPa.s.

[0033] image 3 It is the TEM figure of the silver sulfide nanocrystal that embodiment 2 prepares. from image 3 It can be seen that the particle size distribution of the prepared silver sulfide nanocrystals is uniform.

[0034] Figure 4 It is the ultraviolet absorption-fluorescence emission spectrogram of the silver sulfide nanocrystal prepared in embodiment 2. from Figure 4 It can be seen that the prepared silver sulfide nanocrystals have no obvious absorption peak, and the emission peak is about 873nm.

Embodiment 3

[0036] The preparation method of silver sulfide nanocrystals in Example 3 is the same as that of Example 1, except that the alcohol is 1,2-propanediol, thereby preparing silver sulfide nanocrystals. At 25 degrees Celsius, the viscosity of 1,2-propanediol is about 51mPa.s.

[0037] Figure 5 It is the TEM figure of the silver sulfide nanocrystal that embodiment 3 prepares. from Figure 5 It can be seen that the particle size distribution of the prepared silver sulfide nanocrystals is uniform.

[0038] Image 6 It is the ultraviolet absorption-fluorescence emission spectrogram of the silver sulfide nanocrystal prepared in embodiment 3. from Image 6 It can be seen that the prepared silver sulfide nanocrystals have no obvious absorption peak, and the emission peak is about 861nm.

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Abstract

The application provides a method for preparing silver sulfide nanocrystals, the preparation method comprising: a first step, preparing a reaction system with a silver compound, a mercapto carboxylic acid and an alcohol; a second step, preparing the reaction system at a predetermined temperature react to obtain silver sulfide nanocrystals; at 25° C., the viscosity of the alcohol is 30-80 mPa.s. The present application can quickly prepare silver sulfide nanocrystals with good particle size distribution uniformity and high water phase dispersion stability.

Description

technical field [0001] The application belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing silver sulfide nanocrystals. Background technique [0002] Silver sulfide nanocrystals are an ideal near-infrared material. Silver sulfide nanocrystals exhibit excellent fluorescence properties in the wavelength range of 800-1400nm, and can be widely used in biological or cell imaging. [0003] However, the particle size distribution uniformity of the silver sulfide nanocrystals prepared by the commonly used aqueous phase synthesis method is poor, so it is not used. Contents of the invention [0004] In view of the above technical problems, the present application provides a method for preparing silver sulfide nanocrystals to solve the problem of poor uniformity of particle size distribution of silver sulfide nanocrystals synthesized by existing common methods. [0005] According to one aspect of the present application, a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/58B82Y40/00G01N21/64C01G5/00
CPCB82Y40/00C01G5/00C01P2002/80C01P2002/84C01P2004/04C09K11/582G01N21/6486
Inventor 李鑫王允军宋研君
Owner SUZHOU XINGSHUO NANOTECH CO LTD
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