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Tin sulfide/gold nanoparticle composite and its preparation method and application

A technology of gold nanoparticles and stannous sulfide, which is applied in the direction of nanotechnology, nanotechnology, metal processing equipment, etc., can solve problems such as inability to orderly assemble gold nanoparticles, and achieve superior performance, environmental friendliness, and high stability.

Active Publication Date: 2019-09-10
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The synthesis of gold nanoparticles generally adopts the method of solution chemical reduction, such as using ethylene glycol or sodium borohydride as a reducing agent, but this method cannot make the orderly assembly of gold nanoparticles on the substrate material

Method used

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  • Tin sulfide/gold nanoparticle composite and its preparation method and application
  • Tin sulfide/gold nanoparticle composite and its preparation method and application
  • Tin sulfide/gold nanoparticle composite and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A self-assembly method for stannous sulfide-induced growth of gold nanoparticles, the steps are as follows:

[0021] (1) Mechanical stripping to obtain stannous sulfide, with a thickness of about 70 nm and a size of a few microns to more than ten microns, annealed in an argon atmosphere for later use;

[0022] (2) Dissolve the chloroauric acid powder in water to obtain a 26% chloroauric acid aqueous solution, drop 2 μm of the chloroauric acid aqueous solution onto the surface of the mechanically stripped stannous sulfide, deposit for 2 min, blow off the excess liquid with nitrogen, Subsequently, the reaction temperature in the oven was 150°C and the reaction time was 5 min;

[0023] (3) After the reaction, quickly take out the sample to obtain gold nanoparticles self-assembled in stannous sulfide. The gold nanoparticles are about 15-25 nanometers in size and have good crystallinity.

Embodiment 2

[0025] A self-assembly method for stannous sulfide-induced growth of gold nanoparticles, the steps are as follows:

[0026] (1) The stannous sulfide material is obtained by mechanical stripping, the thickness is about 85 nm, and the size is several microns to more than ten microns, and it is annealed in an argon atmosphere for later use;

[0027] (2) Dissolve the chloroauric acid powder in water, dilute it to obtain a 13% chloroauric acid aqueous solution, drop 3 μm of chloroauric acid aqueous solution onto the surface of the mechanically stripped stannous sulfide, deposit for 3 minutes, and blow off the excess liquid with nitrogen gas , and then the reaction temperature in the oven was 120°C and the reaction time was 5 min;

[0028] (3) After the reaction, quickly take out the sample to obtain gold nanoparticles self-assembled in stannous sulfide. The gold nanoparticles are about 10-15 nanometers in size and have good crystallinity.

Embodiment 3

[0030] A self-assembly method for stannous sulfide-induced growth of gold nanoparticles, the steps are as follows:

[0031] (1) The stannous sulfide material is obtained by mechanical stripping, the thickness is about 100 nm, and the size is several microns to more than ten microns, and it is annealed in an argon atmosphere for later use;

[0032] (2) Dissolve the chloroauric acid powder in water, dilute it to obtain a 19% chloroauric acid aqueous solution, drop 2 μm of the chloroauric acid aqueous solution onto the surface of the mechanically stripped stannous sulfide, deposit for 4 minutes, and blow off the excess liquid with nitrogen gas , and then the reaction temperature in the oven was 130°C and the reaction time was 3 min;

[0033] (3) After the reaction, quickly take out the sample to obtain gold nanoparticles self-assembled in stannous sulfide. The gold nanoparticles are about 8-12 nanometers and have good crystallinity.

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Abstract

The invention discloses a stannous sulfide / gold nanoparticle composite and its preparation method and application. The preparation method is: mechanically stripping the stannous sulfide material, the thickness of the product is 50-100 nm, the size is several microns to more than ten microns, and the Standby after annealing; drop chloroauric acid aqueous solution onto the surface of mechanically stripped tin sulfide, deposit for 2‑5 min, blow off excess liquid with nitrogen, and react for 2‑5 at 120‑150 °C; after the reaction, quickly take out the sample, The obtained gold nanoparticles are assembled in the self-orientation of stannous sulfide, and the obtained gold nanoparticles have a size of tens of nanometers and good crystallinity, and have broad and important application prospects in the fields of photodetection devices, biosensing and the like.

Description

technical field [0001] The invention relates to a self-assembly method for stannous sulfide-induced growth of gold nanoparticles, belonging to the field of nanomaterial preparation. Background technique [0002] Tin sulfide is a P-type semiconductor with excellent performance. It has a wide range of applications in many fields and can be used as transistors, sensors, solar cells, switches, battery electrodes, etc. Different from zero-gap semiconductors such as graphene, stannous sulfide has a band gap, which is an indirect band gap, and its band gap has an important relationship with the number of atomic layers. The thinner the layer, the larger the band gap. Also different from transition metal 2D materials such as molybdenum disulfide, stannous sulfide has an indirect band gap from the bulk to the monolayer. However, there are few reports on the preparation method of the composite of stannous sulfide and gold nanoparticles. [0003] The synthesis of gold nanoparticles ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02B22F9/24G01J1/42B82Y30/00B82Y40/00
CPCG01J1/42B82Y30/00B82Y40/00B22F9/24B22F1/07B22F1/054B22F1/17
Inventor 晏善成宋海增徐欣王俊吴建盛
Owner NANJING UNIV OF POSTS & TELECOMM
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