Manufacturing method and application of silver nano cubic particle

A silver nanometer and cubic technology, applied in the field of nanomaterials, can solve problems such as difficulty in large-scale synthesis, complex preparation process, and difficult adjustment of experimental conditions, and achieve the effects of low production cost, simple process and good application prospects.

Inactive Publication Date: 2018-08-31
JIANGHAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the many silver micro-nano structures, the silver micro-nano structure of silver cubes has attracted widespread attention. However, ther

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  • Manufacturing method and application of silver nano cubic particle
  • Manufacturing method and application of silver nano cubic particle

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preparation example Construction

[0022] The invention solves the defects of the existing silver nanocube preparation method by providing a preparation method and application of the silver nanocube.

[0023] In order to solve the above defects, the main ideas of the embodiments of the present invention are:

[0024] The preparation method of the silver nanocube of the embodiment of the present invention comprises the following steps:

[0025] 1) Heating ethylene glycol with magnetic stirring at 200-300rpm for 1-3h;

[0026] 2) adding sulfide salt and polyvinylpyrrolidone to the ethylene glycol treated in step 1) respectively to obtain 2-4mM sulfide salt ethylene glycol solution and 2-4mM polyvinylpyrrolidone ethylene glycol solution;

[0027] 3) under stirring, the sulfide salt ethylene glycol solution and polyvinylpyrrolidone ethylene glycol solution are added dropwise and mixed to obtain a reaction solution;

[0028] 4) adding silver nitrate to the ethylene glycol treated in step 1) to obtain a 40-50 mg / mL...

Embodiment 1

[0039] The preparation method of the silver nanocomposite material of the embodiment of the present invention comprises the following steps:

[0040] (1) Weigh 12ml of ethylene glycol into a 25ml reactor, heat it with magnetic stirring at 280rpm for 1h, and heat to 140°C.

[0041] (2) Prepare 3mM sodium sulfide ethylene glycol solution and 3mM polyvinylpyrrolidone ethylene glycol solution.

[0042] (3) Measure 3ml of polyvinylpyrrolidone ethylene glycol solution and add it to the reactor, then use a pipette to pipette and add 160ul of sodium sulfide ethylene glycol solution, which can be done in small quantities for several times, and the magnetic stirrer speed is 280rpm. , to obtain the reaction solution. Wherein, the molecular weight of the polyvinylpyrrolidone is 40000.

[0043] (4) Prepare 2 mL of silver nitrate ethylene glycol solution with a concentration of 48 mg / mL, add it to the reaction solution in step (3), stir at 280 rpm for 8 min, and when the color turns reddi...

Embodiment 2

[0047] The preparation method of the silver nanocomposite material of the embodiment of the present invention comprises the following steps:

[0048] (1) Weigh 12ml of ethylene glycol into a 25ml reactor, heat it with magnetic stirring at 300rpm for 3h, and heat to 130°C.

[0049] (2) Prepare 4mM sodium sulfide ethylene glycol solution and 4mM polyvinylpyrrolidone ethylene glycol solution.

[0050] (3) Measure 3ml of polyvinylpyrrolidone glycol solution and add it to the reactor, then use a pipette to pipette and add 160ul of sodium sulfide glycol solution, which can be done in small quantities for several times, and the magnetic stirrer speed is 300rpm. , to obtain the reaction solution. Wherein, the molecular weight of the polyvinylpyrrolidone is 29000.

[0051] (4) Prepare 2 mL of silver nitrate ethylene glycol solution with a concentration of 50 mg / mL, add it to the reaction solution in step (3), and stir at 300 rpm for 15 min. When the color turns reddish brown, the react...

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Abstract

The invention provides a preparation method and application of a silver nano cubic particle. The preparation method comprises the following steps of: 1) magnetically stirring and heating ethylene glycol for 1-3 hours at rotation speed being 200-300 rpm; 2) separately adding sulfide salt and polyvinylpyrrolidone into the ethylene glycol treated in step 1), thereby obtaining a 2-4 mM sulfide salt ethyl glycol solution and a 2-4 mM polyvinylpyrrolidone ethyl glycol solution; 3) under the stirring state, mixing the sulfide salt ethyl glycol solution with the polyvinylpyrrolidone ethyl glycol solution after dropwise adding to obtain a reaction solution; 4) adding silver nitrate into ethyl glycol treated in step 1) to obtain 40-50 mg/mL of silver nitrate ethyl glycol solution; and 5) under the stirring state, adding the silver nitrate ethyl glycol solution into the reaction solution in the step 3), and ending reaction when color of the reaction solution is changed to be red brown, thereby obtaining the silver nano cubic particle. The silver nano cubic particle prepared by the method is controllable in morphology, is stable in structure, and has very high activity in aspect of SERS.

Description

technical field [0001] The invention belongs to the field of nanomaterials, in particular to a preparation method and application of silver nanocubes. Background technique [0002] Surface enhanced Raman scattering (Surface enhanced Raman Scattering, SERS) technology is widely used in the detection of ultra-low concentration molecules, the orientation and conformation of macromolecules or small molecules, and the chemical phase state of composite materials. An important tool for phase structure. Previous studies have shown that the surface morphology of metals is one of the important factors affecting the SERS effect. Therefore, the research on metal substrates that can be used for SERS effects mainly focuses on the synthesis and control of the size and shape of metal nanoparticles. Due to its good physical, chemical and optical properties, silver nanostructure is a commonly used matrix for SERS to study various physical and chemical problems. Among the numerous silver mic...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00G01N21/65
CPCB22F9/24B82Y40/00G01N21/658
Inventor 胡成龙张行颖陈韶云
Owner JIANGHAN UNIVERSITY
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