Synthetic method of load type floriform silver nanostructured material

A structural material, silver nanotechnology, applied in the field of synthesis of nanostructured materials, can solve problems affecting product performance, complex synthesis steps, and restrictions on the synthesis of nanostructured materials in large quantities, to achieve convenient application, simple equipment, and good industrial application foreground effect

Inactive Publication Date: 2008-12-17
NANJING UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of templates, surfactants, and functionalization to modify the electrode surface often affects the performance of the product, complicates the synthesis steps, or limits the large-scale synthesis of nanostructured materials.
There is currently no dedicated preparation method, especially one-step synthesis of large-area supported flower-like silver nanostructure materials and effective control of their size and microstructure, without the need for any templates, additives, and electrode surface modification.

Method used

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  • Synthetic method of load type floriform silver nanostructured material
  • Synthetic method of load type floriform silver nanostructured material
  • Synthetic method of load type floriform silver nanostructured material

Examples

Experimental program
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Effect test

preparation example Construction

[0022] The preparation device of the loaded flower-shaped silver nanostructure material: including a precision DC power supply with stable voltage and current, an iron stand for fixing two electrodes, and a rectangular plastic tank with a size of 5cm (length) × 3cm (width) × 0.5cm (thickness), two electrodes are fixed on both sides of the electrolytic cell, so the distance between them is 30-40mm, and the whole circuit is connected by copper wire.

[0023] First, configure a certain concentration of silver salt electrolyte (the present invention adopts AgNO 3 , analytically pure), and measure a certain volume of solution and pour it into the electrolytic cell; insert the two prepared electrodes into the electrolytic cell and fix them; in the constant voltage (set a certain voltage) mode, pass through the direct current to react for a certain period of time At this time, electrodeposition products will be formed on the surface of the negative electrode; the negative electrode i...

Synthetic example

[0043] An example is as follows: under appropriate conditions (total voltage (V), silver ion concentration (C) and deposition time (t) are 3mM, 80mV and 10min, respectively), silver nanostructure materials were prepared on the surface of cathode PFE. Scanning electron microscope analysis (SEM) was used to observe the product directly (no need to spray gold), and the results are as follows: figure 2 shown. Low magnification SEM images ( figure 2 a) shows that a large number of particles are evenly distributed on the surface of the platinum film substrate, and the product achieves a large-area distribution. figure 2 b shows that the particles have a flower-like morphology with a diameter between 9–11 μm. SEM pictures with higher magnification ( figure 2 c) The detailed morphology of the flower-like nanostructure is revealed. It can be seen that the flower-like nanostructure is constructed by two-dimensional nanosheets, and the nanosheets cross each other. This flower-lik...

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Abstract

The invention discloses a synthesizing method of a loading flower-shaped nano silver structural material, which is characterized in that a silver plate with high purity is taken as an anode, a platinum film electrode is taken as a cathode, a silver nitrate solution with the concentration of 0.003 to 0.01 mol / L is taken as an electrolytic solution, and the volume of the electrolytic solution is 20 to 100 mL; the range of constant voltage is adjusted to be 50 to 200 mV during electrolytic deposition, and the time of the electrolytic deposition lasts for 2 to 15 minutes; the cathode of the loading nano silver structural material is repeatedly rinsed by deionized water after the reaction, and then dried in nitrogen. The synthesizing method of the loading flower-shaped nano silver structural material realizes the growth anisotropy of crystal, leads the size and the microstructure of the nano metallic structure to be controllable, does not need any addition agent and electrode surface modification, and achieves simple control of appropriate voltage and concentration of the electrolytic solution; the synthesizing method is ultra-simple, and has convenient operation, easy-separated products and high purity and well industrial application prospect.

Description

technical field [0001] The invention relates to a method for synthesizing nanostructured materials, especially to achieve one-step synthesis of silver nanostructured materials with special morphology and microstructure on the surface of a substrate. This special silver nanostructured material exhibits strong micro-region surface-enhanced Raman scattering effect. Background technique [0002] It is a very hot topic in the field of nanotechnology research to assemble nanoscale tiny units into regular and ordered structures. Through this "bottom-up" approach, we can not only broaden the application range of nanofunctional materials, but also successfully realize the deviceization of nanomaterials. In recent years, due to the very unique physical and chemical properties of silver nanostructured materials, they have promising applications in fields such as optics, catalysis, surface-enhanced Raman scattering (SERS), and chemical biosensing. Hierarchical silver nanostructures co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/46
Inventor 孟祥康唐少春陈延峰
Owner NANJING UNIV
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