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Silver nano triangle protection method based on ferrous ions

A ferrous ion, silver nanotechnology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of large environmental pollution, cumbersome steps, time-consuming and labor-intensive, etc. Process time saving effect

Active Publication Date: 2020-08-11
HANGZHOU TINKER BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these technical methods have had a good effect on the protection of silver nanotriangles, due to their disadvantages such as large environmental pollution, cumbersome steps, time-consuming and labor-consuming, it has led to the development of a fast, simple and environmentally friendly silver nanotriangle. Protection method is very important

Method used

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  • Silver nano triangle protection method based on ferrous ions
  • Silver nano triangle protection method based on ferrous ions
  • Silver nano triangle protection method based on ferrous ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Antioxidant effect of silver nanotriangles protected by ferrous ions:

[0041] Place the silver nanotriangular solution obtained in step 1 and step 2 at room temperature respectively, sample every 24 h, and record the change of the maximum absorption peak of the two samples with the standing time, the results are as follows: image 3 square curve. From image 3 It can be seen from the figure that the silver nanotriangles are very unstable at room temperature. After being placed for 1 day, the wavelength blue-shifted by about 30nm, and after 16 days, the maximum wavelength blue-shifted was 60nm, and the color of the solution gradually changed from blue to purple. while adding Fe 2+ The silver nanotriangular system such as image 3 As shown by the dot curve of 2+ The presence of can effectively avoid the oxidative ablation of silver nanotriangles at room temperature.

Embodiment 2

[0043] Research on the protective effect of ferrous ions on silver nanotriangles under different chloride ion concentrations:

[0044] (1) Take 750 μL of the silver nanotriangles prepared in step 1, add ultrapure water to dilute, mix with different concentrations of chloride ion solutions (the final concentration of chloride ions ranges from 20 to 2000 μM), and incubate for 5 minutes to ensure that the total The volume is 3mL, and the absorption peak at the wavelength of 300nm to 900nm is measured by ultraviolet-visible spectrophotometry, and the blue shift value Δλ of the wavelength is calculated, and the concentration of chloride ions is used as the abscissa, and the blue shift value of the wavelength Δλ is used as the ordinate to draw a curve.

[0045] (2) Take 750 μL of the silver nanotriangles treated in step 2, add ultrapure water to dilute and mix with different concentrations of chloride ion solutions (the final concentration of chloride ions is in the range of 20-2000 ...

Embodiment 3

[0047] Research on the protective effect of ferrous ions on the silver triangle under different concentrations of bromide ions:

[0048] (1) Take 750 μL of the silver nanotriangles prepared in step 1, add ultrapure water to dilute and mix with different concentrations of bromide ion solutions (the final concentration of bromide ions is in the range of 2-160 μM, and the bromide ion solution in step (1) The concentration of the ionic solution is the same as the concentration of the ionic solution), mix and incubate for 5min to ensure that the total volume is 3mL, use UV-visible spectrophotometry to measure the absorption peak at a wavelength of 300nm to 900nm, and calculate the wavelength blue shift value Δλ, taking the concentration of bromide ion as the abscissa , and the wavelength blue shift value Δλ is plotted as the ordinate.

[0049] (2) Take 750 μL of the silver nanotriangles treated in step 2, add ultrapure water to dilute, and then mix with different concentrations of ...

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Abstract

The invention relates to a silver nano triangle protection method based on ferrous ions. The method comprises the following steps that a silver nano triangle sheet is prepared and refrigerated and stored; and a ferrous ion solution is added into the silver nano triangle sheet prepared in the step 1, after sufficient mixing and incubation, centrifuging and washing are conducted, solid precipitatesare dispersed into an aqueous solution again, and a silver nano triangle aqueous solution is obtained. According to the silver nano triangle protection method based on the ferrous ions, the stabilityof a silver nano triangle in a complex system is improved while the silver nano triangle is protected rapidly, easily and conveniently in an environment-friendly mode.

Description

technical field [0001] The invention relates to a method for protecting silver nano triangles based on ferrous ions. Background technique [0002] Silver nanotriangular sheets (also known as triangular silver nanoprisms) play a pivotal role in the field of silver nanomaterials. Silver nanotriangular sheets not only have the properties common to conventional nanoparticles, but also have anisotropy, high surface activity, and excellent dielectric constant properties. Because of its unique active tip and high sensitivity to the external environment, silver nanotriangles have a wide range of applications in the analysis and detection of inorganic ions, small molecule detection, surface-enhanced Raman, biological diagnosis and treatment, and antibacterial properties. [0003] At present, most of the detections based on silver nanotriangles utilize its highly active tip to build various sensing platforms. The detection method based on silver nanotriangles is mainly detected from...

Claims

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Application Information

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IPC IPC(8): B22F1/02B22F1/00
CPCB22F1/0551B22F1/07B22F1/054B22F1/16
Inventor 盖宏伟吕适宗成华于洋
Owner HANGZHOU TINKER BIOTECHNOLOGY CO LTD
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