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A method for preparing surface-enhanced infrared spectroscopy cobalt substrate

An infrared spectroscopy and surface enhancement technology, applied in the field of surface enhanced infrared spectroscopy, can solve the problems of high cost of substrate preparation, insignificant enhancement effect, affecting the test results of surface enhanced infrared spectroscopy, etc. The effect of promoting the application

Inactive Publication Date: 2016-03-30
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the existing nanoparticles that constitute the substrate are prepared by sol-gel and other methods in the solution, and organic matter as a stabilizer is needed in the process. The organic matter will affect the surface-enhanced infrared spectroscopy test results, and the preparation cost of the existing substrate is high. , the enhancement effect is not significant

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  • A method for preparing surface-enhanced infrared spectroscopy cobalt substrate
  • A method for preparing surface-enhanced infrared spectroscopy cobalt substrate
  • A method for preparing surface-enhanced infrared spectroscopy cobalt substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Preparation of Surface Enhanced Infrared Spectroscopy Cobalt Substrate

[0029] Clean the surface of the aluminum sheet first, and roughen the cleaned aluminum sheet for 60 seconds in an aqueous sodium hydroxide solution with a mass concentration of 0.5%; wash the roughened aluminum sheet with ultrapure water, and then put it into a 0.2M cobalt nitrate solution In the process, aluminum and cobalt ions undergo a substitution reaction, and the reaction time is about 12 hours, and then cleaned with ultrapure water, and then dried with nitrogen, so that a surface-enhanced infrared spectrum cobalt substrate is obtained.

[0030] attached figure 1 The TEM image of the above-mentioned surface-enhanced infrared spectroscopy cobalt substrate shows that the cobalt island film of the substrate is densely packed, the nano-cobalt particles that constitute the cobalt island film of the substrate exist independently, and the aggregate cobalt island film composed of cobalt p...

Embodiment 2

[0032] Example 2: Preparation of Surface Enhanced Infrared Spectroscopy Cobalt Substrate

[0033] Clean the surface of the aluminum sheet first, and roughen the cleaned aluminum sheet for 55 seconds in an aqueous solution of sodium hydroxide with a mass concentration of 0.8%; wash the roughened aluminum sheet with ultrapure water, and then put it into a 0.3M cobalt nitrate solution In the method, aluminum and cobalt ions undergo a substitution reaction, and the reaction time is about 14 hours, and then cleaned with ultrapure water, and then dried with nitrogen, so that a surface-enhanced infrared spectrum cobalt substrate is obtained.

[0034] Put the above-mentioned surface-enhanced infrared spectrum cobalt base into 1mM ethanol solution of p-pyridine and soak for 6 hours; use the cobalt substrate adsorbed with p-pyridine to measure the reflection infrared spectrum of p-pyridine, the test results are shown in the attached Figure 4 , it can be seen that the characteristic peak ...

Embodiment 3

[0035] Example 3: Preparation of Cobalt Substrate for Surface Enhanced Infrared Spectroscopy

[0036] Clean the surface of the aluminum sheet first, and roughen the cleaned aluminum sheet for 60 seconds in an aqueous sodium hydroxide solution with a mass concentration of 0.5%; wash the roughened aluminum sheet with ultrapure water, and then put it into a 0.2M cobalt nitrate solution In the process, aluminum and cobalt ions undergo a substitution reaction, and the reaction time is about 12 hours, and then cleaned with ultrapure water, and then dried with nitrogen, so that a surface-enhanced infrared spectrum cobalt substrate is obtained.

[0037] Put the above-mentioned surface-enhanced infrared spectrum cobalt substrate into 1mM ethanol solution of p-aminobenzoic acid and soak for 6 hours; use the cobalt substrate adsorbed with p-aminobenzoic acid to measure the reflection infrared spectrum of p-aminobenzoic acid, the test results are shown in the attached Figure 5 , it can b...

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Abstract

The invention discloses a method for preparing a surface-enhanced infrared spectroscopy cobalt substrate. The method comprises the following steps: placing a roughed aluminum sheet into a cobalt nitrate solution, and adhering the cobalt to the aluminum surface through the replacement reaction of the aluminum and the cobalt ions to obtain the surface-enhanced infrared spectroscopy cobalt substrate, wherein no organic substance is used during preparation. The prepared substrate is pure without impurity, and thus the phenomenon that the infrared testing result is disturbed by the organic substance in an existing substrate is avoided, the enhanced effect of the prepared cobalt substrate is remarkable, the substrate is good in reproducibility and high in sensitivity, the raw materials in the preparation method are easily available, all reactions are performed at the room temperature, the reaction condition is mild, the reaction time is short, the equipment requirement is low, the manufacturing cost is low, and the method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of surface-enhanced infrared spectroscopy, and in particular relates to a method for preparing a cobalt substrate for surface-enhanced infrared spectroscopy. Background technique [0002] Infrared spectroscopy, like Raman spectroscopy, belongs to molecular vibration spectroscopy, which can reflect the characteristic structure of molecules. However, the Raman scattering effect is a very weak process, and generally its light intensity is only about 10 of the incident light intensity. -10 , so the Raman signals are very weak, and some kind of enhancement effect is almost always used in the Raman spectroscopy study of surface adsorbed species. Although the research based on surface-enhanced Raman spectroscopy can provide structural information, it can only give information on the structural changes of molecular groups due to the limitation of resonance conditions. Infrared spectroscopy can provide the vibratio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/3563
Inventor 闫月荣郑军伟马娟周群李晓伟张艳青褚文娅李双双赵伟
Owner SUZHOU UNIV