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Gold-based silver ball surface enhancing material and method for detecting furfural in transformer oil

A reinforced material and surface enhanced technology, which is applied in metal material coating technology, analytical materials, material excitation analysis, etc., can solve the problems of weak relative strength, low furfural content, complex composition, etc., and achieve the effect of improving sensitivity

Pending Publication Date: 2019-07-16
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the complex composition and low furfural content in the operating transformer oil, the relative intensity of the Raman signal of dissolved furfural molecules in the oil is weak

Method used

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  • Gold-based silver ball surface enhancing material and method for detecting furfural in transformer oil
  • Gold-based silver ball surface enhancing material and method for detecting furfural in transformer oil
  • Gold-based silver ball surface enhancing material and method for detecting furfural in transformer oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Preparation of gold-based silver ball surface reinforcement material

[0021] The preparation of gold-based silver sphere surface reinforcement materials generally includes three steps: (1) synthesis of silver sol solution; (2) modification of the gold film surface; and, (3) assembly of silver nanoparticles on the gold film surface. details as follows.

[0022] (1) Synthetic silver sol solution

[0023] After 200ml concentration of 1mM silver nitrate aqueous solution is heated to boiling, add a volume of silver nitrate aqueous solution volume 1 / 50 (i.e., 4ml) with a mass fraction of 1% sodium citrate aqueous solution, continue heating for 1h to keep the solution in a boiling state, The color of the solution gradually changed from colorless and transparent to milky white and slightly green.

[0024] (2) modify the surface of the gold film

[0025] A gold film with a thickness of 100 nm and a size of 0.5 cm × 0.5 cm was ultrasonicated in deionized water...

Embodiment 2

[0029] Example 2: Raman in situ detection of dissolved furfural in oil

[0030] Using the gold-based silver sphere surface enhancement material prepared in Example 1 as the surface enhancement base material, the furfural in the transformer oil is detected through the confocal Raman spectrum detection platform, and the furfural dissolved in the oil is obtained. The Raman spectrum of furfural is determined to determine the characteristic peak of furfural .

[0031] The confocal Raman spectroscopy detection platform is composed of excitation light source module, filter module, optical path guidance system, spectrometer and detector, such as image 3 shown.

[0032] The excitation light source is mainly used to provide Raman scattered light with a narrow linewidth, and used as incident light to excite the Raman scattered light of the material. The excitation light source of the confocal Raman spectroscopy detection platform used in this example selected Cobolt Company 04-01Sam...

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Abstract

The invention discloses a gold-based silver ball surface enhancing material. The gold-based silver ball surface enhancing material is prepared by assembling silver nanoparticles on the surface of a gold membrane by using 4-aminthiophenol as a coupling agent through a chemical preparation method. The method comprises the following steps that (1) a silver sol solution is synthesized, wherein a 1 mMsilver nitrate water solution is heated until boiling, a sodium citrate aqueous solution with the mass fraction of 1% is added, and heating is carried out continuously for 1 hour to keep the solutionin a boiling state; (2) modification is carried out on the gold membrane, wherein ultrasonic treatment is carried out correspondingly on the gold membrane in deionized water and absolute ethyl alcoholfor 20 minutes, then the gold membrane is dried by using nitrogen at room temperature, then the mixture is put into an ethanol solution of 4-aminothiophenol at room temperature, depositing is carriedout for 4-10 hours, taking out is carried out, and washing is carried out to remove 4-aminthiophenol molecules with no combination on the surface; and (3), assembling the silver nano-particles on thesurface of the gold membrane, wherein the modified gold membrane is dried by nitrogen and then is placed in a silver sol solution for soaking for at least 10 hours, and then washing and drying are carried out by using nitrogen at room temperature for later use.

Description

technical field [0001] The invention belongs to the field of on-line monitoring and fault diagnosis of electrical equipment insulation, and specifically relates to a gold-based silver ball surface reinforcement material and a detection method for furfural in transformer oil using the gold-base silver ball surface reinforcement material as a surface reinforcement base material. Background technique [0002] During the long-term operation of the transformer, due to the influence of temperature, electric field, moisture, oxygen and other factors, the cellulose chains in the insulating paper are broken to form furan derivatives, which are dissolved in the transformer oil, and the furfural content is the highest, which is currently the most important factor in evaluating oil-paper insulation. One of the most commonly used indicators of aging. [0003] Surface-enhanced Raman spectroscopy (Surface-enhanced Raman Scattering, SERS) technology is one of the most commonly used methods ...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00C23C26/00G01N21/65
CPCB22F9/24C23C26/00G01N21/658G01N2021/655B22F2009/245B22F1/065B22F1/054
Inventor 万福陈伟根杨定坤史海洋黄映洲周炜然谭亚雄王有元杜林李剑黄正勇王飞鹏周湶张束桦
Owner CHONGQING UNIV
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