Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Silver-plated optical fiber Raman probe as well as preparation method and application thereof

A technology of fiber Raman probe and silver light, which is applied in the field of materials, optics and environmental detection, to achieve the effect of good stability, ultra-high sensitivity detection and promotion of densification

Pending Publication Date: 2022-03-18
WUHAN UNIV OF TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the above Cr(VI) detection technology, the SERS optical fiber sensor can not only realize simple, fast and highly sensitive Cr(VI) detection, but also has the advantages of flexible, real-time, in-situ, long-distance and low-loss detection, greatly The Cr(VI) detection technology has been optimized, and there is currently no technology disclosure about the detection of Cr(VI) fiber optic probes or SERS fiber optic sensors

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Silver-plated optical fiber Raman probe as well as preparation method and application thereof
  • Silver-plated optical fiber Raman probe as well as preparation method and application thereof
  • Silver-plated optical fiber Raman probe as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of silver-plated optical fiber Raman probe, its preparation method comprises the following steps:

[0036] 1) Optical fiber sensitization pretreatment: sensitization treatment is performed by immersing a clean and dry silica optical fiber with a flat end face in 0.2 wt% stannous chloride aqueous solution for 3 minutes.

[0037] 2) Prepare the precursor solution: prepare 30ml of silver nitrate solution with a concentration of 0.067mol / L and 30mL of sodium bicarbonate solution with a concentration of 0.04mol / L, add 1.776g of polyvinylpyrrolidone after the silver nitrate is completely dissolved, and stir well , add the completely dissolved sodium bicarbonate solution, and continue to stir until uniform.

[0038] 3) Preparation of silver-coated optical fiber by solvothermal method: Pour the prepared precursor solution into a polytetrafluoroethylene autoclave, put the optical fiber in, seal the container, and react at 140° C. for 1 h. After the reaction was completed...

Embodiment 2

[0044] A kind of silver-plated optical fiber Raman probe, its preparation method comprises the following steps:

[0045] 1) Optical fiber sensitization pretreatment: sensitization treatment was performed by immersing a clean and dry silica optical fiber with a flat end face in 0.1 wt% stannous chloride aqueous solution for 1 min.

[0046] 2) Prepare the precursor solution: prepare 30ml of silver nitrate solution with a concentration of 0.01mol / L and 30mL of sodium bicarbonate solution with a concentration of 0.01mol / L, add 3.552g of polyvinylpyrrolidone after the silver nitrate is completely dissolved, and stir well , add the completely dissolved sodium bicarbonate solution, and continue to stir until uniform.

[0047] 3) Preparation of silver-coated optical fiber by solvothermal method: Pour the prepared precursor solution into a polytetrafluoroethylene autoclave, put the optical fiber in, seal the container, and react at 120° C. for 24 hours. After the reaction was complete...

Embodiment 3

[0053] Its preparation method of a silver-plated optical fiber Raman probe comprises the following steps:

[0054] 1) Optical fiber sensitization pretreatment: sensitization treatment is carried out by immersing a clean and dry silica optical fiber with a tapered end face in 2 wt % stannous chloride aqueous solution for 2 min.

[0055] 2) Prepare precursor solution: prepare 30ml of silver nitrate solution with a concentration of 0.5mol / L and 30mL of sodium bicarbonate solution with a concentration of 1mol / L, add 0g of polyvinylpyrrolidone after the silver nitrate is completely dissolved, stir well, add Dissolve the complete sodium bicarbonate solution and continue to stir until uniform.

[0056] 3) Preparation of silver-coated optical fiber by solvothermal method: Pour the prepared precursor solution into a polytetrafluoroethylene autoclave, put the optical fiber in, seal the container, and react at 160° C. for 8 hours. After the reaction was completed and cooled naturally, t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Average grain sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of material, optics and environment detection, in particular to a silver-plated optical fiber Raman probe as well as a preparation method and application thereof, and methimazole is adopted as a Raman signal molecule to realize Cr (VI) detection. According to the silver-plated optical fiber Raman probe disclosed by the invention, the methimazole functionalization is adopted, so that the ultra-sensitive detection of Cr (VI) and the excellent oxidation resistance are realized. The preparation method disclosed by the invention is simple in process, high in sensitivity, good in repeatability, good in stability and good in anti-interference performance, and by adopting a stannous chloride assisted solvothermal method, morphology regulation and control of the silver nanoparticles on the end face of the optical fiber and strong interface adhesion of the optical fiber and the silver nanomaterial are realized. Specifically, the stannous chloride pretreatment process promotes compact and uniform growth of silver nanoparticles on the end face of the optical fiber on one hand, and enhances interface adhesion of the optical fiber and the silver nanoparticles on the other hand. By adopting methimazole functionalization, ultra-sensitive detection and excellent oxidation resistance of Cr (VI) are realized.

Description

technical field [0001] The invention relates to the fields of materials, optics and environmental detection, in particular to a silver-plated optical fiber Raman probe and its preparation method and application. Background technique [0002] As a major environmental pollutant, hexavalent chromium ion is highly carcinogenic and mutagenic. In recent years, the detection equipment for hexavalent chromium ions in water is expensive, the sample pretreatment is complicated, and the test process is lengthy. Therefore, it is imminent to develop a rapid, high-sensitivity, and low-cost biological detection technology. Compared with commonly used detection techniques such as ICP-OES, SERS has the advantages of rapid detection, high non-destructive sensitivity, and good specificity, and can be used in the field of environmental detection. Combining SERS technology with optical fiber can realize high-sensitivity flexible, real-time, in-situ, long-distance, low-loss detection, which has ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N21/01G01N21/65
CPCG01N21/01G01N21/658
Inventor 李宏龙羽婷
Owner WUHAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com